CN203705144U - Optical fiber survey instrument - Google Patents
Optical fiber survey instrument Download PDFInfo
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- CN203705144U CN203705144U CN201320845026.7U CN201320845026U CN203705144U CN 203705144 U CN203705144 U CN 203705144U CN 201320845026 U CN201320845026 U CN 201320845026U CN 203705144 U CN203705144 U CN 203705144U
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- optical fiber
- instrument
- laser
- circulator
- coupling mechanism
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Abstract
The utility model relates to an optical fiber survey instrument. The survey instrument comprises a laser device, a pulse generation circuit, a circulator, a first coupling device, a second coupling device and a signal processor, wherein the pulse generation circuit is electrically connected with the laser device and used for driving the laser device; the circulator is optically coupled with the laser device; the first coupling device is used for receiving probing lights sent by the circulator; the first coupling device is in optical fiber connection with the second coupling device respectively via a long arm optical fiber and a short arm optical fiber, and the second coupling device is also optically coupled with a to-be-detected optical fiber to enable the probing light to be inputted to the to-be-detected optical fiber; and the signal processor is used for processing probing lights fed back by the to-be-detected optical fiber and sent sequentially via the second coupling device, the first coupling device and the circulator; and the signal processor is electrically connected with the pulse generation circuit. According to the optical fiber survey instrument, the long arm optical fiber and the short arm optical fiber generate Sagnac effects to detect the optical fiber, the optical fiber can be quickly determined without being damaged, the querying and recognizing difficulty of the optical fiber can be reduced, and convenience of optical fiber maintenance and detection is improved.
Description
Technical field
The utility model relates to optical fiber measurement equipments, relates in particular to a kind of optical fiber generaI investigation instrument.
Background technology
Due to the develop rapidly of fiber optic network now, optical fiber link becomes increasingly complex, particularly in central machine room or data center, optical fiber is complicated in mistake especially, carry out searching and identifying of one section of optical fiber, only depend on just the taking time and effort very much of change of method of artificial cognition, belong on earth which circuit, fiber distribution between which website for one section of optical fiber, these information are for the optical fiber having laid and be not easy rapid acquisition, this is just to the searching and identify and bring many difficulties of optical fiber, and the convenience that cause optical fiber maintenance, detects is not high.
Utility model content
The purpose of this utility model is the defect for overcoming prior art, and a kind of optical fiber generaI investigation instrument is provided, and searches and identify difficulty, the convenience that improve optical fiber maintenance, detects with what reduce optical fiber.
For achieving the above object, the utility model is by the following technical solutions:
A kind of optical fiber generaI investigation instrument, comprising:
For generation of the laser instrument of surveying light;
Be electrically connected with laser instrument, for the pulse generating circuit of drive laser;
Circulator with laser optical coupling;
For receiving the first coupling mechanism of the detection light that circulator transmits;
For receiving the second coupling mechanism of the detection light that the first coupling mechanism transmits, the first coupling mechanism is connected with the second coupling mechanism optical fiber with galianconism optical fiber by long-armed optical fiber respectively, the length of the Length Ratio galianconism optical fiber of long-armed optical fiber is large, the second coupling mechanism also with testing fiber optically-coupled will survey light incident testing fiber;
For the treatment of the signal processor of the detection light transmitting through the second coupling mechanism, the first coupling mechanism and circulator successively from testing fiber feedback, signal processor is also electrically connected with pulse generating circuit.
Further, signal processor comprises:
Be connected with circulator optical fiber, for light signal being converted to the photoelectric commutator of electric signal;
Be electrically connected with photoelectric commutator, for computing with compare through the signal processing of the electric signal after photoelectric commutator conversion and go back primary circuit;
With signal processing go back primary circuit be electrically connected, for to the wavelet analysis device that carries out wavelet transformation through the electric signal after photoelectric commutator conversion;
Go back primary circuit with signal processing respectively and pulse generating circuit is electrically connected, for the field programmable gate sequence of gating pulse circuit for generating.
Further, signal processor also comprises:
With signal processing go back primary circuit be electrically connected, for the voice output device of restoring acoustical signal;
With signal processing go back primary circuit be electrically connected, for going back the video follower of original video signal.
Further, photoelectric commutator is avalanche photodide.
Further, this optical fiber generaI investigation instrument also comprises and is arranged between laser instrument and circulator and the laser amplifier being connected with laser instrument and circulator respectively.
Further, this optical fiber generaI investigation instrument also comprises and being electrically connected with laser instrument, laser amplifier respectively and for the APC control circuit of stable laser power.
Further, laser instrument is distributed feedback laser, and laser amplifier is er-doped laser amplifier.
