WO2008106878A1 - An electric-optic conversion module, an optic-electric conversion module and a conversion method - Google Patents

An electric-optic conversion module, an optic-electric conversion module and a conversion method Download PDF

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Publication number
WO2008106878A1
WO2008106878A1 PCT/CN2008/070338 CN2008070338W WO2008106878A1 WO 2008106878 A1 WO2008106878 A1 WO 2008106878A1 CN 2008070338 W CN2008070338 W CN 2008070338W WO 2008106878 A1 WO2008106878 A1 WO 2008106878A1
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WIPO (PCT)
Prior art keywords
optical
signal
unit
wavelength
electrical
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Ceased
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PCT/CN2008/070338
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English (en)
French (fr)
Inventor
Naisheng Zhang
Changzheng Su
Xingyue Sha
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP08706711A priority Critical patent/EP2109241A4/en
Publication of WO2008106878A1 publication Critical patent/WO2008106878A1/zh
Priority to US12/554,224 priority patent/US8315524B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/506—Multiwavelength transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0256—Optical medium access at the optical channel layer
    • H04J14/0257—Wavelength assignment algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0256—Optical medium access at the optical channel layer
    • H04J14/0258—Wavelength identification or labelling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0276—Transmission of OAMP information using pilot tones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/03—WDM arrangements
    • H04J14/0307—Multiplexers; Demultiplexers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0279—WDM point-to-point architectures

Definitions

  • Electro-optical conversion module, photoelectric conversion module and conversion method The present application claims priority to Chinese patent application filed on March 5, 2007, the Chinese Patent Office, application number 200710027058.5, and the invention titled "Electro-optical conversion module, photoelectric conversion module and method" The entire contents of which are incorporated herein by reference.
  • the present invention relates to the field of optical communications, and in particular to an electro-optical conversion module, a photoelectric conversion module, and a conversion method. Background technique
  • Wavelength Division Multiplexing (WDM) optical transmission systems have been widely used to synthesize optical signals of different wavelengths into one signal by wavelength division multiplexing ( Wavelength division multiplexing) transmission in optical fibers effectively increases the transmission bandwidth of the communication network.
  • FIG. 1 it is a schematic diagram of a composition of a transmitting end device in a wavelength division multiplexing optical transmission system in the prior art.
  • a plurality of optical port boards 11 are included, and a plurality of electro-optical conversion modules 12 for performing electro-optical conversion on the electrical signals of the respective paths, and for the electro-optical conversion module 12 from each of the electro-optical conversion modules 12 are included.
  • Each wavelength optical signal is wavelength division multiplexed into a multiplexer 13 of an optical signal, and each optical port board 11 transmits each optical signal transmission to the multiplexer 13 through a corresponding optical fiber jumper.
  • FIG. 2 it is a schematic diagram of a composition of a receiving end device in a wavelength division multiplexing optical transmission system of the prior art.
  • the receiving end device includes a demultiplexing plate 21 for demultiplexing the optical wavelength division multiplexing signal to be converted into an optical signal of each wavelength, a plurality of optical port boards 22, and a plurality of Each of the wavelength optical signals is converted into an electrical signal photoelectric conversion module 23, and the splitter board transmits each optical signal transmission to each optical port board 22 through a corresponding optical fiber jumper.
  • the receiving device requires a large number of optical port boards and optical modules to implement corresponding electro-optical conversion or photoelectric conversion, so that the transmitting end or the receiving end device has a large volume, and the internal optical fiber jumper data is large and the connection is complicated. It is beneficial to improve the integration of the device, which is not conducive to reducing the power consumption of the device, which is not conducive to simplifying operation and maintenance. Summary of the invention
  • Embodiments of the present invention provide an electro-optical conversion module, a photoelectric conversion module, and a conversion method, which can realize electro-optical conversion of multiple electrical signals or photoelectric conversion of multiple optical signals in the same electro-optical conversion module or photoelectric conversion module.
  • An embodiment of the present invention provides an electro-optical conversion module, including an electrical interface unit, a plurality of electro-optical conversion units coupled to the electrical interface unit, a multiplexer unit coupled to the plurality of electro-optical conversion units, and an optical interface unit, where:
  • An electrical interface unit configured to receive multiple electrical signals to be converted, and transmit each of the electrical signals to be converted to a corresponding electro-optical conversion unit;
  • An electro-optical conversion unit configured to convert an electrical signal from the electrical interface unit into an optical signal
  • a multiplexing unit configured to wavelength-multiplex multiplex the optical signals from each of the electro-optical conversion units into one optical wavelength division multiplexed signal ;
  • An optical interface unit for outputting an optical signal from the multiplex unit.
  • Embodiments of the present invention provide a photoelectric conversion module including a wavelength division unit, a plurality of photoelectric conversion units coupled to the wavelength division unit, and an electrical interface unit coupled to the plurality of photoelectric conversion units, wherein:
  • a demultiplexing unit configured to demultiplex the received optical wavelength division multiplexing signal to be converted into multiple wavelength optical signals to be converted, and transmit each of the wavelength optical signals to be converted to a corresponding photoelectric conversion unit
  • a photoelectric conversion unit configured to convert the wavelength optical signal to be converted from the branching unit into an electrical signal
  • An electrical interface unit for outputting an electrical signal from each of the photoelectric conversion units.
  • An electro-optical conversion unit converts the electrical signal to be converted into an optical signal
  • the optical signals from each of the electro-optical conversion units are wavelength division multiplexed into one optical wavelength division multiplexed signal.
  • the optical signal to be converted is converted into an electrical signal.
  • the electro-optical conversion module receives the electrical signals to be converted by the electrical interface unit and distributes the electrical signals to be converted to each electro-optical conversion unit, and the electro-optical conversion unit will receive the electric
  • the electrical signals of the interface unit are converted into optical signals, and the optical signals from each of the electro-optical conversion units are wavelength-multiplexed into one optical wavelength division multiplexed signal by a combining unit.
