CN205123746U - Remote optical fiber transmission amplification device of multi -wavelength - Google Patents
Remote optical fiber transmission amplification device of multi -wavelength Download PDFInfo
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- CN205123746U CN205123746U CN201520700158.XU CN201520700158U CN205123746U CN 205123746 U CN205123746 U CN 205123746U CN 201520700158 U CN201520700158 U CN 201520700158U CN 205123746 U CN205123746 U CN 205123746U
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Abstract
本实用新型公开了一种多波长远距离光纤传输放大装置，属于光纤传感中继放大技术领域，该装置包括信号源、合波器、遥泵放大器、环形器、拉曼放大器、分波器、接收器以及连接光纤信号源的输出端与合波器的输入端相连，合波器的输出端与分路器的输入端相连，分路器的输出端分别与遥泵放大单元发送端和拉曼放大单元发送端的输入端相连，遥泵放大单元发送端与遥泵增益单元、遥泵泵浦单元和遥泵放大单元接收端依次连接，拉曼放大单元发送端与拉曼放大单元接收端连接，放大单元接收端和拉曼放大单元接收端的输出端分别与信号选择器的输入端相连，信号选择器输出端与分波器的输入端相连，分波器的输出端与信号接收器相连，将遥泵放大器和拉曼放大器放置在传感光纤中，可以放大经传感光纤损耗的激光，增强了后段传感光纤中自发后向散射光的强度。
The utility model discloses a multi-wavelength long-distance optical fiber transmission amplification device, which belongs to the technical field of optical fiber sensing relay amplification, and the device includes a signal source, a wave combiner, a remote pump amplifier, a circulator, a Raman amplifier, and a wave splitter , the receiver and the output end connected to the optical fiber signal source are connected to the input end of the multiplexer, the output end of the multiplexer is connected to the input end of the splitter, and the output end of the splitter is respectively connected to the sending end of the remote pump amplifier unit and the The input end of the sending end of the Raman amplifying unit is connected, the sending end of the remote pump amplifying unit is connected with the remote pump gain unit, the remote pumping unit and the receiving end of the remote pump amplifying unit in sequence, the sending end of the Raman amplifying unit is connected with the receiving end of the Raman amplifying unit Connection, the receiving end of the amplifying unit and the output end of the receiving end of the Raman amplifying unit are respectively connected to the input end of the signal selector, the output end of the signal selector is connected to the input end of the wave splitter, and the output end of the wave splitter is connected to the signal receiver , the remote pump amplifier and Raman amplifier are placed in the sensing fiber, which can amplify the laser light lost by the sensing fiber, and enhance the intensity of the spontaneous backscattered light in the rear sensing fiber.
Description
Technical field
The utility model relates to Fibre Optical Sensor relaying amplifying technique field, particularly relates to the remote fiber transmission device of a kind of multi-wavelength.
Background technology
In distributed fiberoptic sensor, the distributed fiberoptic sensor that the principle utilizing optical fiber spontaneous scattering luminous intensity to modulate by temperature, stress, vibration etc. and optical time domain reflection principle are made, has wide application market.Because luminous power when light transmits in a fiber loss can occur, and be subject to the restriction of sensing system signal to noise ratio, measure length and can not satisfy the demand always.
In the particular application of undersea transmission or land, due to natural conditions restriction, active relaying and supervisory control system cannot be set up in transmission link; Or operator cannot be born for the operation and maintenance expense after use active relaying, at this moment multi-wavelength single span transmission span just must be increased.At present in long haul transmission system, main employing has Raman amplifiction technology, namely at receiving terminal reverse coupled pump light or at transmitting terminal coupling pumping light in the same way, utilizes the Raman effect of optical fiber to amplify signal; Another kind method adopts distant pump amplifying technique, namely optical fiber is placed in transmission link, and pumping source amplifies transmitting terminal or receiving terminal, and pump light is coupled to optical fiber and amplifies signal after transmission.
In prior art, the gain that the shortcoming of Raman amplifiction technology mainly provides is less, generally only has 4 ~ 11dB, can not meet longer transmission span requirement; Distant pump amplifying technique, when providing high-gain, is difficult to control amplifier gain flatness, causes each channel performance widely different, limit the further raising of transmission span.
Summary of the invention
In order to compensate the luminous power of loss in Transmission Fibers, increase the distance of transmission ray, the utility model provides a kind of gain high and the multi-wavelength long distance transmitter that performance is good.