Further, this optical fiber generaI investigation instrument also comprises for detection of the thermometer of laser temperature, with temperature gauge linked ATC control circuit and for the semiconductor cooler of stabilized lasers actuator temperature.
Further, the splitting ratio of the first coupling mechanism and the second coupling mechanism is that scope is all 10:90 to 90:10.
In optical fiber generaI investigation instrument of the present utility model, signal processing is gone back primary circuit and is comprised OMAP4460 chip.
In optical fiber generaI investigation instrument of the present utility model, small echo route marker is the digital signal processor of TMS320C3X, TMS320VC5502 or TMS320F2810.
The utility model beneficial effect is compared with prior art:
(1) optical fiber generaI investigation instrument of the present utility model, producing Sagnac effect by long-armed optical fiber and galianconism optical fiber detects optical fiber, just can determine fast optical fiber without optical fiber is destroyed, reduced to optical fiber search and identify difficulty, improved the convenience of optical fiber maintenance, detection.
(2) the utility model is monitored laser instrument and laser amplifier by APC treatment circuit, output that can stabilized lasers signal; Also improve detection efficiency by wavelet conversion part simultaneously.
Brief description of the drawings
Fig. 1 is the circuit structure block diagram of the utility model the first embodiment
Fig. 2 is the circuit structure block diagram of the utility model the second embodiment
Embodiment
In order to more fully understand technology contents of the present utility model, below in conjunction with specific embodiment, the technical solution of the utility model is described further and is illustrated.
The circuit connection structure of the utility model the first embodiment as shown in Figure 1.
In the first embodiment, optical fiber generaI investigation instrument comprises a laser instrument 10, and for generation of the laser of surveying use, this laser instrument 10 is driven by pulse generating circuit 11, and pulse generating circuit 11 can select Keithley 4205-PG2 pulse producer to realize.Pulse generating circuit 11 is to laser instrument 10 transmitted electric signal, and laser instrument 10 sends the exploring laser light of pulse standard according to this pulse signal.The light-emitting window of laser machine 10 is by coupling fiber to circulator 20, and circulator 20 is for controlling the direction of transfer of light signal, and circulator 20 is also connected with the first coupling mechanism 31, and the first coupling mechanism 31 is separation/combination device.
Circulator 20 has following light path selectivity characteristic: the light of injecting circulator 20 from laser instrument 10 will incide the first coupling mechanism 31, and will incide signal processor 60 from the light that the first coupling mechanism 31 incides circulator 20.
The light that is sent to the first coupling mechanism 31 from circulator 20 is divided into two-way (other embodiment the splitting ratio of the first coupling mechanism 31 can from selecting between 10:90 to 90:10) according to splitting ratio 50:50, transmit again i.e. galianconism optical fiber 42(shortarm by two different optical fiber of length) and long-armed optical fiber 41(longarm).Galianconism optical fiber 42 and long-armed optical fiber 41 are for generation of Sagnac effect: the light that closes at the second coupling mechanism 32 that is 50:50 through splitting ratio forms two not light signals in the same time (in other embodiment the splitting ratio of the second coupling mechanism 32 can from selecting between 10:90 to 90:10), these two light signals pass through testing fiber 50 again, be subject to the impact of knocking input on testing fiber 50, the intensity of these two light signals changes, due to the characteristic of optical fiber, these light signals that carried knocking can be back to the second coupling mechanism 32 along optical fiber, then pass through again galianconism optical fiber 42(shortarm) and long-armed optical fiber 41(longarm) carry out time delay, like this, light signal through twice time delay can be through the distribution of circulator 20, be transferred on signal processor 60 and process.Signal processor 60 determines the optical fiber knocking by following mode: first two light signals that receive are converted to electric signal, and produce the signal zooming in or out according to the difference of phase place, and further by with compare and relevant treatment for the control signal of gating pulse circuit for generating 11, owing to being subject to knocking, the feedback light of impact is not identical with the signal that is not subject to the feedback light of knocking impact, just can realize the object of judgement optical fiber from analyzing the feedback light receiving.
The circuit structure of the utility model the second embodiment as shown in Figure 2.
Laser instrument 100 is before access circulator 200 in a second embodiment, first pass through the amplification processing of laser amplifier 106, enter into again circulator 200, then just enter respectively galianconism optical fiber 402 and long-armed optical fiber 401 through the light splitting of the first coupling mechanism 301, after this close light at the second coupling mechanism 302 places again, become and there are two not light signals in the same time.Due to the impact of knocking being subject on testing fiber 500, the intensity of these two light signals changes.Due to the characteristic of optical fiber, these light signals that carried knocking can be back to the second coupling mechanism 302 along testing fiber 500, then carry out time delay through galianconism optical fiber 402 and long-armed optical fiber 401 again, enter on signal processor 600 from circulator 200 through the light signal of twice time delay.
In a second embodiment, signal processor 600 comprises following assembly:
Primary circuit 603 is gone back in signal processing as core, selects the OMAP4460 chip of TI company as the acp chip of processing signals;
Photoelectric commutator 602, for converting the light signal importing into from circulator 200 to electric signal, preferred, can select avalanche photodide (APD, AvalanchePhotonDiode), to realize accurate opto-electronic conversion;
Field programmable gate sequence 601(FPGA, Field-ProgrammerGateArray), pulse signal for paired pulses circuit for generating 101 carries out clock control and calculating, also sends to signal processing to go back primary circuit 603 control information of gating pulse circuit for generating 101 simultaneously;
Wavelet analysis device 604, for carrying out to the received signal small echo operational analysis, in a second embodiment, can adopt the DSP(digitalsignalprocessor of number of different types, digital signal processor) realize, such as the TMS320C3X of TI company, TMS320VC5502, TMS320F2810 etc., all can be used as assembly to be connected on circuit;
Voice output device 605, such as earphone, loudspeaker etc., be reduced into sound effect for the knocking that electric signal is carried, and operating personnel can be heard intuitively and knock sound;
Video follower 606, such as computer monitor, oscillograph etc., be shown to operating personnel for the knocking that electric signal is carried by waveform, to obtain intuitively result of detection.
Photoelectric commutator 602, scene can be edited a sequence 601, wavelet analysis device 604, voice output device 605 and video follower 606 and be gone back primary circuit 603 with signal processing respectively and be electrically connected, photoelectric commutator 602 is also by optical fiber and circulator 200 optically-coupled, and scene can be edited a sequence 601 and is also electrically connected with pulse generating circuit 101.
The processing signals process of the signal processor 600 of employing said structure is as follows: the signal that field programmable gate sequence 601 sends for triggering laser instrument 100 to pulse generating circuit 101 on the one hand, carry out clock alignment and computing, this signal sends to signal processing and goes back products for further processing in primary circuit 603; On the other hand, photoelectric commutator 602 converts the light signal receiving to electric signal and sends to signal processing and go back primary circuit 603 and carry out computing comparison; In computing comparison, small echo arithmetical unit 604 participates in this computing comparison, to produce rapidly result more accurately; Pass through wavelet conversion, signal processing is gone back primary circuit 603 and is determined to knock be to occur on which root optical fiber, out also by the signal extraction of knocking simultaneously, and the signal knocking is sent to respectively on voice output device 605 and video follower 606 and changed, make operating personnel tell intuitively the optical fiber knocking.
In a second embodiment, in order to make the output of laser instrument 100 more stable, can select distributed feedback laser (DFB, DistributedFeedbackLaser), laser amplifier 106 correspondence is selected er-doped laser amplifier (EDFA, ErbiumDopedFiberAmplifier), and use an APC control circuit 103(AutomaticPowerControl, automated power control) laser instrument 100 and laser amplifier 106 are carried out to monitoring and the control of power, in a second embodiment, can adopt the INA114 of B-B company of the U.S., OPA177, the operational amplifier of the signals such as OPA547 is as APC control circuit 103, APC control circuit 103 is accepted respectively the state of its work at present from laser instrument 100 and laser amplifier 106, for example output power, enlargement factor etc., APC control circuit 103 is carried out FEEDBACK CONTROL according to these information to laser instrument 100, with the output power of stable laser 100, make the light signal of output can keep stable, reduce to float.
In a second embodiment, also further introduce a set of system that realizes laser instrument 100 stable outputs by controlling temperature, monitor the temperature of laser instrument 100 by thermometer 104, obtain temperature correlation information, and change into associated electric signal, send to ATC control circuit 102(Automatic TemperatureControl, automatic temperature-adjusting control) in detect, in the time detecting the temperature of laser instrument 100 and exceed the working range of restriction, ATC control circuit 102 is to semiconductor cooler 105(TEC, ThermoElectricCooler) send feedback control signal, to realize the temperature control to laser instrument 100.
Carry out the monitoring of stability by the power to laser instrument 100 and temperature simultaneously, make the detection light of laser instrument 100 outgoing more stable, and then it is more accurate to make to detect the result of testing fiber 500.
Optical fiber generaI investigation instrument provided by the utility model, except can directly detecting optical fiber, also can knock inspection to optical cable.In optical cable, be provided with multifiber, can realize equally the fiber-optic probe signal generation intensity effect in optical cable by knocking optical cable.
