CN206237407U - A kind of breakpoints of optical fiber positioning and measuring system - Google Patents
A kind of breakpoints of optical fiber positioning and measuring system Download PDFInfo
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- CN206237407U CN206237407U CN201621393968.6U CN201621393968U CN206237407U CN 206237407 U CN206237407 U CN 206237407U CN 201621393968 U CN201621393968 U CN 201621393968U CN 206237407 U CN206237407 U CN 206237407U
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- laser
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Abstract
The utility model discloses a kind of breakpoints of optical fiber positioning and measuring system,Including signal generator,The signal generator side has been electrically connected with laser and time correlation photon counting card,The laser side is electrically connected with erbium-doped fiber amplifier,The erbium-doped fiber amplifier side is electrically connected with attenuator,The attenuator side is electrically connected with wave filter,The wave filter side is electrically connected with circulator,The circulator side is electrically connected with and is connected with single-photon detector and testing fiber,The single-photon detector side is electrically connected with the time correlation photon counting card,This measuring method can improve the detection range of optical fiber,And the incident optical power of testing fiber can be injected into outside regulation control,Realization is recorded with time correlation photon counting card to laser time of flight,Improve the dynamic range of optical time domain reflectometer,Improve precision and operating efficiency.
Description
Technical field
The utility model is related to a kind of positioning and measuring system, and specially a kind of breakpoints of optical fiber is positioned and measuring system, category
In optical communication field.
Background technology
Optical time domain reflectometer is for optical fiber cable production, construction, maintenance test and repairing in optical fiber telecommunications system
Essential tester.Burst pulse light is injected testing fiber by optical time domain reflectometer according to backscattering method, and pulsed light exists
Stronger Fresnel reflection light can be produced when running into connector, smooth mirror section, optical fiber terminal etc., detects return in same one end
Scattering light, the distance of target can be accurately calculated further according to laser time of flight method.It is incident with the increase of testing fiber length
Light and return optical transmission loss increase so that optical fiber end in the same direction detection less than the optical signal that fiber distal end is returned, therefore can
Detect the maximum detectable range that optical time domain reflectometer is directly determined through the small-signal light after long range transmission attenuation.In recent years
Come, with the reduction year by year of optical communication equipment production cost, the ethernet technology based on optical fiber is traditional to communication network "
Last one kilometer " is permeated, and optical fiber gradually replaces traditional twisted-pair feeder, and the passage of internet network is accessed as enterprise and family.
The Technique on Quantum Communication for rising recently will also use long-distance optical fiber and be communicated.How production, construction, using, safeguard in
Detection fiber path, is a most extensive, most basic know-how in fiber optic applications field.Based on optical time domain reflection principle
Test optical fiber with its non-destructive, only need that one end is accessed and quickly advantage directly perceived becomes optical fiber cable production, construction, dimension
Indispensable tester in shield test and repairing.How the detection range of optical fiber is improved, and then in less detection time
It is several it is lower fiber failure point is fast and accurately positioned, be that current optical time domain reflectometer needs one solved important to ask
Topic.
Utility model content
The technical problems to be solved in the utility model overcomes existing defect, proposes a kind of breakpoints of optical fiber positioning and measurement system
System, adjustable amplification is carried out to incident pulse laser by being provided with EDFA Erbium-Doped Fiber Amplifier, and can be in outside regulation control injection
To the incident optical power of testing fiber, can meet simultaneously it is near, in, remote fiber test demand, improve the detection of optical fiber away from
From, gain coefficient is controlled by being provided with erbium-doped fiber amplifier and attenuator, it is by being provided with wave filter that pulse signal is further
Treatment, is positioned, to case point by being provided with single-photon detector reception optical fiber back-scattering light by being provided with time correlation
Photon counting card is recorded to laser time of flight, improves precision and operating efficiency.
In order to solve the above-mentioned technical problem, the utility model provides following technical scheme：
A kind of breakpoints of optical fiber positioning of the utility model and measuring system, including signal generator, the signal generator one
Side has been electrically connected with laser and time correlation photon counting card, and the laser side is electrically connected with Er-doped fiber and puts
Big device, the erbium-doped fiber amplifier side is electrically connected with attenuator, and the attenuator side is electrically connected with wave filter, institute
State wave filter side and be electrically connected with circulator, the circulator side has been electrically connected with single-photon detector and has treated light-metering
Fibre, the single-photon detector side is electrically connected with the time correlation photon counting card.
