WO2026028401A1 - Dispositif de transmission - Google Patents

Dispositif de transmission

Info

Publication number
WO2026028401A1
WO2026028401A1 PCT/JP2024/027575 JP2024027575W WO2026028401A1 WO 2026028401 A1 WO2026028401 A1 WO 2026028401A1 JP 2024027575 W JP2024027575 W JP 2024027575W WO 2026028401 A1 WO2026028401 A1 WO 2026028401A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
core
optical
input
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/027575
Other languages
English (en)
Japanese (ja)
Inventor
遼 宮武
慈仁 酒井
優 山岡
陽一 深田
晶貴 水野
真良 関口
智暁 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
NTT Inc USA
Original Assignee
Nippon Telegraph and Telephone Corp
NTT Inc USA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, NTT Inc USA filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2024/027575 priority Critical patent/WO2026028401A1/fr
Publication of WO2026028401A1 publication Critical patent/WO2026028401A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water

Definitions

  • the present invention relates to a transmitting device.
  • FIG 13 is a diagram showing the configuration of an optical communication system 900 that provides optical power feeding.
  • the optical communication system 900 provides optical power feeding using the simplest configuration, which uses a multicore fiber (MCF) 101.
  • MCF 101 is a multicore optical fiber having M cores 102 (M is an integer equal to or greater than 2).
  • M is an integer equal to or greater than 2
  • core #m the mth core 102 is referred to as core #m (m is an integer equal to or greater than 1 and equal to or less than M).
  • the optical communication system 900 includes a transmitting device 910 and equipment 920.
  • the transmitting device 910 is installed, for example, in a station building.
  • the transmitting device 910 is connected to the equipment 920 via an MCF 101.
  • the transmitting device 910 includes light sources 911-1 to 911-M.
  • the transmitting device 910 inputs the light output by the light source 911-m into core #m of the MCF 101 to transmit the energy.
  • the remote device 920 has photoelectric converters 921-1 to 921-M, storage batteries 922-1 to 922-M, and a signal processing circuit 923.
  • the light source converter 921-m photoelectrically converts the light from the light source 911-m transmitted through the core #m of the MCF 101, converting it into electricity.
  • the device 920 operates using the power obtained by the photoelectric conversion.
  • the storage battery 922-m stores the power obtained by the light source converter 921-m
  • the signal processing circuit 923 operates by receiving power stored in the storage batteries 922-1 to 922-M.
  • the more light input into the fiber the greater the amount of power obtained by device 920.
  • the amount of light input into the fiber cannot be increased infinitely. From the perspective of safety in the event of fiber breakage and fiber melting due to energy concentration within the fiber, it is necessary to input light so as not to exceed the limit specified for the fiber.
  • the upper limit of the amount of energy that can be input into this fiber is designated P_max.
  • Figure 14 shows the optical intensity of the power supply light transmitted through each core 102 of the MCF 101 in the optical communication system 900.
  • the optical intensity Pm of the power supply light transmitted by core #m corresponds to the optical intensity of the output light from the light source 911-m.
  • Figure 14(a) shows the optical intensity P1 of the light transmitted by core #1 of the MCF 101
  • Figure 14(b) shows the optical intensity P2 of the light transmitted by core #2 of the MCF 101
  • Figure 14(c) shows the sum of the optical intensity of core #1 and the optical intensity of core #2.
  • the sum of the optical intensity P1 and the optical intensity P2 is equal to the upper limit energy amount P_max.
  • Figure 15 shows the configuration of an optical communication system 950 in the above-mentioned conventional technology, in which part of the optical power supply from the transmitter is replaced with data transmission such as control signals (see, for example, Non-Patent Document 1).
  • data transmission such as control signals
  • Non-Patent Document 1 energy transmission and data transmission are performed using MCF.
  • Transmitting device 960 installed in the station is connected to equipment 970 via MCF101.
  • the transmitting device 960 has one or more light sources 911 and a transceiver 961.
  • the MCF101 has at least the same number of cores 102 as the total number of light sources 911 and transceivers 961 included in the transmitting device 960.
  • Figure 15 shows an example where the number of light sources 911 included in the transmitting device 960 is one, and the number of cores in the MCF101 is two.
  • the transmitting device 960 outputs light output by the light source 911 to core #1 of the MCF101, and outputs the data signal of the optical signal output by the transceiver 961 to core #2 of the MCF101.
  • the device 970 has one or more photoelectric converters 921, one or more storage batteries 922, a signal processing circuit 923, and a transceiver 971.
  • the device 970 has the same number of photoelectric converters 921 and storage batteries 922 as the number of light sources 911 that the transmitting device 960 has.
  • the photoelectric converter 921 photoelectrically converts the light transmitted by core #1 of the MCF 101 and stores the obtained power in the storage battery 922.
  • the transceiver 971 converts the data signal transmitted by core #2 of the MCF 101 from an optical signal to an electrical signal and outputs it to the signal processing circuit 923.
  • the signal processing circuit 923 operates by receiving power from the storage battery 922.
  • Figure 16 shows the optical intensity of the power supply light transmitted through each core 102 of the MCF 101 in the optical communication system 950.
  • Figure 16(a) shows the waveform of the optical intensity P1 of the light transmitted through core #1 of the MCF 101
  • Figure 16(b) shows the waveform of the optical intensity P2 of the light transmitted through core #2 of the MCF 101
  • Figure 16(c) shows the sum of the optical intensity of core #1 and the optical intensity of core #2.
  • Optical communication system 950 uses a portion of the maximum energy amount P_max that can be input to the fiber for data transmission.
  • Light with optical intensity P1 output from light source 911 is input to core #1.
  • An optical data signal with optical intensity P2 output from transceiver 961 is input to core #2.
  • the power supply efficiency is lower than that of the conventional optical communication system 900 shown in FIG. 13.
  • the energy supply amount was P_max, but as shown in FIG. 16, in optical communication system 950, the energy supply amount is reduced to P_max - max(P2).
  • “max(xxx)" means the maximum value of waveform xxx.
  • the processing of the optical communication system 950 will be described.
  • the transmitting device 960 has M-1 light sources 911, light source #1 to light source #(M-1), and the device 970 has (M-1) photoelectric converters 921, photoelectric converter #1 to photoelectric converter #(M-1), and (M-1) storage batteries 922, storage battery #1 to storage battery #(M-1).
  • Figure 17 is a flow diagram showing the data transmission operation of the transmitting device 960.
  • the transmitting device 960 performs the process shown in Figure 17.
  • the transceiver 961 of the transmitting device 960 outputs the transmission data of an optical signal to core #M of the MCF 101 (step S901).
  • the transmitting device 960 causes the power supply light source 911#k (k is an integer between 1 and M-1) to emit light at intensity P_core, and inputs the light to core #k of the MCF 101 (steps S902-1 to S902-(M-1)).
  • P_core is calculated using the following equation (1).
  • P_core (P_max-P_cont_max)/(N_core-1)...(1)
  • P_core is the average amount of energy input to each core 102 of the MCF 101.
  • P_max is the total power that can be input to the entire MCF 101.
  • P_cont_max is the maximum optical energy when sending transmission data via core #M.
  • N_core is the number of cores M in the MCF 101.
  • transmission data and optical power supply are transmitted from the station transmitter 960 to the device 970 (step S903).
  • each photoelectric converter #k converts the power supply light transmitted through core #k of MCF101 into electricity, and storage battery #k stores the electricity converted by photoelectric converter #k.
  • Storage battery #1 to storage battery #(M-1) supply the stored electricity to signal processing circuit 923.
  • FIG 18 is a flow diagram showing the data reception operation of the device 970.
  • the transceiver 971 of the device 970 determines whether transmission data has arrived from core #M of the MCF 101 (step S911). If the transceiver 971 determines that transmission data has not arrived (step S911: NO), it repeats the processing of step S911. If the transceiver 971 determines that transmission data has arrived (step S911: YES), it converts the arrived transmission data from an optical signal to an electrical signal and outputs it to the signal processing circuit 923. The signal processing circuit 923 acquires the transmission data (step S912).
  • the present invention aims to provide a transmitting device that can transmit data without reducing power supply efficiency.
  • a transmitter comprises a plurality of light sources that output optical feeds to be input to each of the plurality of cores of a multi-core optical fiber; and a control unit that controls the plurality of light sources to change the optical intensity of the optical feeds input to some of the cores in accordance with transmission data, and to control the plurality of light sources so that the sum of the optical intensities of the optical feeds input to each of the plurality of cores of the multi-core optical fiber becomes a value based on the upper limit of the amount of energy that can be input to the multi-core optical fiber.
  • This invention makes it possible to transmit data without reducing power supply efficiency.
  • FIG. 1 is a configuration diagram of an optical communication system according to a first embodiment of the present invention.
  • FIG. 4 is a diagram illustrating the optical intensity of each core according to the first embodiment.
  • FIG. 10 is a configuration diagram of an optical communication system according to a second embodiment.
  • FIG. 10 is a diagram showing the optical intensity of each core according to the second embodiment.
  • FIG. 10 is a configuration diagram of an optical communication system according to a third embodiment.
  • FIG. 11 is a diagram showing the optical intensity of each core according to the third embodiment.
  • FIG. 11 is a diagram showing a processing flow of a transmitting device according to the third embodiment.
  • FIG. 11 is a diagram showing a processing flow of a transmitting device according to the third embodiment.
  • FIG. 11 is a diagram showing a processing flow of a transmitting device according to the third embodiment.
  • FIG. 11 is a diagram showing a processing flow of a device according to the third embodiment.
  • FIG. 10 is a configuration diagram of an optical communication system according to a fourth embodiment.
  • FIG. 10 is a diagram showing the optical intensity of each core according to the fourth embodiment.
  • FIG. 2 is a diagram illustrating a hardware configuration of a transmission device according to the first to fourth embodiments.
  • FIG. 1 is a diagram illustrating the configuration of an optical communication system according to the prior art.
  • FIG. 1 is a diagram showing the optical intensity of each core according to the prior art.
  • FIG. 1 is a diagram illustrating the configuration of an optical communication system according to the prior art.
  • FIG. 1 is a diagram showing the optical intensity of each core according to the prior art.
  • FIG. 1 is a flow chart showing a data transmission operation of a transmitting device according to the prior art.
  • FIG. 1 is a flow chart showing a data receiving operation of a device according to the prior art.
  • the optical communication system of this embodiment simultaneously transmits data and supplies optical power using an MCF.
  • the transmitter in the optical communication system of this embodiment changes the intensity of the first supply light incident on the first core of the MCF in accordance with the transmitted data, and changes the intensity of the second supply light incident on the second core of the MCF so that the sum of the intensity of the first supply light and the intensity of the second supply light is constant.
  • the transmitter may output multiple pairs of first and second supply lights.
  • the transmitter device has two light sources.
  • FIG. 1 is a diagram showing the configuration of an optical communication system 100 according to the first embodiment.
  • the optical communication system 100 has a transmitting device 110 and a device 120 connected by an MCF 101.
  • the device 120 is an example of a receiving device.
  • the mth core 102 (m is an integer between 1 and M) is referred to as core #m.
  • Transmitting device 110 is installed, for example, in a station building.
  • Transmitting device 110 has a control unit 111 and M light sources 112.
  • the M light sources 112 are referred to as light sources 112-1 to 112-M, respectively.
  • Control unit 111 controls the amplitude of the power supply light of each light source 112.
  • Light source 112-m outputs power supply light, the amplitude of which has been changed according to the control of control unit 111, to core #m of MCF 101.
  • each light source 112 may also have a control unit that has the functionality of control unit 111 controlling that light source 112.
  • Device 120 has M photoelectric converters 121, M storage batteries 122, and a signal processing circuit 124.
  • the M photoelectric converters 121 are respectively referred to as photoelectric converters 121-1 to 121-M, and the M storage batteries 122 are respectively referred to as storage batteries 122-1 to 122-M.
  • Device 920 shown in FIG. 13 can be used as device 120.
  • the photoelectric converter 121-m converts the power supply light transmitted through core #m of the MCF 101 into electricity.
  • the storage battery 122-m stores the electricity converted by the photoelectric converter 121-m and supplies the stored electricity to the signal processing circuit 124.
  • the storage battery 122 has a measurement unit 123.
  • the measurement unit 123 of the storage battery 122-m will be referred to as the measurement unit 123-m.
  • the measurement unit 123-m is a measurement device that measures the energy input to the storage battery 122-m.
  • the energy to be measured is, for example, the input voltage or input power.
  • the signal processing circuit 124 is realized by a processor such as a CPU (central processing unit) reading and executing a program from a memory unit. All or part of the functions of the signal processing circuit 124 may be realized using hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array).
  • the signal processing circuit 124 performs signal processing based on the input voltage or input power measured by the measurement unit 123.
  • Figure 2 is a diagram showing the optical intensity in each core of optical communication system 100.
  • Figure 2(a) shows the waveform of optical intensity P1 of light transmitted by core #1
  • Figure 2(b) shows the waveform of optical intensity P2 of light transmitted by core #2
  • Figure 2(c) shows the sum of optical intensity P1 of core #1 and optical intensity P2 of core #2.
  • the control unit 111 of the transmitting device 110 inputs data D, which is binary information using 0s and 1s.
  • the control unit 111 time-varys the amplitude of the power supply light output by the light source 112-1 to core #1 so that it corresponds to the data D to be transmitted.
  • the data D to be transmitted is represented by the amplitude of the power supply light output by the light source 112-1, i.e., the light intensity P1.
  • control unit 111 controls the amplitude of the power supply light output by the light source 112-2 to core #2 so that it has the inverse characteristics of the amplitude of the power supply light output to core #1.
  • control unit 111 controls the sum of the light intensity P1 of the power supply light output by the light source 112-1 and the light intensity P2 of the power supply light output by the light source 112-2 so that it becomes a constant value of the upper limit energy amount P_max that can be input to the fiber.
  • the control unit 111 may also control the sum of the light intensity P1 and the light intensity P2 so that it becomes equal to or less than the upper limit energy amount P_max.
  • control unit 111 may control the sum of the light intensity P1 and the light intensity P2 so that it becomes a value that is lower than the upper limit energy amount P_max by a predetermined margin value.
  • the margin value is an arbitrary real value that is set in advance from the perspective of safety, etc.
  • the control unit 111 controls the light intensity P1 output by the light source 112-1 so that the light intensity is q0 when the transmission bit of data D is 0, and the light intensity is q1 when the transmission bit of data D is 1. q0 ⁇ q1 or q0 > q1 may be satisfied.
  • the control unit 111 controls the light intensity P1 so that when the light intensity of the powered light from light source 112-1 is q0, the light intensity of the powered light from light source 112-2 is P_max - q0, and when the light intensity of the powered light from light source 112-1 is q1, the light intensity of the powered light from light source 112-2 is P_max - q1.
  • Optoelectric converter 121-1 of device 120 converts the optical power transmitted through core #1 of MCF101 into electricity, and storage battery 122-1 stores the electricity converted by photoelectric converter 121-1. Furthermore, photoelectric converter 121-2 converts the optical power transmitted through core #2 of MCF101 into electricity, and storage battery 122-2 stores the electricity converted by photoelectric converter 121-2. Storage batteries 122-1 and 122-2 supply power to signal processing circuit 124.
  • Device 120 reads data D represented by the power supply light transmitted through core #1. Any method for reading this data can be used.
  • a storage battery is equipped with a mechanism for measuring its input voltage or input current, such as a voltmeter or ammeter. This mechanism is used as measurement unit 123.
  • the input voltage or input power measured by measurement unit 123 can be used to detect time fluctuations in the amplitude of the optical signal. This is because the magnitude of the measured value of the input voltage or input power sensed by measurement unit 123 corresponds to data D transmitted by transmitter 110. Therefore, device 120 can easily obtain the transmission data by utilizing the existing storage battery mechanism.
  • signal processing circuit 124 obtains information on the magnitude of the measured value of the input voltage or input power sensed by measurement unit 123-1 of storage battery 122-1, and restores the transmission data based on the obtained information.
  • the storage battery 122 does not have a measuring unit 123, a voltmeter that measures the input voltage to the storage battery 122 or an ammeter that measures the input power to the storage battery 122 is provided as the measuring unit 123 outside the storage battery 122.
  • data signals can be transmitted using a simple configuration that does not use a transceiver, without reducing power supply efficiency.
  • the first embodiment is a case where the MCF has two cores and one type of data is transmitted.
  • the second embodiment is a case where multiple types of data are transmitted.
  • a case where the number of cores in the MCF is M and the number of types of data is N (M ⁇ 2N, N is an integer equal to or greater than 2) is described.
  • the M light sources provided in the transmitting device are designated as light source #1 to light source #M.
  • light source #1 and light source #2, light source #3 and light source #4, ..., light source #(M ⁇ 1) and light source #M are each considered to be pairs.
  • the transmitting device associates the optical intensity of one light source of the pair with the transmission data, and sets the optical intensity of the other light source of the pair to have the inverse characteristics of the optical intensity of the light source that is the other light source of the pair.
  • FIG 3 is a diagram showing the configuration of an optical communication system 200 according to the second embodiment.
  • the optical communication system 200 has a transmitting device 210 and equipment 220 connected by an MCF 101.
  • the transmitting device 210 is installed, for example, in a station building.
  • the transmitting device 210 includes a control unit 211 and light sources 112-1 to 112-M.
  • the control unit 211 controls the amplitude of the power supply light of each light source 112.
  • the light source 112-m outputs the power supply light, the amplitude of which has been changed in accordance with the control of the control unit 211, to core #m of the MCF 101.
  • Device 220 has photoelectric converters 121-1 to 121-M, storage batteries 122-1 to 122-M, and a signal processing circuit 124.
  • Photoelectric converter 121-m converts the optical power transmitted through core #m of MCF 101 into electrical power.
  • Storage battery 122-m stores the electrical power converted by photoelectric converter 121-m and supplies the stored electrical power to signal processing circuit 124.
  • Signal processing circuit 124 acquires information about the input voltage or input power from measurement unit 123-m of storage battery 122-m, which is connected to photoelectric converter 121-m that has received optical power whose optical intensity has been controlled based on the transmitted data, and performs signal processing based on the acquired information.
  • Figure 4 is a diagram showing the optical intensity in each core of optical communication system 200.
  • Figure 4(a) shows the waveform of optical intensity P1 of light transmitted by core #1
  • Figure 4(b) shows the waveform of optical intensity P2 of light transmitted by core #2
  • Figure 4(c) shows the waveform of optical intensity P3 of light transmitted by core #3
  • Figure 4(d) shows the waveform of optical intensity P4 of light transmitted by core #4.
  • the control unit 211 of the transmitting device 210 inputs data D1 to data DN, which are binary information using 0s and 1s.
  • the control unit 211 time-varys the amplitude of the power supply light output by the light source 112-(2n-1) to the core #(2n-1) so that it corresponds to the bit value of 0 or 1 in the data Dn (n is an integer between 1 and N) to be transmitted.
  • the data Dn to be transmitted is expressed by the amplitude of the power supply light output by the light source 112-(2n-1), i.e., the optical intensity P(2n-1).
  • control unit 211 controls the amplitude of the power supply light output from light source 112-2n to core #2n so that it has the inverse characteristics of the amplitude of the power supply light output to core #(2n-1).
  • control unit 211 controls the sum of the amplitude of the power supply light output from light source 112-(2n-1) and the amplitude of the power supply light output from light source 112-2n so that it is a constant amplitude.
  • the sum of the optical intensity P(2n-1) of the power supply light output from light source 112-(2n-1) and the optical intensity P(2n) of the power supply light output from light source 112-2n becomes a constant value.
  • the control unit 211 then controls the sum of the optical intensities P1 to PM so that it becomes a constant value that is the upper limit energy amount P_max that can be input to the fiber.
  • the control unit 211 may control the sum of light intensities P1 to PM to be equal to or less than the upper limit energy amount P_max.
  • the control unit 211 may control the sum of light intensities P1 to PM to be a value that is lower than the upper limit energy amount P_max by a predetermined margin value.
  • Each photoelectric converter 121-m of device 220 converts the power supply light transmitted through core #m of MCF 101 into electricity.
  • Each storage battery 122-m stores the electricity converted by photoelectric converter 121-m.
  • Storage batteries 122-1 to 122-M supply power to signal processing circuit 124.
  • Signal processing circuit 124 acquires information on the magnitude of the measured values of the input voltage or input power sensed by each measurement unit 123-(2n-1), and restores data Dn based on the acquired information.
  • the second embodiment achieves a total power supply equivalent to that of conventional configurations, while also enabling multiple data transmissions while remaining below the specified fiber input upper limit (P_max).