It should be noted that, the mode of the impact on the light signal generating intensity transmitting in optical fiber is to knock optical fiber in the above-described embodiment, but the utility model is not limited to which, any can be to the mode of operation of the light signal generating intensity effect in optical fiber, as the means such as electricity, magnetic, power, heat, light can be applied in the utility model, knock as an alternative the detection mode of optical fiber.
More than statement only further illustrates technology contents of the present utility model with embodiment; so that reader is easier to understand; but do not represent that embodiment of the present utility model only limits to this, any technology of doing according to the utility model is extended or recreation, is all subject to protection of the present utility model.
Claims (9)
1. an optical fiber generaI investigation instrument, is characterized in that, comprising:
For generation of the laser instrument of surveying light;
Be electrically connected with described laser instrument, for driving the pulse generating circuit of described laser instrument;
Circulator with described laser optical coupling;
For receiving the first coupling mechanism of the detection light that described circulator transmits;
For receiving the second coupling mechanism of the detection light that described the first coupling mechanism transmits, described the first coupling mechanism is connected with the second coupling mechanism optical fiber with galianconism optical fiber by long-armed optical fiber respectively, the length of the Length Ratio galianconism optical fiber of described long-armed optical fiber is large, described the second coupling mechanism also with testing fiber optically-coupled will survey light incident testing fiber;
For the treatment of the signal processor of the detection light transmitting through described the second coupling mechanism, the first coupling mechanism and circulator successively from testing fiber feedback, described signal processor is also electrically connected with described pulse generating circuit.
2. optical fiber generaI investigation instrument as claimed in claim 1, is characterized in that, described signal processor comprises:
Be connected with described circulator optical fiber, for light signal being converted to the photoelectric commutator of electric signal;
Be electrically connected with described photoelectric commutator, go back primary circuit for computing and the signal processing of comparing the electric signal after the conversion of described photoelectric commutator;
With described signal processing go back primary circuit be electrically connected, for the electric signal after the conversion of described photoelectric commutator being carried out to the wavelet analysis device of wavelet transformation;
Go back primary circuit with described signal processing respectively and pulse generating circuit is electrically connected, for the field programmable gate sequence of gating pulse circuit for generating.
3. optical fiber generaI investigation instrument as claimed in claim 2, is characterized in that, described signal processor also comprises:
With described signal processing go back primary circuit be electrically connected, for the voice output device of restoring acoustical signal;
With described signal processing go back primary circuit be electrically connected, for going back the video follower of original video signal.
4. optical fiber generaI investigation instrument as claimed in claim 2, is characterized in that, described photoelectric commutator is avalanche photodide.
5. the generaI investigation of the optical fiber as described in claim 1 to 4 any one instrument, is characterized in that, also comprises and is arranged between described laser instrument and circulator and the laser amplifier being connected with described laser instrument and circulator respectively.
6. optical fiber as claimed in claim 5 generaI investigation instrument, is characterized in that, also comprises being electrically connected with described laser instrument, laser amplifier respectively and for stablizing the APC control circuit of described laser power.
7. optical fiber generaI investigation instrument as claimed in claim 5, is characterized in that, described laser instrument is distributed feedback laser, and described laser amplifier is er-doped laser amplifier.
8. the generaI investigation of the optical fiber as described in claim 1 to 4 any one instrument, is characterized in that, also comprises for detection of the thermometer of described laser temperature, with described temperature gauge linked ATC control circuit and for stablizing the semiconductor cooler of described laser temperature.
9. the generaI investigation of the optical fiber as described in claim 1 to 4 any one instrument, is characterized in that, the splitting ratio scope of described the first coupling mechanism and the second coupling mechanism is all 10:90 to 90:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320845026.7U CN203705144U (en) | 2013-12-19 | 2013-12-19 | Optical fiber survey instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320845026.7U CN203705144U (en) | 2013-12-19 | 2013-12-19 | Optical fiber survey instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705144U true CN203705144U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320845026.7U Expired - Fee Related CN203705144U (en) | 2013-12-19 | 2013-12-19 | Optical fiber survey instrument |
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| Country | Link |
|---|---|
| CN (1) | CN203705144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269587A (en) * | 2017-12-29 | 2018-07-10 | 诺仪器（中国）有限公司 | Optical cable knocking display methods and system |
-
2013
- 2013-12-19 CN CN201320845026.7U patent/CN203705144U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269587A (en) * | 2017-12-29 | 2018-07-10 | 诺仪器（中国）有限公司 | Optical cable knocking display methods and system |
| CN108269587B (en) * | 2017-12-29 | 2021-10-29 | 一诺仪器（中国）有限公司 | Optical cable knocking signal display method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20191219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |