CN206670822U - It is used for the system of distributed satellite systems in a kind of overlength optical cable - Google Patents
It is used for the system of distributed satellite systems in a kind of overlength optical cable Download PDFInfo
- Publication number
- CN206670822U CN206670822U CN201720152015.9U CN201720152015U CN206670822U CN 206670822 U CN206670822 U CN 206670822U CN 201720152015 U CN201720152015 U CN 201720152015U CN 206670822 U CN206670822 U CN 206670822U
- Authority
- CN
- China
- Prior art keywords
- mode fiber
- frequency domain
- coherent light
- detection system
- light frequency
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of system for being used for distributed satellite systems in overlength optical cable, including the first Raman coherent light frequency domain detection system, the second Raman coherent light frequency domain detection system, up single-mode fiber, descending single-mode fiber and repeater, described up single-mode fiber and descending single-mode fiber both ends are connected with the first Raman coherent light frequency domain detection system and the second Raman coherent light frequency domain detection system respectively；The direct impulse light of first Raman coherent light frequency domain detection system and the second Raman coherent light frequency domain detection system is in the inside of up single-mode fiber and descending single-mode fiber；Repeater is mounted in described up single-mode fiber and each segmentation of descending single-mode fiber；The temperature survey resolution ratio that solves traditional long-distance optical fiber group is low, snr loss is big, and can cause backscatter signals can not be by along backtracking, so that the problem of being difficult to detect scattered light signal using isolator.
Description
Technical field
The present invention relates to the system for being used for distributed satellite systems in a kind of overlength optical cable, and in particular to a kind of optical cable temperature
System, repeater and the communication system of monitoring, belong to fiber optic cable monitor technical field.
Background technology
In extra long distance cable system, the temperature of monitoring system can be important, because temperature affects the biography of optical cable
Defeated situation and service life.Known monitoring temperature method is set including the use of Raman coherent light time domain reflection measure (R-COTDR)
When standby and technology, but in technique, input optical fibre is pulsed light, its spatial resolution and signal to noise ratio, dynamic range, measurement
Between between there is contradiction.
In more detail, to improve the spatial resolution of measurement must just reduce pulsewidth, and the pulsewidth of pulsed light is narrower, input
The optical pulse energy of optical fiber is lower, and it is also wider to measure required bandwidth, and energy reduces and Measurement bandwidth increase can all make system
Signal to noise ratio be deteriorated, so the measurement required time will be significantly elongated.R-COTDR using continuous light, such system
Signal to noise ratio is just and spatial resolution is not related, it is possible to improves spatial resolution in the case where not losing signal to noise ratio.
In recent years, with the gradual development of dense wavelength division multiplexing technology and erbium-doped fiber amplifier (EDFA) technology, in
It is also progressively ripe after technology, therefore data throughout is remarkably improved, it has been widely applied.Cores of the EDFA as repeater
Heart element, isolator is generally used, to prevent that reflected light inversely amplifies the infringement to caused by EDFA in circuit, but use isolation
Device can cause backscatter signals can not be by along backtracking, so that be difficult to detect scattered light signal.
The content of the invention
The technical problem to be solved in the present invention is to provide the system for being used for distributed satellite systems in a kind of overlength optical cable, profit
The temperature survey for solving traditional long-distance optical fiber group with the system for being used for distributed satellite systems in a kind of overlength optical cable is differentiated
Rate is low, snr loss is big, and can cause backscatter signals can not be by along backtracking, so that be difficult to detect using isolator
The problem of scattered light signal.
The technical scheme of the offer of the present invention is a kind of system for being used for distributed satellite systems in overlength optical cable of offer,
Including the first Raman coherent light frequency domain detection system, the second Raman coherent light frequency domain detection system, up single-mode fiber, descending list
Mode fiber and repeater, described up single-mode fiber and descending single-mode fiber both ends are examined with the first Raman coherent light frequency domain respectively
Examining system and the connection of the second Raman coherent light frequency domain detection system；First Raman coherent light frequency domain detection system and the second Raman phase
The direct impulse light of dry optical frequency domain detecting system is in the inside of up single-mode fiber and descending single-mode fiber；Described up single mode
Repeater is mounted in optical fiber and each segmentation of descending single-mode fiber.