  • the sum of the feed light in two cores is controlled to create a flat amplitude.
  • the sum of the feed light in three or more cores is controlled to create a flat amplitude.
  • FIG. 5 is a diagram showing the configuration of an optical communication system 300 according to the third embodiment.
  • the optical communication system 300 has a transmitting device 310 and equipment 320 connected by an MCF 101.
  • Transmitting device 310 is installed, for example, in a station building.
  • Transmitting device 310 includes control unit 311 and light sources 112-1 to 112-M.
  • M is 3 or greater.
  • Control unit 311 changes the amplitude of the power supply light output by light source 112-1 so that it corresponds to a bit value of 0 or 1 in data D to be transmitted. Furthermore, it changes the amplitude of the power supply light output by light sources 112-2 to 112-M so that the sum of the optical intensities of the power supply light output by light sources 112-1 to 112-M is equal to the upper limit energy amount P_max.
  • Device 320 has photoelectric converters 121-1 to 121-M, storage batteries 122-1 to 122-M, and a signal processing circuit 124.
  • Photoelectric converter 121-m converts the power supply light transmitted through core #m of MCF 101 into electricity.
  • Storage battery 122-m stores the electricity converted by photoelectric converter 121-m and supplies the stored electricity to signal processing circuit 124.
  • Signal processing circuit 124 acquires information on the input voltage or input power from measurement unit 123-1 of storage battery 122-1 and performs signal processing based on the acquired information.
  • Figure 6 is a diagram showing the optical intensity in each core of optical communication system 300.
  • Figure 6(a) shows the waveform of optical intensity P1 of light transmitted by core #1
  • Figure 6(b) shows the waveform of optical intensity P2 of light transmitted by core #2
  • Figure 6(c) shows the waveform of optical intensity P3 of light transmitted by core #3
  • Figure 6(d) shows the sum of the optical intensities P1 to P3 of cores #1 to #3, respectively.
  • the control unit 311 of the transmitting device 310 inputs data D, which is binary information using 0s and 1s.
  • the control unit 211 time-varys the amplitude of the power supply light output by the light source 112-1 to core #1 so that it corresponds to the bit value of 0 or 1 in the data D to be transmitted.
  • the data D to be transmitted is represented by the amplitude of the power supply light output by the light source 112-1, i.e., the light intensity P1.
  • control unit 311 controls the sum of the amplitude of the power supply light output by light source 112-1 to core #1, the amplitude of the power supply light output by light source 112-2 to core #2, and the amplitude of the power supply light output by light source 112-3 to core #3 so that it becomes a constant value (flat).
  • control unit 311 controls the sum of the light intensity P1 of the power supply light output by light source 112-1, the light intensity P2 of the power supply light output by light source 112-2, and the light intensity P3 of the power supply light output by light source 112-3 so that it becomes a constant value of the upper limit energy amount P_max.
  • the control unit 311 may also control the sum of the light intensities P1 to P3 so that it becomes a constant value that is lower than the upper limit energy amount P_max by a predetermined margin.
  • Each photoelectric converter 121-m of device 320 converts the power supply light transmitted through core #m of MCF 101 into electricity.
  • Each storage battery 122-m stores the electricity converted by photoelectric converter 121-m.
  • Storage batteries 122-1 to 122-M supply power to signal processing circuit 124.
  • Signal processing circuit 124 acquires information on the magnitude of the measured value of the input voltage or input power sensed by measurement unit 123-1, and restores data D based on the acquired information.
  • the control unit 311 In addition to the configuration in the first and second embodiments where the amplitude resulting from adding two optical waveforms is flat, it is also possible to flatten the amplitude resulting from adding three optical waveforms as shown in FIG. 6, or, by further extension, to flatten the amplitude resulting from adding any number of optical waveforms.
  • the control unit 311 generates the optical waveforms output by light sources 112-2 and 112-3 so that the sum of the optical waveform transmitted through core #2 and the optical waveform transmitted through core #3 corresponds to "P_max - P1".
  • the energy distribution ratio between core #2 and core #3 may be arbitrary. The simplest example would be to generate waveforms so that the optical intensity in core #2 and the optical intensity in core #3 are each (P_max - P1)/2, and divide the energy equally.
  • the waveform of the sum of the light in each core (for example, the waveform of P1+P2+P3 in Figure 6) is "flattened," flattening is not a mandatory requirement; it is sufficient that the sum of the waveforms in each core is equal to or less than the upper limit energy amount P_max.
  • control may be performed so that the sum of the waveforms in each core is a value that is lower than the upper limit energy amount P_max by a predetermined margin.
  • FIGS. 7 and 8 are flow diagrams showing the operation of the transmitting device 310.
  • the light source 112-m provided in the transmitting device 310 is referred to as light source #m.
  • P_core is calculated using the following equation (2).
  • P_core is the average amount of energy input to each core 102 of the MCF 101.
  • P_max is the total power that can be input to the entire MCF 101.
  • N_core is the number of cores M of the MCF 101. Note that instead of P_max in equation (2), P_core may be calculated using a value obtained by subtracting a predetermined margin value from P_max.
  • step S13 optical power feeding without transmitting data is performed from the transmitter 310 in the station (step S13).
  • the transmitter 310 repeats the process from step S11.
  • the control unit 311 determines that there is data to transmit (step S11: YES), it performs the processing of FIG. 8. That is, the control unit 311 determines the time waveform f(t) of light source #1 that corresponds to the transmission data to be transmitted (step S21).