Used as a kind of optimal technical scheme of the present utility model, the attenuator is displacement type optical attenuator.
Used as a kind of optimal technical scheme of the present utility model, the laser is wave band for the near-infrared of 1550nm swashs
Light device.
Used as a kind of optimal technical scheme of the present utility model, the erbium-doped fiber amplifier is by Er-doped fiber and pump light
Source constitutes.
Used as a kind of optimal technical scheme of the present utility model, the frequency of the single-photon detector is 1GHz.
The beneficial effect that the utility model is reached is：This system is swashed by being provided with EDFA Erbium-Doped Fiber Amplifier to incident pulse
Light carries out adjustable amplification, and the incident optical power of testing fiber can be injected into outside regulation control, can meet simultaneously it is near,
In, remote fiber test demand, improve the detection range of optical fiber, control to increase by being provided with erbium-doped fiber amplifier and attenuator
Beneficial coefficient, is further processed pulse signal by being provided with wave filter, is dorsad dissipated by being provided with single-photon detector reception optical fiber
Penetrate light to position case point, laser time of flight is recorded by being provided with time correlation photon counting card, improve
Precision and operating efficiency.
Brief description of the drawings
Accompanying drawing is used for providing being further understood to of the present utility model, and constitutes a part for specification, with this practicality
New embodiment is used to explain the utility model together, does not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is system construction drawing of the present utility model；
Fig. 2 is that the utility model surveys time correlation photon counting card data statistics figure；
In figure：1st, signal generator；2nd, laser；3rd, time correlation photon counting card；4th, erbium-doped fiber amplifier；5th, decline
Subtract device；6th, wave filter；7th, circulator；8th, single-photon detector；9th, testing fiber.
Specific embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Embodiment 1
As shown in Figure 1-2, the utility model provides a kind of breakpoints of optical fiber positioning and measuring system, including signal generator
（1）, the side of signal generator 1 has been electrically connected with laser 2 and time correlation photon counting card 3, and the side of laser 2 is electrical
Erbium-doped fiber amplifier 4 is connected with, the side of erbium-doped fiber amplifier 4 is electrically connected with attenuator 5, and the side of attenuator 5 electrically connects
Wave filter 6 is connected to, the side of wave filter 6 is electrically connected with circulator 7, and the side of circulator 7 has been electrically connected with single photon detection
Device 8 and testing fiber 9, the side of single-photon detector 8 is electrically connected with time correlation photon counting card 3.
Attenuator 5 is displacement type optical attenuator, and advantage is return loss high.
Laser 2 is that wave band is the near infrared laser of 1550nm, and so loss is very small in a fiber, while being
Lose can light and, to eye-safe, with very big military and civilian value.
Erbium-doped fiber amplifier 4 is made up of Er-doped fiber with pump light source, is realized based on outer using erbium-doped fiber amplifier 4
The laser amplifier and gain coefficient of portion's gain can regulate and control, can so meet simultaneously it is near, in, remote fiber test demand.
The frequency of single-photon detector 8 is 1GHz, can efficiently detect faint return optical signal.
Specifically, when using, the same trigger signal of two-way is produced by signal generator 1, laser 2 is connected to all the way and is used
In narrow-pulse laser is produced, another road is connected to time correlation photon counting card 3 for marking the initial time of laser flying, narrow arteries and veins
Impulse light is linked into by after EDFA Erbium-Doped Fiber Amplifier 4 and the control gain coefficient of attenuator 5, then after filtering after the treatment of device 6
The input of circulator 7, the public of circulator 7 terminates to testing fiber 9, the return light that light pulse is produced in testing fiber 9
Single-photon detector 8 is passed to by the output end of circulator 7, optical fiber back-scattering light is received come right by single-photon detector 8
Case point is positioned, and return optical signals single-photon detector 8 changing into related between access then after detectable electric signal
The end end of photon counting card 3, so as to measure the length of optical fiber, time correlation photon counting card 3 records the past of each return light
Return the two-way time, and the light pulse meeting in the flexible jumper in by optical fiber, breakpoint, tail optical fiber end face etc. case point being input into
Return light is more prone to, the detection range of optical fiber is improve, and entering for testing fiber can be injected into outside regulation control
Penetrate luminous power, can meet simultaneously it is near, in, remote fiber test demand, improve operating efficiency.