Described repeater includes the first image intensifer, the second image intensifer, the first loopback passage and the second loopback passage,
Described the first image intensifer and the second image intensifer is connected by the first loopback passage and the second loopback passage and forms ring-type
Structure.
Described up single-mode fiber and descending single-mode fiber are respectively to include the optical fiber of more than one.
Using technical scheme provide it is a kind of in overlength optical cable for distributed satellite systems system and
Method, operationally, using Raman coherent light frequency domain detection system（R-COFDR）, R-COFDR and single-mode fiber are connected
Connect, described single-mode fiber is that optical cable carries, and R-COFDR direct impulse light is injected into single-mode fiber, and collect single mode
Back scattering Raman optical signal in optical fiber, to obtain the temperature information of every bit along the optical fiber under a large amount of optical cable normal operations.
The repeater of the present invention leads to including the first image intensifer, the second image intensifer, the first loopback passage and the second loopback
Road, the first described image intensifer and the second image intensifer are connected by the first loopback passage and the second loopback passage and form ring
Shape structure, the repeater package provided are led to containing the first image intensifer, the second image intensifer, the first loopback passage and the second loopback
Road, the first image intensifer and the second image intensifer all have input and output, and are all used for the amplification to optical signal, the first ring
Passage is returned to be used to the Raman Back Scattering light in downlink introducing uplink, and by second image intensifer, it is right
Optical signal transmission and amplification, the R-COFDR positioned at initial end is then entered by uplink, completes the number to optical signal
According to processing and detection.Second loopback passage is used to the Raman Back Scattering light in uplink introducing downlink, and passes through
First image intensifer, to optical signal transmission and amplification, then amplified step by step by the multistage EDFA in uplink,
Into the R-COFDR positioned at right-hand member, the data processing and detection to optical signal are completed, and then draw required temperature value.
The up single-mode fiber and descending single-mode fiber of the present invention has respectively extremely respectively to comprise at least the optical fiber of more than one
A few up single-mode fiber and descending single-mode fiber, you can composition optical fiber circuit, be more suitable for multifiber and combine.
Compared with prior art, without using isolator, it is possible to be enough in the optical cable that there are long repeater span
R-COFDR is monitored, high resolution, and snr loss is small.
In summary, using in a kind of overlength optical cable be used for distributed satellite systems system can solve traditional length away from
It is low from the temperature survey resolution ratio of optical fiber group, snr loss is big, and can cause backscatter signals can not be by using isolator
Along backtracking, so that the problem of being difficult to detect scattered light signal.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the repeater structure figure of the present invention；
Description of reference numerals：1st, the first Raman coherent light frequency domain detection system, 2, repeater, 3, descending single-mode fiber, 4,
Up single-mode fiber, the 5, second Raman coherent light frequency domain detection system, the 21, first image intensifer, the 22, second image intensifer, 23,
Second loopback passage, the 24, first loopback passage.
Embodiment
Below in conjunction with the accompanying drawings and invention is described further specific embodiment：
As shown in Fig. 1~2, a kind of system for being used for distributed satellite systems in overlength optical cable, including the first Raman phase
Dry optical frequency domain detecting system 1, the second Raman coherent light frequency domain detection system 5, up single-mode fiber 4, descending single-mode fiber 3 and in
After device 2, up single-mode fiber 4 and descending single-mode fiber 3 both ends respectively with the first Raman coherent light frequency domain detection system 1 and second
Raman coherent light frequency domain detection system 5 connects；First Raman coherent light frequency domain detection system 1 and the inspection of the second Raman coherent light frequency domain
The direct impulse light of examining system 5 is in the inside of up single-mode fiber 4 and descending single-mode fiber 3；Up single-mode fiber 4 and descending list
Repeater 2 is mounted in 3 each segmentation of mode fiber.
Further repeater 2 includes the first image intensifer 21, the second image intensifer 22, the first loopback passage 24 and second
Loopback passage 23, the first described image intensifer 21 and the second image intensifer 22 are led to by the first loopback passage 24 and the second loopback
Road 23 is connected and forms cyclic structure, and the repeater package provided is led to containing the first image intensifer, the second image intensifer, the first loopback
Road and the second loopback passage, the first image intensifer and the second image intensifer all have input and output, and are all used to believe light
Number amplification, the first loopback passage is used to the Raman Back Scattering light in downlink introducing uplink, and by described
Second image intensifer, to optical signal transmission and amplification, the R-COFDR positioned at initial end is then entered by uplink,
Complete the data processing and detection to optical signal.Second loopback passage is used to introduce the Raman Back Scattering light in uplink
Downlink, and by first image intensifer, to optical signal transmission and amplification, then pass through the multistage in uplink
EDFA is amplified step by step, into the R-COFDR positioned at right-hand member, completes the data processing and detection to optical signal, and then
Draw required temperature value.
Further up single-mode fiber 4 and descending single-mode fiber 3 have respectively at least respectively to include the optical fiber of more than one
A piece up single-mode fiber and descending single-mode fiber, you can composition optical fiber circuit, be more suitable for multifiber and combine.
A kind of system for being used for distributed satellite systems in overlength optical cable provided using technical scheme, is pressed
The connection of each equipment and part is carried out according to technical scheme, using Raman coherent light frequency domain detection system（R-
COFDR）, R-COFDR and single-mode fiber are attached and R-COFDR direct impulse light is injected into single-mode fiber, by
It is attached after device according to required.
After tested, confirming that all parts and equipment is all connected with normally, and can be with stable operation in the case of, you can energization
Tested.Tested in accordance with the following methods during experiment：
The first step, by the first Raman coherent light frequency domain detection system 1 and the second Raman coherent light frequency domain detection system 5 with it is upper
Row single-mode fiber 4 and descending single-mode fiber 3 are attached；
Second step, repeater 2 is arranged in each segmentation of up single-mode fiber 4 and descending single-mode fiber 3；
3rd step, the spy by the first Raman coherent light frequency domain detection system 1 and the second Raman coherent light frequency domain detection system 5
Survey pulsed light and be injected into up single-mode fiber 4 and descending single-mode fiber 3；
Back scattering Raman optical signal in 4th step, the up single-mode fiber 4 of collection and descending single-mode fiber 3 is big to obtain
The temperature information of every bit along the optical fiber under optical cable normal operation is measured, and establishes initial data archives；
5th step, according to step（Four）The initial data archives of gained, data processing is carried out, so as to obtain the temperature of the optical cable
Spend the Mean curve of Monitoring Data.
Further data processing is that long-time Monitoring Data is averaged, and average value can disappear only a few distortion data
Remove, so that measurement data is truer.
Compared with prior art, without using isolator, it is possible to be enough in the optical cable that there are long repeater span
R-COFDR is monitored, high resolution, and snr loss is small.
In summary, using in a kind of overlength optical cable be used for distributed satellite systems system can solve traditional length away from
It is low from the temperature survey resolution ratio of optical fiber group, snr loss is big, and can cause backscatter signals can not be by using isolator
Along backtracking, so that the problem of being difficult to detect scattered light signal.
Claims (3)
1. a kind of system for being used for distributed satellite systems in overlength optical cable, including the first Raman coherent light frequency domain detection system
（1）, the second Raman coherent light frequency domain detection system（5）, up single-mode fiber（4）, descending single-mode fiber（3）And repeater（2）,
It is characterized in that：Described up single-mode fiber（4）With descending single-mode fiber（3）Both ends respectively with the first Raman coherent light frequency domain
Detecting system（1）With the second Raman coherent light frequency domain detection system（5）Connection；First Raman coherent light frequency domain detection system（1）
With the second Raman coherent light frequency domain detection system（5）Direct impulse light in up single-mode fiber（4）With descending single-mode fiber（3）
Inside；Described up single-mode fiber（4）With descending single-mode fiber（3）Repeater is mounted in each segmentation（2）.