  • the transmission data is converted into a binary number, and when the value is 0, the light intensity is set to q0, and when the value is 1, the light intensity is set to q1, and the waveform generated is defined as f(t). If the binary number of the transmission data is "01001" and q0 ⁇ q1, the light intensity strength will be "weak strong weak weak strong.”
  • the control unit 311 uses the total amount of energy P_max that can be input to the fiber and the time waveform f(t) and the time waveform f'(t) to calculate the average energy P_core2 that can be input to the remaining cores using the following formula (step S23).
  • P_core2 ⁇ P_max-(f(t)+f'(t)) ⁇ /(N_core-2).
  • P_core2 may be calculated using the value obtained by subtracting a predetermined margin value from P_max.
  • the control unit 311 causes light source #1 to emit light with time waveform f(t) and causes the power supply light output from light source #1 to enter core #1 (step S24-1).
  • the control unit 311 causes light source #2 to emit light with time waveform f'(t) and causes the power supply light output from light source #2 to enter core #2 (step S24-2).
  • the control unit 311 also causes light source #3 to light source #M to emit light with optical intensity P_core2 and causes the power supply light output from light source #3 to light source #M to enter core #3 to core #M (steps S24-3 to S24-M). This allows optical power supply carrying transmission data from the transmission device 310 in the central office to the device 320 (step S25).
  • the transmitting device 310 repeats the process from step S11 in Figure 7.
  • FIG. 9 is a flow diagram showing the data reception operation of device 320.
  • the signal processing circuit 124 determines whether the energy at the input terminal measured by measurement unit 123-1 of storage battery 122-1 has fluctuated above a threshold value (step S31). Energy is, for example, a voltage value or a current value. If the signal processing circuit 124 determines NO in step S31, it repeats the processing of step S31.
  • step S31 determines in step S31 that the energy at the input end measured by the measurement unit 123-1 has fluctuated over time by more than the threshold value (step S31: YES), it performs the process of step S32. That is, the signal processing circuit 124 converts the time-varying waveform at the input end of the storage battery 124-1 measured by the measurement unit 123-1 into the original transmission data, and obtains the data transmitted from the transmitting device 310 (step S32). The transmitting device 310 repeats the process from step S31.
  • L sets (L is an integer greater than or equal to 2) of M sets of light sources 113 in the transmitting device 310 and M sets of photoelectric converters 121 and M sets of storage batteries 122 in the device 320.
  • Each set operates in the same manner as above.
  • the control unit 311 calculates the value of P_core2 by substituting (f(t) + f'(t)) x L for (f(t) + f'(t)) in equation (3) and (N_core-2L) for (N_core-2).
  • the amplitude of light transmitted through the cores is controlled to correspond to the bit value 0 or 1 contained in the data to be transmitted.
  • one core is illuminated and the other core is not illuminated to correspond to the bit value 0 or 1 contained in the data to be transmitted.
  • FIG. 10 is a diagram showing the configuration of an optical communication system 400 according to the fourth embodiment.
  • the optical communication system 400 has a transmitting device 410 and equipment 120 connected by an MCF 101.
  • Transmitting device 410 is installed, for example, in a station building.
  • Transmitting device 410 includes light sources 112-1 and 112-2 and an optical switch 411.
  • Each light source 112-m generates a feed light of a predetermined optical intensity that is incident on core #m of MCF 101.
  • Optical switch 411 switches between the feed light output by light source 112-1 and the feed light output by light source 112-2 to be output to MCF 101 according to the data D to be transmitted.
  • Figure 11 is a diagram showing the optical intensity in each core of optical communication system 400.
  • Figure 11(a) shows the waveform of optical intensity P1 of light transmitted by core #1
  • Figure 11(b) shows the waveform of optical intensity P2 of light transmitted by core #2
  • Figure 11(c) shows the sum of optical intensity P1 of core #1 and optical intensity P2 of core #2.
  • Optical switch 411 controls which of light source 112-1 and light source 112-2 to turn ON and which to turn OFF, corresponding to each bit value of 0 or 1 in the data D to be transmitted. For example, when the data bit value is "1,” optical switch 411 turns on light source 112-1 to emit light and turns off light source 112-2. Furthermore, when the data bit value is "0,” optical switch 411 turns on light source 112-2 to emit light and turns off light source 112-1. When the switches are ON, light source 112-1 and light source 112-2 output power supply light with optical intensity P_max, and when the switches are OFF, they do not output power supply light (optical intensity 0). As a result, transmitter 410 sets the sum of the optical intensity of core #1 and the optical intensity of core #2 to a flat value of P_max.
  • the optical switch 411 may operate to pass the power supply light from light source 112-1 to enter core #1 and block the power supply light from light source 112-2, and when the data bit value is "0", it may operate to pass the power supply light from light source 112-2 to enter core #2 and block the power supply light from light source 112-1.
  • the light source 112 may output power supply light with an optical intensity lower than P_max.
  • the waveform of the light transmitted through each core is designed so that the waveform representing the sum of the time waveforms of the light transmitted through each core of the multi-core optical fiber does not exceed the maximum energy amount specified for that multi-core optical fiber.
  • the optical communication system controls the amplitude of the feed light so that the time waveform representing the sum of the feed light in each core does not exceed a certain value.
  • One method for controlling amplitude as described above is to create a first waveform carrying data in one optical feed, and then determine the amplitude of the remaining optical feeds based on information related to the difference between this first waveform and the maximum amount of energy available in the multi-core optical fiber.
  • one method for determining the amplitude of the remaining other optical power supply based on information related to the difference is to set the amplitude of the optical power supply that does not contain transmission data to an amplitude equivalent to "(amplitude of the first waveform) - (value of the maximum amount of energy usable in the multi-core optical fiber) - margin value.”
  • the margin value is an arbitrary real value that is set in advance from the perspective of safety, etc.
  • the N types of transmission data can be represented by power supply light, and the waveforms of the remaining M-N cores can be controlled to make the total waveform of each core of the multi-core optical fiber flat.
  • the receiving device does not use a transceiver, but acquires the data transmitted from the transmitting device based on the measurement results of the power obtained by photoelectric conversion of the power supply light transmitted through each core of the multi-core optical fiber.
  • the power obtained by photoelectric conversion of the power supply light transmitted through each core may be measured, for example, using an energy meter provided in a storage battery that measures the amount of energy such as voltage and power.
  • FIG. 12 is a diagram showing an example hardware configuration of the transmission devices 110, 210, 310, and 410.
  • the transmission devices 110, 210, 310, and 410 include a processor 701, a storage unit 702, a communication interface 703, and a user interface 704.
  • Processor 701 is a central processing unit that performs calculations and control.
  • Processor 701 is, for example, a CPU.
  • Processor 701 reads and executes programs from memory unit 702.
  • Memory unit 702 also has a work area when processor 701 executes various programs.
  • Communication interface 703 is connected to other devices so that communication is possible.
  • Communication interface 703 includes light source 112.
  • User interface 704 is an input device such as a keyboard, pointing device (mouse, tablet, etc.), button, or touch panel, or a display device such as a display. Human operations are input via user interface 704.
  • At least some of the functions of the control unit 111 of transmitting device 110, the control unit 211 of transmitting device 210, the control unit 311 of transmitting device 310, and the optical switch 411 of transmitting device 410 are realized by the processor 701 reading and executing a program from the storage unit 702.
  • the programs of the control units 111, 211, 311, and the optical switch 411 may be recorded on a computer-readable recording medium. Examples of computer-readable recording media include portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into computer systems.
  • the programs of the control units 111, 211, 311, and the optical switch 411 may be transmitted via telecommunications lines. Note that all or some of the functions of the control units 111, 211, 311, and the optical switch 411 may be realized using hardware such as an ASIC, PLD, or FPGA.
  • the transmitting device has multiple light sources and a control unit.
  • Each light source outputs a feed light to be input to each of the multiple cores of the multi-core optical fiber.
  • the control unit changes the optical intensity of the feed light input to some of the cores in accordance with the transmission data, and controls the multiple light sources so that the sum of the optical intensities of the feed light input to each of the multiple cores of the multi-core optical fiber becomes a value based on the upper limit of the amount of energy that can be input to the multi-core optical fiber.
  • the value based on the upper limit may be the upper limit of the amount of energy that can be input to the multi-core optical fiber itself, or may be a value that is a predetermined value lower than the upper limit of the amount of energy that can be input to the multi-core optical fiber. If the output power of the light source fluctuates over time depending on environmental factors such as temperature, a margin may be provided from the upper limit of the amount of energy based on the expected amount of fluctuation.
  • the control unit may determine the time waveform of the power supply light to be input to some of the cores in accordance with the transmission data, and may determine the time waveform of the power supply light to be input to cores other than some of the cores based on the difference between the upper limit of the amount of energy that can be input to the multi-core optical fiber and the determined time waveform.
  • the multiple light sources may include one or more pairs each consisting of one first light source and one or more second light sources.
  • the control unit changes the optical intensity of the power supply light output by the first light source for each pair in accordance with the transmission data, and controls the sum of the optical intensity of the power supply light output by the first light source and the optical intensity of the power supply light output by the second light source to be a constant value based on the upper limit of the amount of energy that can be input to the multi-core optical fiber.
  • a receiving device connected to the transmitting device via a multi-core optical fiber converts the power supply light transmitted through each of the multiple cores of the multi-core optical fiber into electric power, and acquires transmission data based on the measurement results of a measuring device that measures the input energy to a storage battery that stores the converted electric power.
  • the transmitting device corresponds to, for example, devices 120, 220, and 320 in the embodiments.
  • the control unit of the transmission device of this embodiment can also be realized by a computer and a program, and the program can be recorded on a recording medium or provided over a network.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

Ce dispositif de transmission comprend une pluralité de sources de lumière et une unité de commande. Chacune de la pluralité de sources de lumière délivre une lumière d'alimentation qui est entrée dans chacun d'une pluralité de cœurs inclus dans une fibre optique multicœur. L'unité de commande commande la pluralité de sources de lumière de telle sorte que l'intensité lumineuse de l'entrée de lumière d'alimentation dans certains des cœurs est modifiée correspondant à des données de transmission, et la somme des intensités de lumière de l'entrée de lumière d'alimentation dans chacun de la pluralité de cœurs inclus dans la fibre optique multicœur est une valeur basée sur la valeur limite supérieure de la quantité d'énergie qui peut être entrée dans la fibre optique multicœur.
PCT/JP2024/027575 2024-08-01 2024-08-01 Dispositif de transmission Pending WO2026028401A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/027575 WO2026028401A1 (fr) 2024-08-01 2024-08-01 Dispositif de transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/027575 WO2026028401A1 (fr) 2024-08-01 2024-08-01 Dispositif de transmission

Publications (1)

Publication Number Publication Date
WO2026028401A1 true WO2026028401A1 (fr) 2026-02-05

Family

ID=98607227

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/027575 Pending WO2026028401A1 (fr) 2024-08-01 2024-08-01 Dispositif de transmission

Country Status (1)

Country Link
WO (1) WO2026028401A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013179604A1 (fr) * 2012-05-29 2013-12-05 日本電気株式会社 Dispositif de transmission optique, système de transmission optique et procédé de transmission optique
JP2014042166A (ja) * 2012-08-22 2014-03-06 Sumitomo Electric Ind Ltd 光学装置および給電システム
WO2021024689A1 (fr) * 2019-08-05 2021-02-11 京セラ株式会社 Système d'alimentation à fibres optiques et câble à fibres optiques
WO2024024707A1 (fr) * 2022-07-27 2024-02-01 日本電信電話株式会社 Système et procédé qui mettent en œuvre une communication optique au moyen d'une lumière d'alimentation électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013179604A1 (fr) * 2012-05-29 2013-12-05 日本電気株式会社 Dispositif de transmission optique, système de transmission optique et procédé de transmission optique
JP2014042166A (ja) * 2012-08-22 2014-03-06 Sumitomo Electric Ind Ltd 光学装置および給電システム
WO2021024689A1 (fr) * 2019-08-05 2021-02-11 京セラ株式会社 Système d'alimentation à fibres optiques et câble à fibres optiques
WO2024024707A1 (fr) * 2022-07-27 2024-02-01 日本電信電話株式会社 Système et procédé qui mettent en œuvre une communication optique au moyen d'une lumière d'alimentation électrique

Similar Documents

Publication Publication Date Title
US6311137B1 (en) Information display apparatus, information relay apparatus used in power generation system, information display method and information relay method, and information transmission method
RU2398259C2 (ru) Силовая шина радиопередатчика
US8311591B2 (en) Closed-loop efficiency modulation for use in network powered applications
US20130085692A1 (en) Power measuring system
CN115037365A (zh) 一种大功率自由空间光通信系统高速可拓展编码器
CN100379184C (zh) 资料传送装置、光电转换电路以及测试装置
CN102420663A (zh) 光收发器中的动态存储器分配
WO2026028401A1 (fr) Dispositif de transmission
US20200333165A1 (en) Meter reading schema to enhance system functionality
CN110062997A (zh) 电力传输系统
CN110715791A (zh) 一种光纤型激光能量分配网络系统及分配方法
CN107862851B (zh) Mbus总线发送信号转换电路及其转换方法
CN108336732A (zh) 一种基于新能源和市电供电的家庭灵活供电系统
US20220311282A1 (en) Optical power supply system
CN110620616B (zh) 弱相干光源装置以及量子密钥分发系统
CN116599245A (zh) 一种主从式传感器激光基站供电系统、方法和设备
Jenila et al. Simultaneous lightwave information and power transfer-based design of green IoT communication system
CN208337588U (zh) 一种光终端设备及无源光纤网络
JP4279851B2 (ja) データ伝送装置及び試験装置
Garinto Integration of DC Power Distribution System and Digital Transmission System
CN110887991B (zh) 电流测量装置
Reza et al. Design and implementation of a packeted DC power system using a modified power packet structure
CN219874505U (zh) 配电柜用电气元件状态监测电路
Simić et al. Software based Experimental System for Electrical Power Quality Measurement using the Wireless Sensor Network Modules
Garinto On Digital Power Transmission Systems

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24949686

Country of ref document: EP

Kind code of ref document: A1