The purpose of this utility model is achieved in that the remote Optical Fiber Transmission amplifying device of a kind of multi-wavelength, it is characterized in that: this device is by signal source, wave multiplexer, splitter, and distant pump amplifying unit, circulator, Raman amplifiction unit, signal selector, channel-splitting filter, receiver and connecting fiber form;
Wherein connecting fiber is optical fiber, and said units connecting fiber connects;
Distant pump amplifying unit comprises distant pump amplifying unit transmitting terminal, distant pump gain unit, distant pump pump unit and distant pump amplifying unit receiving terminal, pump unit is at least one Pu source wavelength is the pumping laser of 1480nm, adopt Pumped, backward pumping or two directional pump mode, transfer to optical fiber by distant pump amplifying unit receiving terminal and signal is amplified;
Raman amplifiction unit comprises Raman amplifiction unit transmitting terminal and Raman amplifiction unit receiving terminal, and at least one Pu source wavelength is the pumping laser of 1400nm ~ 1500nm, transfers to optical fiber amplify signal by Raman amplifiction unit receiving terminal;
The output of signal source is connected with the input of wave multiplexer, the output of wave multiplexer is connected with the input of splitter, the output of splitter is connected with the input of Raman amplifiction unit transmitting terminal with distant pump amplifying unit transmitting terminal respectively, distant pump amplifying unit transmitting terminal and distant pump gain unit, distant pump pump unit is connected successively with distant pump amplifying unit receiving terminal, Raman amplifiction unit transmitting terminal is connected with Raman amplifiction unit receiving terminal, amplifying unit receiving terminal is connected with the input of signal selector respectively with the output of Raman amplifiction unit receiving terminal, signal selector output is connected with the input of channel-splitting filter, the output of channel-splitting filter is connected with signal receiver.
The multichannel different wave length signal that signal source is launched is multiplexed into a road signal through wave multiplexer, is divided into two into the identical signal of two-way again, is sent to distant pump amplifying unit and Raman amplifiction unit respectively through splitter; Signal selector is adjudicated two paths of signals, and by quality, riches all the way preferably delivers to channel-splitting filter, and the signal that channel-splitting filter demultiplexes the signal into multichannel different wave length again delivers to signal receiver.
When light transmits in a fiber, can there is loss in luminous power, and thus, the distance sensing of optical fiber can be restricted.After embedding remote optical pumping amplifier and Raman amplifiction unit in the junction of optical fiber, light enters in image intensifer by fiber coupler, the laser of loss is enlarged into original luminous power in image intensifer, the combination of remote optical pumping amplifier and Raman amplifiction unit can embed N number of smooth sensing relay amplifying device in the junction of optical fiber, realizes the Fibre Optical Sensor of N × L distance.
The beneficial effects of the utility model are: the multichannel different wave length signal that signal source is launched is multiplexed into a road signal through wave multiplexer, is divided into two into the identical signal of two-way again, is sent to distant pump amplifying unit and Raman amplifiction unit respectively through splitter; Signal selector is adjudicated two paths of signals, and by quality, riches all the way preferably delivers to channel-splitting filter, and the signal that channel-splitting filter demultiplexes the signal into multichannel different wave length again delivers to signal receiver.Like this, when selecting the laser diode pump pumping wavelength of pumping source of Raman amplifiction unit, the gain of Raman amplifiction unit can form complementation to the gain of remote optical pumping amplifier pointedly, device is made to obtain the gain spectral of relatively flat on the whole, promote transmission performance, optimize multi-wavelength single span transmission performance, do not need to adopt pre-emphasis technique to carry out optimization system by the transmitted power reducing large gain channel, equilibrium is carried out to each channel power, therefore, the utility model cost is low, and gain is high and performance good.
Accompanying drawing explanation
Fig. 1 is multi-wavelength remote Optical Fiber Transmission amplifying device structural representation.