  • the photoelectric conversion module of the embodiment of the present invention demultiplexes the received optical wavelength division multiplexed signal to be converted into each wavelength optical signal to be converted, and the optical signal of each wavelength to be converted Distributing the distribution to a corresponding photoelectric conversion unit, converting the optical signal to be converted from the branching unit into an electrical signal by a photoelectric conversion unit, and transmitting an electrical signal from each of the photoelectric conversion units through an electrical interface unit Output.
  • the electro-optical conversion module, the photoelectric conversion module and the method provided by the embodiments of the invention realize electro-optical conversion of multi-channel electrical signals or photoelectric conversion of multi-channel optical signals in the same module, thereby effectively improving device integration and reducing
  • the small device size simplifies the internal fiber jumper complexity, reduces device power consumption, and improves device reliability.
  • FIG. 1 is a schematic diagram of a composition of a transmitting end device in a wavelength division multiplexing system of the prior art
  • FIG. 2 is a schematic diagram of a composition of a receiving end device in a wavelength division multiplexing system of the prior art
  • a schematic diagram of an electro-optical conversion module
  • FIG. 4 is a schematic diagram of the composition of a photoelectric conversion module according to an embodiment of the present invention.
  • FIG. 5 is a schematic flow chart of an electro-optical conversion method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of a photoelectric conversion method according to an embodiment of the present invention. detailed description
  • the electro-optical conversion module according to the embodiment of the present invention mainly includes an electrical interface unit 31, a plurality of electro-optical conversion units 32 coupled to the electrical interface unit 31, and a coupling with the plurality of electro-optical conversion units 32.
  • the wave unit 33, the wavelength detecting unit 34, the control unit 35, the dispersion compensation unit 36, and the optical interface 37 The function and relationship of each unit will be described in detail below.
  • the electrical interface unit 31 is mainly configured to receive multiple electrical signals to be converted, and distribute each of the electrical signals to be converted to a corresponding one of the electro-optical conversion units 32.
  • the electrical signal to be converted is the electrical data of the service data to be converted, and the electrical interface unit 31 implements the electrical connection between the electro-optical conversion module and the corresponding physical sink board according to the embodiment of the present invention.
  • the electrical connection includes a power feed, a digital control signal, an analog signal, a service data electrical signal to be converted, and the like.
  • the electrical signal to be converted that is, the service data electrical signal to be converted is an RF high-frequency signal
  • the RF high-frequency signal such as the to-be-converted service data electrical signal generally needs to be pre-emphasized in the signal generation, so as to realize the transmission gain (or attenuation) of each optical signal transmission channel to some extent in advance.
  • the optical signal is compensated.
  • the pre-emphasis processing is similar to the prior art, and is not described here.
  • the RF high frequency signal such as the service data electrical signal to be converted is transmitted in the form of a differential microstrip line during transmission.
  • the electrical outlet interface transmission signal distribution structure of the electrical interface unit 31 is as shown in Table 1 below:
  • S represents the RF high frequency signal
  • gnd is the reference ground signal
  • the white blank is the other DC, low frequency or power supply signal.
  • the RF high frequency signal distribution has the following characteristics: Adjacent to the differential pair, the differential pair signal (RF high-frequency signal) is surrounded by gnd signals, and the differential pairs are separated by at least two pins, and the adjacent differential pair signals do not form a relative relationship.
  • An electro-optical conversion unit 32 is configured to convert an electrical signal from the electrical interface unit 31 into an optical signal.
  • the electrical signal received by the electro-optical conversion unit 32 is a high-frequency service data signal, since the signal channel cannot be an ideal broadband response function, that is, the gain (or attenuation) of the signal passing varies with the frequency of the signal. Because the high-frequency service data signals generally contain different frequency components, after the channel is transmitted, the signal will be deformed, and before the electro-optic conversion, the electrical signals need to be equalized and the clock data recovery processing is performed ( CDR, Clock and data recover ), the specific implementation process is similar to the prior art, and therefore will not be described here.
  • the combining unit 33 is configured to wavelength-multiplex the optical signals from each of the electro-optical conversion units 32 into one optical wavelength division multiplexing signal.
  • the wavelength detecting unit 34 is configured to detect wavelength information of each wavelength optical signal in the optical wavelength division multiplexed signal from the combining unit 33, so that the control unit 35 is based on the detected optical signal of each wavelength.
  • the wavelength information generates control commands corresponding to each of the electro-optical conversion units, and each of the electro-optical conversion units 32 adjusts the wavelength of the corresponding output optical signal according to the control command.
  • the wavelength detection control unit 34 mainly includes:
  • the beam splitter 341 is configured to divide the optical wavelength division multiplexed signal from the combining unit 33 into a first optical wavelength division multiplexed signal and a second optical wavelength division multiplexed signal.
  • the wavelength detector 342 is configured to detect wavelength information of each of the wavelength optical signals from the second optical wavelength division multiplexing signal of the optical splitter 341.
  • the control unit 35 is configured to perform adjustment control on the wavelength of the output optical signal of each of the electro-optical conversion units.
  • control unit 35 generally includes a microprocessor (MCU) for controlling the optical signal output wavelength, output power and the like of each of the electro-optical conversion units.
  • MCU microprocessor
  • the control unit 35 performs sampling amplification and modulus on the wavelength information of each wavelength optical signal detected by the wavelength detecting unit 34, as in controlling the optical signal output wavelength of each electro-optical conversion unit.