The utility model carries out adjustable amplification to incident pulse laser by being provided with EDFA Erbium-Doped Fiber Amplifier 4, and can be
Outside regulation control is injected into the incident optical power of testing fiber, can meet simultaneously it is near, in, remote fiber test demand, carry
The detection range of optical fiber high, controls gain coefficient, by being provided with filtering by being provided with erbium-doped fiber amplifier 4 with attenuator 5
Device 6 further processes pulse signal, and case point is determined by being provided with the reception optical fiber back-scattering light of single-photon detector 8
Position, is recorded by being provided with time correlation photon counting card 3 to laser time of flight, improves precision and operating efficiency.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to
Utility model, although being described in detail to the utility model with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Equivalent is carried out, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc.,
Should be included within protection domain of the present utility model.
Claims (5)
1. a kind of breakpoints of optical fiber is positioned and measuring system, including signal generator（1）, it is characterised in that the signal generator
（1）Side has been electrically connected with laser（2）With time correlation photon counting card（3）, the laser（2）Side electrically connects
It is connected to erbium-doped fiber amplifier（4）, the erbium-doped fiber amplifier（4）Side is electrically connected with attenuator（5）, the attenuator
（5）Side is electrically connected with wave filter（6）, the wave filter（6）Side is electrically connected with circulator（7）, the circulator（7）
Side has been electrically connected with single-photon detector（8）With testing fiber（9）, the single-photon detector（8）Side electrically connects
Connect the time correlation photon counting card（3）.
2. a kind of breakpoints of optical fiber according to claim 1 is positioned and measuring system, it is characterised in that the attenuator（5）
It is displacement type optical attenuator.
3. a kind of breakpoints of optical fiber according to claim 1 is positioned and measuring system, it is characterised in that the laser（2）
For wave band is the near infrared laser of 1550nm.
4. a kind of breakpoints of optical fiber according to claim 1 is positioned and measuring system, it is characterised in that the Er-doped fiber is put
Big device（4）It is made up of with pump light source Er-doped fiber.
5. a kind of breakpoints of optical fiber according to claim 1 is positioned and measuring system, it is characterised in that the single photon detection
Device（8）Frequency be 1GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621393968.6U CN206237407U (en) | 2016-12-19 | 2016-12-19 | A kind of breakpoints of optical fiber positioning and measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621393968.6U CN206237407U (en) | 2016-12-19 | 2016-12-19 | A kind of breakpoints of optical fiber positioning and measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN206237407U true CN206237407U (en) | 2017-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621393968.6U Active CN206237407U (en) | 2016-12-19 | 2016-12-19 | A kind of breakpoints of optical fiber positioning and measuring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206237407U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174241A (en) * | 2019-03-01 | 2019-08-27 | 南京科舜通信科技有限公司 | A kind of optical cable quality testing analysis method |
| CN111162834A (en) * | 2018-11-07 | 2020-05-15 | 中国移动通信集团湖南有限公司 | Optical time domain reflectometer testing method and optical time domain reflectometer |
-
2016
- 2016-12-19 CN CN201621393968.6U patent/CN206237407U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162834A (en) * | 2018-11-07 | 2020-05-15 | 中国移动通信集团湖南有限公司 | Optical time domain reflectometer testing method and optical time domain reflectometer |
| CN110174241A (en) * | 2019-03-01 | 2019-08-27 | 南京科舜通信科技有限公司 | A kind of optical cable quality testing analysis method |
| CN110174241B (en) * | 2019-03-01 | 2021-07-30 | 南京科舜通信科技有限公司 | Optical cable quality detection and analysis method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180828 Address after: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Co-patentee after: East China Normal University Patentee after: Shanghai Langyan Optoelectronics Technology Co.,Ltd. Address before: 201104 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: Shanghai Langyan Optoelectronics Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211012 Address after: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee after: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: Chongqing Research Institute of East China Normal University Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: EAST CHINA NORMAL University |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230526 Address after: No. 1, 2nd Floor, Building 1, No. 2, Huizhu Road, Yubei District, Chongqing 401120 Patentee after: Chongqing Huapu New Energy Co.,Ltd. Address before: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: Chongqing Research Institute of East China Normal University |
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| TR01 | Transfer of patent right |