Embodiment
The utility model provides a kind of multi-wavelength remote Optical Fiber Transmission amplifying device structural representation, further illustrates embodiment of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, the remote Optical Fiber Transmission amplifying device of a kind of multi-wavelength, this device is by signal source 1, wave multiplexer 2, splitter 3, and distant pump amplifying unit 4, Raman amplifiction unit 5, signal selector 6, channel-splitting filter 7, receiver 8 and connecting fiber form;
Wherein connecting fiber is optical fiber, and said units connecting fiber connects;
Distant pump amplifying unit 4 comprises distant pump amplifying unit transmitting terminal 10, distant pump gain unit 11, distant pump pump unit 12 and distant pump amplifying unit receiving terminal 13, distant pump pump unit 12 is at least one Pu source wavelength is the pumping laser of 1480nm, adopt Pumped, backward pumping or two directional pump mode, transfer to optical fiber by distant pump amplifying unit receiving terminal 13 and signal is amplified;
Raman amplifiction unit 5 comprises Raman amplifiction unit transmitting terminal 14 and Raman amplifiction unit receiving terminal 15, and at least one Pu source wavelength is the pumping laser of 1400nm ~ 1500nm, transfers to optical fiber amplify signal by Raman amplifiction unit receiving terminal 15;
The output of signal source 1 is connected with the input of wave multiplexer 2, the output of wave multiplexer 2 is connected with the input of splitter 3, the output of splitter 3 is connected with the input of Raman amplifiction unit transmitting terminal 14 with distant pump amplifying unit transmitting terminal 10 respectively, distant pump amplifying unit transmitting terminal 10 and distant pump gain unit 11, distant pump pump unit 12 is connected successively with distant pump amplifying unit receiving terminal 13, Raman amplifiction unit transmitting terminal 14 is connected with Raman amplifiction unit receiving terminal 15, distant pump amplifying unit receiving terminal 13 is connected with the input of signal selector respectively with the output of Raman amplifiction unit receiving terminal 15, signal selector output is connected with the input of channel-splitting filter 7, the output of channel-splitting filter 7 is connected with signal receiver 8.
The multichannel different wave length signal that signal source 1 is launched is multiplexed into a road signal through wave multiplexer 2, is divided into two into the identical signal of two-way again, is sent to distant pump amplifying unit 4 and Raman amplifiction unit 5 respectively through splitter 3; Signal selector is adjudicated two paths of signals, and by quality, riches all the way preferably delivers to channel-splitting filter 7, and the signal that channel-splitting filter 7 demultiplexes the signal into multichannel different wave length again delivers to signal receiver 8.
Here description of the present utility model and application is illustrative, not wants by scope restriction of the present utility model in the above-described embodiments.Distortion and the change of embodiment disclosed are here possible, are known for the replacement of embodiment those those of ordinary skill in the art and the various parts of equivalence.Those skilled in the art are noted that when not departing from spirit of the present utility model or substantive characteristics, and the utility model with other forms, structure, layout, ratio, and can realize with other elements, material and parts.When not departing from the utility model scope and spirit, can other distortion be carried out here to disclosed embodiment and change.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520700158.XU CN205123746U (en) | 2015-09-10 | 2015-09-10 | Remote optical fiber transmission amplification device of multi -wavelength |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520700158.XU CN205123746U (en) | 2015-09-10 | 2015-09-10 | Remote optical fiber transmission amplification device of multi -wavelength |
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| CN201520700158.XU Expired - Fee Related CN205123746U (en) | 2015-09-10 | 2015-09-10 | Remote optical fiber transmission amplification device of multi -wavelength |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294604A (en) * | 2017-05-26 | 2017-10-24 | 烽火通信科技股份有限公司 | A kind of single span long-distance WDM circuit optical fiber Transmission system |
| CN109245825A (en) * | 2018-05-25 | 2019-01-18 | 四川泰富地面北斗科技股份有限公司 | The big flow Transmission system and method for a kind of more homogeneities of co-wavelength with long optical fibers |
| CN111721994A (en) * | 2020-06-19 | 2020-09-29 | 贵州江源电力建设有限公司 | Distributed voltage detection system for high-voltage transmission line |
| CN116256081A (en) * | 2023-03-13 | 2023-06-13 | 上海习荣电力设备有限公司 | Optical fiber temperature measurement monitoring system |
-
2015
- 2015-09-10 CN CN201520700158.XU patent/CN205123746U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294604A (en) * | 2017-05-26 | 2017-10-24 | 烽火通信科技股份有限公司 | A kind of single span long-distance WDM circuit optical fiber Transmission system |
| CN109245825A (en) * | 2018-05-25 | 2019-01-18 | 四川泰富地面北斗科技股份有限公司 | The big flow Transmission system and method for a kind of more homogeneities of co-wavelength with long optical fibers |
| CN111721994A (en) * | 2020-06-19 | 2020-09-29 | 贵州江源电力建设有限公司 | Distributed voltage detection system for high-voltage transmission line |
| CN111721994B (en) * | 2020-06-19 | 2022-09-06 | 贵州江源电力建设有限公司 | Distributed voltage detection system for high-voltage transmission line |
| CN116256081A (en) * | 2023-03-13 | 2023-06-13 | 上海习荣电力设备有限公司 | Optical fiber temperature measurement monitoring system |
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