  • the AD is converted into a digital signal corresponding to the output wavelength information of each electro-optical conversion unit 32, and the microprocessor (MCU) converts the each of the electro-optic lights
  • the digital signal of the element 32 outputting the wavelength information is compared with the pre-calibrated data and a control command for controlling the corresponding electro-optical conversion unit 32 to increase, not change or reduce its output wavelength is generated based on the comparison result.
  • electro-optic modulation parameters such as output optical power, extinction ratio, and cross-point of each electro-optical conversion unit 32.
  • the dispersion compensation unit 36 is connected to the optical splitter for performing dispersion compensation on the first optical wavelength division multiplexed signal from the optical splitter 341.
  • the optical interface 37 is for outputting an optical signal from the dispersion compensation unit 36.
  • the electro-optical conversion module implements photoelectric conversion of multiple electrical signals in the same module, and performs wavelength division multiplexing on each optical signal after photoelectric conversion through a multiplexer unit.
  • the integration degree of the electro-optical conversion device is effectively improved, the number of optical fiber jumpers of the electro-optical conversion device is reduced, the power consumption of the electro-optical conversion device is reduced, the volume of the electro-optical conversion device is reduced, and the electro-optic conversion is improved.
  • Equipment reliability is achieved by the integration degree of the electro-optical conversion device is effectively improved, the number of optical fiber jumpers of the electro-optical conversion device is reduced, the power consumption of the electro-optical conversion device is reduced, the volume of the electro-optical conversion device is reduced, and the electro-optic conversion is improved.
  • FIG. 4 it is a schematic diagram of a composition of a photoelectric conversion module according to an embodiment of the present invention.
  • the photoelectric conversion module according to the embodiment of the present invention mainly includes a demultiplexing unit 41, a plurality of photoelectric conversion units 42 coupled to the demultiplexing unit, a bias voltage generating circuit 43, and a plurality of signal processing units 44. And an electrical interface unit 45 coupled to the plurality of signal processing units. The function and relationship of each unit are described in detail below.
  • the demultiplexing unit 41 is configured to demultiplex the received optical wavelength division multiplexing signal to be converted into multiple wavelength optical signals to be converted, and distribute each wavelength optical signal to be converted to a corresponding one.
  • the photoelectric conversion unit In the photoelectric conversion unit.
  • the photoelectric conversion unit 42 is configured to convert the optical signal to be converted from the branching unit into an electrical signal.
  • the electrical signal obtained by converting the optical signal by the photoelectric conversion unit is generally an optical signal in the form of a photocurrent.
  • a bias voltage generating circuit 43 is provided for supplying a bias voltage to each of the photoelectric conversion units.
  • the bias voltage generating circuit 43 uniformly supplies a bias voltage to each of the photoelectric conversion units, and each photoelectric conversion unit shares the same bias voltage generating circuit to effectively reduce the present hair.
  • the complexity of the photoelectric conversion module described in the embodiment improves the module integration degree, reduces the power consumption of the device, and is beneficial to improving the reliability of the electro-optical conversion module.
  • the signal processing unit 44 is configured to process the electrical signal from the photoelectric conversion unit 42 to obtain a service data electrical signal.
  • the signal processing unit 44 includes a Transimpedance Amplifier (TIA), a Limiting Amplifier, and a Clock and Data Recover (CDR).
  • TIA Transimpedance Amplifier
  • CDR Clock and Data Recover
  • the electrical interface unit 45 is for outputting the service data electrical signals from each of the signal processing units 44.
  • the functions and structures implemented by the electrical interface unit 45 are similar to those of the electrical interface unit 32 in the electro-optical conversion module described in the embodiments of the present invention.
  • the structural distribution of the electrical socket interface transmission signal of the electrical interface unit 45 is the same as or similar to the structural distribution of the socket interface transmission signal of the electrical interface unit 32, and details are not described herein.
  • Each of the signal processing units sums up the output to the socket interface of the electrical interface unit 45 and the RF data of the service data electrical signal between the socket interface of the electrical interface unit 45 and the corresponding sink board are differential microstrip lines The form of transmission.
  • the photoelectric conversion module realizes demultiplexing the optical wavelength division multiplexing signal to be converted into a multi-channel optical signal in the same module, and converting each of the wavelength optical signals into The electrical signal is output through the differential microstrip line through the same electrical socket interface, thereby effectively improving the integration degree of the photoelectric conversion device, reducing the number of optical fiber jumpers of the photoelectric conversion device, reducing the power consumption of the photoelectric conversion device, and reducing the photoelectric conversion device.
  • the volume increases the reliability of the photoelectric conversion equipment.
  • an embodiment of the present invention further provides an electro-optical conversion method, which will be specifically described below by way of embodiments.
  • FIG. 5 it is a schematic flowchart of an electro-optical conversion method according to an embodiment of the present invention. As shown The implementation process of this embodiment is as follows:
  • Step s501 The electrical interface unit receives multiple electrical signals to be converted, and distributes each of the electrical signals to be converted in the corresponding one to the corresponding one of the electro-optical conversion units.
  • the electrical signal to be converted is an electrical data signal to be converted, and the electrical interface unit implements an electrical connection between the electro-optical conversion module and the corresponding physical sink board according to the embodiment of the present invention.
  • the electrical connection includes a power feed, a digital control signal, an analog signal, a service data electrical signal to be converted, and the like.
  • the electrical signal to be converted is an RF high-frequency signal
  • the RF high-frequency signal such as the electrical data signal to be converted
  • the RF high-frequency signal is generally subjected to pre-emphasis processing when the signal is generated, so as to achieve a certain degree of transmission gain (or attenuation) according to each optical signal transmission channel.
  • the road light signal is compensated.
  • the pre-emphasis processing process is similar to the prior art, and details are not described herein.
  • the RF high frequency signal such as the service data electrical signal to be converted is transmitted in the form of a differential microstrip line during transmission.
  • the socket interface transmission signal distribution structure of the electrical interface unit is as shown in Table 2 below:
  • S represents the RF high frequency signal
  • gnd is the reference ground signal
  • the white blank is other signals such as DC, low frequency or power supply.
  • the RF high-frequency signal distribution has the following characteristics: two adjacent pairs are differential pairs, and the differential pair signal (RF high-frequency signal) is surrounded by gnd signals, and the differential pairs are separated by at least two pins, and the adjacent differential pair signals are There is no relative relationship between them.
  • Step s502 The electro-optical conversion unit converts the electrical signal to be converted from the electrical interface unit into an optical signal.
  • the electrical signal received by the electro-optical conversion unit is a high frequency service data signal due to The signal path cannot be an ideal broadband response function, that is, the gain (or attenuation) of the signal passing varies with the frequency of the signal, and since the high frequency service data signal generally contains different frequency components, After the channel is transmitted, the signal will be deformed. Before the electro-optical conversion, the electrical signal needs to be equalized and the clock data recovery processing (CDR) is required.
  • CDR clock data recovery processing
  • Step s503 The multiplexer unit wavelength-multiplexes the optical signals from each of the electro-optical conversion units into one optical wavelength division multiplexed signal.
  • Step s504 The optical wavelength division multiplexing signal from the combining unit is divided into a first optical wavelength division multiplexing signal and a second optical wavelength division multiplexing signal.
  • Step s505 Perform dispersion compensation on the first optical wavelength division multiplexed signal and output the same; and detect wavelength information of each wavelength optical signal in the second optical wavelength division multiplexed signal.
  • Step s506 Generate a control command corresponding to each electro-optical conversion unit according to the detected wavelength information of each wavelength optical signal, so that each of the electro-optical conversion units selects a wavelength of the corresponding output optical signal according to the control command. Make adjustments.
  • an embodiment of the present invention further provides a photoelectric conversion method, which will be specifically described below by way of embodiments.
  • FIG. 6 is a schematic flow chart of a photoelectric conversion method according to an embodiment of the present invention. As shown in the figure, the implementation of this embodiment is as follows:
  • Step s601 the demultiplexing unit demultiplexes the received optical wavelength division multiplexed signal to be converted into a plurality of wavelength optical signals to be converted, and distributes and transmits each wavelength optical signal to be converted to a corresponding one of the photoelectric signals. In the conversion unit.
  • Step s602 the photoelectric conversion unit converts the optical signal to be converted from the branching unit into an electrical signal.
  • the electrical signal obtained by converting the optical signal by the photoelectric conversion unit is generally an optical signal in the form of a photo-generated current; each photoelectric conversion unit uniformly supplies a bias voltage by the same bias voltage generating circuit.
  • the sharing of the same bias voltage generating circuit by the respective photoelectric conversion units can effectively reduce the complexity of the electro-optical conversion module according to the embodiment of the present invention, improve the module integration degree, reduce the power consumption of the device, and improve the photoelectric conversion. The reliability of the module. Step s603, processing the electrical signal to obtain a service data electrical signal.
  • the electrical signal from the photoelectric conversion unit is an optical signal in the form of a relatively weak photo-generated current
  • the photo-generated current signal is an analog signal, which is not suitable for transmission on a channel
  • the step s603 The electrical signal is processed to amplify, sample, and recover the optical signal in the form of the photo-generated current to generate a high frequency traffic data signal suitable for channel transmission.
  • Step s604 The electrical interface unit outputs the service data electrical signal.
  • the electro-optical conversion module of the embodiment of the present invention receives the electrical signals to be converted by the electrical interface unit and distributes the electrical signals to be converted to each of the electro-optical conversion units, and the electro-optical conversion unit sends the electrical signals from the electrical interface unit.
  • the electrical signals are converted into optical signals, and the optical signals from each of the electro-optical conversion units are wavelength-multiplexed into one optical wavelength division multiplexed signal by a combining unit.
  • the photoelectric conversion module of the embodiment of the present invention demultiplexes the received optical wavelength division multiplexed signal to be converted into each wavelength optical signal to be converted, and the optical signal of each wavelength to be converted Distributing the distribution to a corresponding photoelectric conversion unit, converting the optical signal to be converted from the branching unit into an electrical signal by a photoelectric conversion unit, and transmitting an electrical signal from each of the photoelectric conversion units through an electrical interface unit Output.
  • the electro-optical conversion module, the photoelectric conversion module and the method provided by the embodiments of the invention realize electro-optical conversion of multi-channel electrical signals or photoelectric conversion of multi-channel optical signals in the same module, thereby effectively improving device integration and reducing
  • the small device size simplifies the internal fiber jumper complexity, reduces device power consumption, and improves device reliability.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
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  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Description

电光转换模块、 光电转换模块及转换方法 本申请要求于 2007 年 03 月 05 日提交中国专利局、 申请号为 200710027058.5、 发明名称为"电光转换模块、 光电转换模块及方法"的中国 专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及光通信领域， 具体来说涉及一种电光转换模块、 光电转换 模块及转换方法。 背景技术
随着光纤通信技术的逐步成熟， 波分复用（WDM, Wavelength Division Multiplexing ) 光传输系统已得到日益广泛的应用， 通过波分复用技术， 将 多个不同波长的光信号合成在一路信号 （波分复用）在光纤中传输， 有效 的提高了通信网络的传输带宽。
参考图 1 ,是现有技术的一种波分复用光传输系统中发送端设备的组成 示意图。 在所述发送端设备中， 包括了多块光口单板 11 , 多个用于对各路 电信号实现电光转换的电光转换模块 12 , 以及用于将来自所述每个电光转 换模块 12的各个波长光信号波分复用为一路光信号的合波板 13 ,所述每个 光口单板 11通过相应的光纤跳线将每路光信号传输连接到合波板 13。
参考图 2,是现有技术的一种波分复用光传输系统中接收端设备的组成 示意图。 在所述接收端设备中， 包括了用于将待转换的光波分复用信号解 复用为每个波长光信号的分波板 21 , 多个光口单板 22, 以及多个用于将每 路波长光信号转换为电信号的光电转换模块 23 , 所述分波板通过相应的光 纤跳线将每路光信号传输连接到各个光口单板 22。
在上述现有技术波分复用系统中， 对应每路待转换的电信号， 在发送 端设备中需要相应数量的光口单板以及光模块来实现对各路待转换电信号 的电光转换； 对应每路待转换的光信号， 在接收端设备中同样需要相应数 量的光口单板以及光模块来实现对各路待转换光信号的光电转换。 一般情 况下， 在波分复用系统的发送端和接收端设备中需要实现较大数量路数的 电信号转换或光信号转换， 因此， 在现有技术的波分复用系统发送端设备 或者接收设备中都需要较大数量的光口单板以及光模块实现相应的电光转 换或光电转换， 从而使得发送端或者接收端设备体积较大， 内部光纤跳线 数据较多且连接复杂， 不利于提高设备的集成度， 不利于降低设备功耗， 不利于简化操作维护。 发明内容
本发明实施例提供一种电光转换模块、 光电转换模块及转换方法， 可 在同一电光转换模块或光电转换模块中实现多路电信号的电光转换或多路 光信号的光电转换。
本发明实施例提供一种电光转换模块， 包括电接口单元、 与所述电接 口单元耦合的多个电光转换单元、 与所述多个电光转换单元耦合的合波单 元以及光接口单元， 其中：
电接口单元， 用于接收多路待转换的电信号， 并将其中每路待转换的 电信号传送到对应的电光转换单元中；
电光转换单元， 用于将来自所述电接口单元的电信号转换为光信号； 合波单元， 用于将来自所述每个电光转换单元的光信号波分复用为一 路光波分复用信号；
光接口单元， 用于将来自所述合波单元的光信号输出。
本发明实施例提供一种光电转换模块， 包括分波单元、 与所述分波单 元耦合的多个光电转换单元、 以及与所述多个光电转换单元耦合的电接口 单元， 其中：
分波单元， 用于将所接收到的待转换的光波分复用信号解复用为多路 待转换的波长光信号， 并将其中每路待转换的波长光信号传送到对应的光 电转换单元中；
光电转换单元， 用于将来自所述分波单元的所述待转换的波长光信号 转换为电信号；
电接口单元， 用于将来自所述每个光电转换单元的电信号输出。
本发明实施例提供的一种电光转换方法， 包括：
接收多路待转换的电信号， 并将其中各路待转换的电信号传送到对应 的电光转换单元中； 电光转换单元将所述待转换的电信号转换为光信号；
将来自所述每个电光转换单元的光信号波分复用为一路光波分复用信 号。
本发明实施例提供的另一种光电转换方法， 包括：
将所接收到的待转换的光波分复用信号解复用为多路待转换的波长光 信号， 并将其中每路待转换的波长光信号传送到对应的光电转换单元中； 光电转换单元将所述待转换的光信号转换为电信号。
本发明实施例中提供的电光转换模块， 通过电接口单元接收各路待转 换的电信号并将各路待转换的电信号分发传送到每个电光转换单元， 通过 电光转换单元将来自所述电接口单元的电信号转换为光信号， 以及通过合 波单元将来自所述每个电光转换单元的光信号波分复用为一路光波分复用 信号。 本发明实施例的光电转换模块通过分波单元将所接收到的待转换的 光波分复用信号解复用为待转换的每个波长光信号， 并将所述待转换的每 个波长光信号分发传送到相应的光电转换单元， 通过光电转换单元将来自 所述分波单元的所述待转换的光信号转换为电信号， 以及通过电接口单元 将来自所述每个光电转换单元的电信号输出。 通过本发明实施例提供的电 光转换模块、 光电转换模块及方法， 在同一模块中实现了对多路电信号的 电光转换或对多路光信号的光电转换， 有效的提高了设备集成度， 减小了 设备体积， 简化了内部光纤跳线复杂度， 降低了设备功耗， 提高了设备可 靠性。 附图说明
图 1是现有技术的一种波分复用系统中发送端设备的组成示意图； 图 2是现有技术的一种波分复用系统中接收端设备的组成示意图； 图 3是本发明实施例的一种电光转换模块组成示意图；
图 4是本发明实施例的一种光电转换模块组成示意图；
图 5是本发明实施例的一种电光转换方法的流程示意图；
图 6是本发明实施例的一种光电转换方法的流程示意图。 具体实施方式
为了使本发明实施例的技术方案及优点更加清楚明白， 下面结合附图 并举实施例对本发明实施例进行进一步详细说明。
参考图 3 ,是本发明实施例的一种电光转换模块组成示意图。如图所示， 本发明实施例所述的电光转换模块主要包括电接口单元 31、 与所述电接口 单元 31耦合的多个电光转换单元 32、 与所述多个电光转换单元 32耦合的 合波单元 33、 波长检测单元 34、 控制单元 35、 色散补偿单元 36、 以及光 接口 37。 下面对各单元功能及相互关系进行详细说明。
电接口单元 31 , 主要用于接收多路待转换的电信号， 并将其中每路待 转换的电信号分发传送到对应的一个电光转换单元 32中。
此处， 所述待转换的电信号为待转换的业务数据电信号， 所述电接口 单元 31实现了本发明实施例所述的电光转换模块与相应的物理宿板之间的 电气连接， 具体实施时， 所述电气连接包括电源馈电、 数字控制信号、 模 拟量信号、 待转换的业务数据电信号等。 由于本发明实施例所述的待转换 的电信号也即待转换的业务数据电信号为 RF高频信号，为了避免连接和传 输中变形和窜扰等对信号质量的影响， 本发明实施例所述的待转换业务数 据电信号等 RF高频信号在信号生成时一般需进行预加重处理，以实现在一 定程度上根据各路光信号传输信道的传输增益 （或衰耗）等特性预先对各 路光信号进行补偿， 具体实施时， 所述预加重处理过程和现有技术类似， 在此不以赘述。所述待转换业务数据电信号等 RF高频信号在传输过程中是 以差分微带线的形式传输的。 在一个具体实施例中， 所述电接口单元 31的 电插座接口传输信号分布结构如下表 1所示：
表 1
Figure imgf000006_0001
在上述表中， S代表 RF高频信号， gnd是参考地信号， 白色空白为其 他直流、 低频或电源等信号。 所述 RF高频信号分布具有以下特点： 两两相 邻成差分对， 差分对信号 （RF高频信号） 四周都是 gnd信号， 差分对之间 相隔至少两根插针， 相邻的差分对信号之间不形成相对关系。
电光转换单元 32,用于将来自所述电接口单元 31的电信号转换为光信 号。
此处， 所述电光转换单元 32接收到的电信号为高频业务数据信号， 由 于信号通道不可能是理想的宽带响应函数， 即信号通过的增益 （或衰减） 是随信号的频率变化而变化的， 且由于所述高频业务数据信号一般都是包 含有不同频率成分的， 经过通道传输后， 信号将会变形， 在电光转换之前， 需要对所述电信号进行均衡以及时钟数据恢复处理（CDR, Clock and data recover ), 其具体实现过程与现有技术类似， 故在此不再赘述。
合波单元 33 ,用于将来自所述每个电光转换单元 32的光信号波分复用 为一路光波分复用信号。
波长检测单元 34,用于检测来自所述合波单元 33的所述光波分复用信 号中每个波长光信号的波长信息， 以使所述控制单元 35根据检测到的每个 波长光信号的波长信息生成对应每个电光转换单元的控制命令， 进而使每 个电光转换单元 32根据控制命令对相应的输出光信号波长进行调节。
此处， 具体实施时， 所述波长检测控制单元 34主要包括：
分光器 341 , 用于将来自所述合波单元 33的所述光波分复用信号分成 第一路光波分复用信号和第二路光波分复用信号。
波长检测器 342,用于检测来自所述分光器 341的所述第二路光波分复 用信号中每个波长光信号的波长信息。
控制单元 35 , 用于对所述每个电光转换单元的输出光信号波长进行调 节控制。
此处， 在具体实施时， 所述控制单元 35—般包括一微处理器（MCU ), 主要用于对所述每个电光转换单元的光信号输出波长、 输出功率等参数进 行控制。 如在实现对每个电光转换单元的光信号输出波长进行控制时， 所 述控制单元 35通过对所述波长检测单元 34所检测到的每个波长光信号的 波长信息进行釆样放大以及模数 AD转换为对应每个电光转换单元 32输出 波长信息的数字信号， 所述微处理器 （MCU )通过将所述每个电光转换单 元 32输出波长信息的数字信号与预先标定的数据进行比较并根据比较结果 生成用于控制相应的电光转换单元 32增加、 不变或者减小其输出波长的控 制命令。 类似所述波长控制的还有每个电光转换单元 32的输出光功率、 消 光比、 交叉点等电光调制参数， 其具体实现过程及功能均以现有技术相同 或类似， 故在此不再赘述。
色散补偿单元 36, 与所述分光器连接， 用于将来自所述分光器 341的 所述第一路光波分复用信号进行色散补偿。
此处， 所述色散补偿过程与现有技术相同或类似， 在此不以赘述。 光接口 37 , 用于将来自所述色散补偿单元 36的光信号输出。
综合以上描述可知， 本发明实施例所述的电光转换模块实现了在同一 模块中对多路电信号的光电转换， 并将光电转换后的每路光信号通过一合 波单元进行波分复用后经同一光接口通过光纤输出， 从而有效的提高了电 光转换设备的集成度， 减少了电光转换设备光纤跳线数量， 降低电光转换 设备功耗， 减小了电光转换设备体积， 提高了电光转换设备可靠性。
参考图 4, 是本发明实施例的一种光电转换模块组成示意图。 如图所示 本发明实施例所述的光电转换模块主要包括分波单元 41、 与所述分波单元 耦合的多个光电转换单元 42、偏置电压产生电路 43、多个信号处理单元 44、 以及与所述多个信号处理单元耦合的电接口单元 45。 下面对各个单元功能 及相互关系进行详细描述。
分波单元 41 , 用于将所接收到的待转换的光波分复用信号解复用为多 路待转换的波长光信号， 并将其中每路待转换的波长光信号分发传送到对 应的一个光电转换单元中。
光电转换单元 42, 用于将来自所述分波单元的所述待转换的光信号转 换为电信号。
此处， 所述光电转换单元将所述光信号转换后获得的电信号一般为光 生电流形式的光信号。
偏置电压产生电路 43， 用于为所述每个光电转换单元提供偏置电压。 此处， 所述偏置电压产生电路 43统一为所述每个光电转换单元提供偏 置电压， 各个光电转换单元共用同一偏置电压产生电路能有效的减小本发 明实施例所述的光电转换模块的复杂度， 提高了模块集成度， 减小了设备 功耗， 有利于提高电光转换模块的可靠性。
信号处理单元 44,用于对来自所述光电转换单元 42的所述电信号进行 处理以获取业务数据电信号。
此处， 由于来自所述光电转换单元 42的所述电信号为相对比较微弱的 光生电流形式的光信号， 且该光生电流信号为模拟信号， 不适合于在信道 上传输， 所述信号处理单元 44的主要作用是将该光生电流形式的光信号进 行放大、 釆样及时钟数据恢复， 从而生成适合于信道传输的高频业务数据 信号。 具体实施时， 所述信号处理单元 44 包括跨阻放大器 （TIA , Transimpedance Amplifier ), 限幅放大器 ( Limiting Amplifier )和时钟数据恢 复 ( CDR, Clock and data recover )等。
电接口单元 45 ,用于将来自每个信号处理单元 44的业务数据电信号输 出。
此处， 所述电接口单元 45实现的功能及结构与本发明实施例所描述的 电光转换模块中所述电接口单元 32是类似的。 所述电接口单元 45的电插 座接口传输信号的结构分布与所述电接口单元 32的插座接口传输信号的结 构分布是相同或类似的， 在此不予赘述。 各个信号处理单元汇总输出到所 述电接口单元 45的插座接口以及所述电接口单元 45的插座接口与相应的 宿板之间的业务数据电信号等 RF 高频信号均是以差分微带线的形式传输 的。
综合以上描述可知， 本发明实施例所述的光电转换模块实现了在同一 模块中将待转换的光波分复用信号解复用为多路波长光信号， 并将其中每 路波长光信号转换为电信号后经同一电插座接口通过差分微带线输出， 从 而有效的提高了光电转换设备的集成度， 减少了光电转换设备光纤跳线数 量， 降低光电转换设备功耗， 减小了光电转换设备体积， 提高了光电转换 设备可靠性。
另外， 本发明实施例还提供了一种电光转换方法， 下面通过实施例对 其进行具体描述。
参考图 5 , 是本发明实施例的一种电光转换方法的流程示意图。 如图所 示， 该实施例实施过程如下：
步骤 s501 , 电接口单元接收多路待转换的电信号， 并将其中每路待转 换的电信号分发传送到对应的一个电光转换单元中。
此处， 所述待转换的电信号为待转换的业务数据电信号， 所述电接口 单元实现了本发明实施例所述的电光转换模块与相应的物理宿板之间的电 气连接， 具体实施时， 所述电气连接包括电源馈电、 数字控制信号、 模拟 量信号、 待转换的业务数据电信号等。 由于本发明实施例所述的待转换的 电信号也即待转换的业务数据电信号信号为 RF高频信号，为了避免连接和 传输中变形和窜扰等对信号质量的影响， 本发明实施例所述的待转换业务 数据电信号等 RF高频信号在信号生成时一般需进行预加重处理，以实现在 一定程度上根据各路光信号传输信道的传输增益 （或衰耗） 等特性预先对 各路光信号进行补偿， 具体实施时， 所述预加重处理过程和现有技术类似， 在此不予赘述。所述待转换业务数据电信号等 RF高频信号在传输过程中是 以差分微带线的形式传输的。 在一个具体实施例中， 所述电接口单元的插 座接口传输信号分布结构如下表 2所示：
表 2
Figure imgf000010_0001
在上述表中， S代表 RF高频信号， gnd是参考地信号， 白色空白为其 他直流、 低频或电源等信号。 所述 RF高频信号分布具有以下特点： 两两相 邻成差分对， 差分对信号 （RF高频信号） 四周都是 gnd信号， 差分对之间 相隔至少两根插针， 相邻的差分对信号之间不形成相对关系。
步骤 s502 , 电光转换单元将来自所述电接口单元的待转换的电信号转 换为光信号。
此处， 所述电光转换单元接收到的电信号为高频业务数据信号， 由于 信号通道不可能是理想的宽带响应函数， 即信号通过的增益 （或衰减）是 随信号的频率变化而变化的， 且由于所述高频业务数据信号一般都是包含 有不同频率成分的， 经过通道传输后， 信号将会变形， 在电光转换之前， 需要对所述电信号进行均衡以及时钟数据恢复处理（CDR ), 其具体实现过 程与现有技术类似， 故在此不再赘述。
步骤 s503 , 合波单元将来自所述每个电光转换单元的光信号波分复用 为一路光波分复用信号。
步骤 s504 , 将来自所述合波单元的所述光波分复用信号分成第一路光 波分复用信号和第二路光波分复用信号。
步骤 s505 , 对所述第一路光波分复用信号进行色散补偿并输出； 检测 所述第二路光波分复用信号中每个波长光信号的波长信息。
此处， 所述色散补偿过程与现有技术类似， 在此不以赘述。
步骤 s506 , 根据所述检测到的每个波长光信号的波长信息生成对应每 个电光转换单元的控制命令， 以使所述每个电光转换单元根据所述控制命 令对相应的输出光信号的波长进行调节。
相应地， 本发明实施例还提供了一种光电转换方法， 下面通过实施例 对其进行具体描述。
参考图 6 , 是本发明实施例的一种光电转换方法的流程示意图。 如图所 示， 该实施例实施过程如下：
步骤 s601 , 分波单元将所接收到的待转换的光波分复用信号解复用为 多路待转换的波长光信号， 并将其中每路待转换的波长光信号分发传送到 对应的一个光电转换单元中。
步骤 s602 , 光电转换单元将来自所述分波单元的待转换的光信号转换 为电信号。
此处， 所述光电转换单元将所述光信号转换后获得的电信号一般为光 生电流形式的光信号； 各个光电转换单元由同一偏置电压产生电路统一提 供偏置电压。 所述各个光电转换单元共用同一偏置电压产生电路能有效的 减小本发明实施例所述的电光转换模块的复杂度， 提高了模块集成度， 减 小了设备功耗， 有利于提高光电转换模块的可靠性。 步骤 s603 , 对所述电信号进行处理以获取业务数据电信号。 此处， 由于来自所述光电转换单元的所述电信号为相对比较微弱的光 生电流形式的光信号， 且该光生电流信号为模拟信号， 不适合于在信道上 传输， 所述步骤 s603中对所述电信号进行处理为将所述光生电流形式的光 信号进行放大、 釆样及时钟数据恢复， 从而生成适合于信道传输的高频业 务数据信号。
步骤 s604 , 电接口单元输出所述业务数据电信号。
本发明实施例的电光转换模块通过电接口单元接收各路待转换的电信 号并将各路待转换的电信号分发传送到每个电光转换单元， 通过电光转换 单元将来自所述电接口单元的电信号转换为光信号， 以及通过合波单元将 来自所述每个电光转换单元的光信号波分复用为一路光波分复用信号。 本 发明实施例的光电转换模块通过分波单元将所接收到的待转换的光波分复 用信号解复用为待转换的每个波长光信号， 并将所述待转换的每个波长光 信号分发传送到相应的光电转换单元， 通过光电转换单元将来自所述分波 单元的所述待转换的光信号转换为电信号， 以及通过电接口单元将来自所 述每个光电转换单元的电信号输出。 通过本发明实施例提供的电光转换模 块、 光电转换模块及方法， 在同一模块中实现了对多路电信号的电光转换 或对多路光信号的光电转换， 有效的提高了设备集成度， 减小了设备体积， 简化了内部光纤跳线复杂度， 降低了设备功耗， 提高了设备可靠性。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的 普通技术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进 和润饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种电光转换模块， 其特征在于， 包括电接口单元、 与所述电接口 单元耦合的多个电光转换单元、 与所述多个电光转换单元耦合的合波单元 以及光接口单元， 其中：
电接口单元， 用于接收多路待转换的电信号， 并将其中每路待转换的 电信号传送到对应的电光转换单元中；
电光转换单元， 用于将来自所述电接口单元的电信号转换为光信号； 合波单元， 用于将来自所述每个电光转换单元的光信号波分复用为一 路光波分复用信号；
光接口单元， 用于将来自所述合波单元的光信号输出。
2、 如权利要求 1所述的电光转换单元， 其特征在于， 还包括： 波长检测单元， 用于检测来自所述合波单元的所述光波分复用信号中 每个波长光信号的波长信息；
控制单元， 用于对所述电光转换单元的输出光信号波长进行调节控制； 所述控制单元根据所述波长检测单元检测到的每个波长光信号的波长信息 对相应的输出光信号波长进行调节。
3、 如权利要求 2所述的电光转换单元， 其特征在于， 所述波长检测单 元包括：
分光器， 用于将来自所述合波单元的光波分复用信号分成第一路光波 分复用信号和第二路光波分复用信号；
波长检测器， 用于检测来自所述分光器的第二路光波分复用信号中每 个波长光信号的波长信息。
4、 如权利要求 3所述的电光转换模块， 其特征在于， 进一步包括： 色散补偿单元， 与所述分光器连接， 用于对来自所述分光器的第一路 光波分复用信号进行色散补偿；
所述光接口单元将来自所述色散补偿单元的光信号输出。
5、 如权利要求 1至 4任一项所述的电光转换模块， 其特征在于， 所述电接口单元包括用于接收多路电信号的电插座接口， 在所述插座 接口中， 所述待转换的各路电信号的接入插脚两两相邻， 使所述各路电信 号两两组成差分对信号， 与所述组成差分对的电信号接入插脚四周相邻的 插脚为接地信号插脚， 且所述组成差分对的电信号接入插脚之间至少相隔 两根插脚。
6、 一种光电转换模块， 其特征在于， 包括分波单元、 与所述分波单元 耦合的多个光电转换单元、 以及与所述多个光电转换单元耦合的电接口单 元， 其中：
分波单元， 用于将所接收到的待转换的光波分复用信号解复用为多路 待转换的波长光信号， 并将其中每路待转换的波长光信号传送到对应的光 电转换单元中；
光电转换单元， 用于将来自所述分波单元的所述待转换的波长光信号 转换为电信号；
电接口单元， 用于将来自所述每个光电转换单元的电信号输出。
7、 如权利要求 6所述的光电转换模块， 其特征在于， 还包括： 偏置电压产生电路， 用于为所述每个光电转换单元提供偏置电压。
8、 如权利要求 6或 7所述的光电转换模块， 其特征在于， 还包括： 信号处理单元， 用于对来自所述光电转换单元的电信号进行处理以获 取与电接口单元适配的电信号。
9、 如权利要求 6或 7所述的光电转换模块， 其特征在于，
所述电接口单元包括用于输出多路电信号的电插座接口， 在所述插座 接口中， 所述待转换的各路电信号的接入插脚两两相邻， 使所述各路电信 号两两组成差分对信号， 与所述组成差分对的电信号接入插脚四周相邻的 插脚为接地信号插脚， 且所述组成差分对的电信号接入插脚之间至少相隔 两根插脚。
10、 一种电光转换方法， 其特征在于， 包括：
接收多路待转换的电信号， 并将其中各路待转换的电信号传送到对应 的电光转换单元中；
电光转换单元将所述待转换的电信号转换为光信号；
将来自所述每个电光转换单元的光信号波分复用为一路光波分复用信 号。
11、 如权利要求 10所述的方法， 其特征在于， 还包括：
检测所述光波分复用信号中每个波长光信号的波长信息， 并根据检测 到的每个波长光信号的波长信息对相应的输出光信号波长进行调节。
12、 一种光电转换方法， 其特征在于， 包括：
将所接收到的待转换的光波分复用信号解复用为多路待转换的波长光 信号， 并将其中每路待转换的波长光信号传送到对应的光电转换单元中； 光电转换单元将所述待转换的光信号转换为电信号。
13、 如权利要求 12所述的方法， 其特征在于， 还包括：
对来自所述光电转换单元的电信号进行处理， 使其与电接口单元适配。
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