A kind of 2. system for being used for distributed satellite systems in overlength optical cable according to claim 1, it is characterised in that：
Described repeater（2）Including the first image intensifer（21）, the second image intensifer（22）, the first loopback passage（24）With the second ring
Return passage（23）, described the first image intensifer（21）With the second image intensifer（22）Pass through the first loopback passage（24）With second
Loopback passage（23）Connect and form cyclic structure.
A kind of 3. system for being used for distributed satellite systems in overlength optical cable according to claim 1, it is characterised in that：
Described up single-mode fiber（4）With descending single-mode fiber（3）Respectively to include the optical fiber of more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152015.9U CN206670822U (en) | 2017-02-21 | 2017-02-21 | It is used for the system of distributed satellite systems in a kind of overlength optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720152015.9U CN206670822U (en) | 2017-02-21 | 2017-02-21 | It is used for the system of distributed satellite systems in a kind of overlength optical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206670822U true CN206670822U (en) | 2017-11-24 |
Family
ID=60379437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720152015.9U Active CN206670822U (en) | 2017-02-21 | 2017-02-21 | It is used for the system of distributed satellite systems in a kind of overlength optical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206670822U (en) |
-
2017
- 2017-02-21 CN CN201720152015.9U patent/CN206670822U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107917738B (en) | Distributed optical fiber sensing system capable of simultaneously measuring temperature, strain and vibration | |
| CN103297126B (en) | The PON line fault monitoring method of optically-based labelling method and device thereof | |
| CN105721048B (en) | Compound optical fiber communication line fault monitoring method and system | |
| CN103808339B (en) | OTDR (optical time domain reflectometry) device and method based on multi-wavelength pulse optical signals | |
| US7310134B2 (en) | Device and method of optical fiber condition monitoring in optical networks | |
| US7088436B2 (en) | Integrated optical time domain reflectometer and optical supervisory network | |
| CN107483106A (en) | A kind of online optical time domain reflectometer structure, detecting system and detection method | |
| CN1933376B (en) | Optical transceiver module for monitoring an optical fiber and method for making available measuring data from monitoring an optical fiber | |
| CN106595776B (en) | A kind of more physical quantity sensor-based systems of distribution type fiber-optic and method | |
| CN106525096B (en) | A kind of brillouin distributed optical fiber sensing device and reduce gain spectral line width method | |
| EP1558905B1 (en) | Method of evaluating fiber pmd using polarization optical time domain reflectometry | |
| CN110440851B (en) | Long-distance multi-parameter measuring device and method based on Brillouin and Raman scattering | |
| CN105953941A (en) | Distributed fiber temperature measurement method and device based on Raman scattering | |
| US7099581B2 (en) | OTDR arrangement for detecting faults in an optical transmission system on a span by span basis | |
| EP3571789B1 (en) | Techniques for high-resolution line monitoring with a standarized output and an optical communication system using the same | |
| CN206670822U (en) | It is used for the system of distributed satellite systems in a kind of overlength optical cable | |
| CN102928740B (en) | Intelligent collection type fault diagnosis and In-Line Temperature Measure System | |
| CN110375960B (en) | Device and method based on super-continuum spectrum light source OTDR | |
| CN102523038B (en) | Optical time-domain reflectometer, reflection event detection method and optical network system | |
| CN106644160A (en) | System and method for distributed temperature measurement in ultra-long optical cable | |
| CN114526809A (en) | Ultra-long distance distributed optical fiber vibration sensing detection method and device | |
| CN110763956B (en) | Space division multiplexing-based optical fiber polarization sensing lightning positioning system and method | |
| CN210268885U (en) | Phase modulation type optical time domain reflectometer | |
| CN207263419U (en) | A kind of Cable's Fault detecting system based on Rayleigh scattering technology | |
| CN113252089A (en) | Distributed optical fiber sensing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |