CN204086538U - A kind of dual laser realizes the passive type laser ranging system of optical path compensation - Google Patents
A kind of dual laser realizes the passive type laser ranging system of optical path compensation Download PDFInfo
- Publication number
- CN204086538U CN204086538U CN201420578296.0U CN201420578296U CN204086538U CN 204086538 U CN204086538 U CN 204086538U CN 201420578296 U CN201420578296 U CN 201420578296U CN 204086538 U CN204086538 U CN 204086538U
- Authority
- CN
- China
- Prior art keywords
- optical
- wave length
- laser
- wdm
- signal
- 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
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The utility model discloses the passive type laser ranging system that a kind of dual laser realizes optical path compensation, wherein dual laser is connected with WDM, first wave length light signal is input to optical circulator by the first optical fiber by WDM, optical circulator by first wave length optical signal launch to reflective plane, optical circulator is entered into from the first wave length light reflected signal of reflective plane reflection, first wave length light reflected signal is input to optical branching device by the second optical fiber by optical circulator, the second wave length light signal that WDM exports enters optical branching device by the 3rd section of optical fiber, the output terminal of optical branching device is connected with APD.The utility model utilizes dual laser can reach the object of optical path compensation, and does not introduce other interference; Utilize wavelength division multiplexer WDM to make the light of different wavelength enter corresponding optical channel, the light path of structure is stablized; The optic technology adopted is ripe, and when compensating light path, cost increases little.
Description
Technical field
The utility model relates to field of photoelectric technology, is specifically related to the passive type laser ranging system that a kind of dual laser realizes optical path compensation, is applicable to realize light path calibration and compensation in the passive laser ranging system of optical fiber type.
Background technology
Traditional passive type laser ranging system, owing to employing very long optical fiber, in the process used, optical fiber can be subject to the impact of the extraneous factors such as temperature, the refractive index of optical fiber is caused to change thus light path change, and the extraneous factor changes such as optical fiber transmission path temperature are uneven, light path drift compensation is made to be difficult to realize, traditional compensation method utilizes two laser instruments to form two light paths one respectively as optical path one as reference light path, the change of light light path is in a fiber realized offsetting by doing difference, but the inconsistent phase drift causing laser instrument own temperature being brought to cause in the process compensated of the temperature due to two laser instruments self, passive type laser ranging system is measured inaccurately even cannot to measure.
Utility model content
The purpose of this utility model is the problems referred to above being to exist for prior art, the passive type laser ranging system that a kind of dual laser realizes optical path compensation is provided, the laser of two different wave lengths is produced by dual laser, the laser of a wavelength and wavelength division multiplexer (WDM) form outer light path and are used for measuring distance, in the laser of another wavelength and wavelength division multiplexer (WDM) are formed, light path is as reference light path, when not increasing cost, compensating and even can not measure because the factor impacts such as ambient temperature cause to measure accurately.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A kind of dual laser realizes the passive type laser ranging system of optical path compensation, comprise laser ranging module, described laser ranging module comprises dual laser and APD, the laser that dual laser exports is divided into first wave length light signal and second wave length light signal by WDM, first wave length light signal is input to optical circulator by the first optical fiber by WDM, optical circulator by first wave length optical signal launch to reflective plane, optical circulator is entered into from the first wave length light reflected signal of reflective plane reflection, first wave length light reflected signal is input to optical branching device by the second optical fiber by optical circulator, second wave length light signal is input to optical branching device by the 3rd optical fiber by WDM, the output terminal of optical branching device is connected with APD.
Length and the length equaling the 3rd optical fiber of the first optical fiber as above and the second optical fiber.
The utility model compared with prior art, has the following advantages:
1, utilize dual laser can reach the object of optical path compensation, and do not introduce other interference.
2, utilize wavelength division multiplexer WDM to make the light of different wavelength enter corresponding optical channel, the light path of structure is stablized.
3, the optic technology adopted is ripe, and when compensating light path, cost increases little.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the theory diagram of laser ranging module of the present utility model.
In figure: 1-laser ranging module; 2-WDM wavelength division multiplexer; 3-optical branching device; 4-optical circulator; 5-reflective plane; 101-frequency generating circuit; 102-drive circuit for laser; 103-dual laser; 104-is with reference to mixting circuit; 105-APD mixing receiving circuit; 106-APD(avalanche photodide); 107-feed circuit; 108-XOR circuit; 109-phase detector; 110-adjustable height die block.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: a kind of dual laser realizes the passive type laser ranging system of optical path compensation, high frequency carrier is modulated on the dual laser 103 of laser ranging module 1, successively send the light signal of two kinds of different wave lengths, be designated as first wave length light signal and second wave length light signal, first wave length light signal enters WDM 2 by coupling fiber, the light signal of different wave length can be made a distinction due to WDM 2 and not produce the light signal of this wavelength along the transmission of different optical channels at another optical channel, this first wave length light signal leads to coupled into optical fibres and enters optical circulator 4, the first wave length light signal that optical circulator 4 receives, be transferred to optical alignment mirror, optical alignment mirror by the light signal direct projection of first wave length on reflective plane, the first wave length light signal received reflects to optical alignment mirror by reflective plane again, due to optical circulator 4 be a kind of light inputted by port one time, light is almost break-even in the least to be exported by port 2, other ports do not have light output, when light is inputted by port 2, light is almost break-even in the least to be exported by port 3, other ports do not have light output.So reflect first wave length light reflected signal can directly by Optical Fiber Transmission to optical branching device 3, in this process, dual laser 103 sends laser to WDM 2 to optical circulator 4, optical circulator 4 is to optical collimator, optical collimator is to reflective plane, reflective plane is reflected light collimating apparatus again, optical collimator re-enters optical circulator 4 and is transferred to the light signal that optical branching device 3 makes APD can receive first wave length is outer light path, for measuring the distance of optical collimator to reflective plane.The distance L(of whole outer light path is outer)=L(optical fiber)+L(is to be measured).Then similar second wave length light signal directly enters another optical channel by WDM 2, then optical branching device 3 is connected directly to as interior light path by one and the optical fiber of the isometric distance of outer light path, for as with reference to light path (can be equivalent to the length of the first optical fiber and the second optical fiber and identical with the length of the 3rd optical fiber).In the distance L(of whole interior light path)=L(optical fiber).Described testing distance L(is to be measured)=L(is outer) in-L().Owing to make use of optical fiber isometric with it as reference light path, in the process that reality uses, containing multi-core fiber inside an optical cable, thus be easy to obtain reference path, because environment residing when laying is the same, when environmental change, L (optical fiber) can change because of the change of optical fibre refractivity, and last result gets difference can offset the impact that this change brings.Owing to employing dual laser 103, this dual laser 103 can the light signal separating two kinds of wavelength of timesharing, be encapsulated in so the temperature of two different wave length laser tube cores is the same in same Can, phase drift can not be caused because of two different wave length laser tube core temperature in the process compensated.And in the process used, employ WDM 2, can be good at the light signal of differentiation different wave length and there is very high isolation, can not crosstalk interference be produced.Use optical circulator 4 can save a reception optical collimator, and only use an optical collimator both utilizing emitted light signal also receiving optical signals, can reduce costs and blind area be dropped to very low.
As shown in Figure 2: the composition of laser ranging module 1 of the present utility model, circuit comprises feed circuit 107, power to each functional circuit, frequency generating circuit 101 produces a high-frequency signal S1 and produces another high-frequency signal S2 simultaneously, the frequency that S1 and S2 frequency phase-difference is very low, directly produces low frequency signal S3 by reference to mixting circuit by S1 and S2 mixing.The high-frequency signal S1 simultaneously produced drives dual laser 103 to send the light signal of first wave length by drive circuit for laser 102, the laser containing this high-frequency signal S1 is received by APD after first wave length light signal enters outer light path by WDM, adjustable height die block 110 changes the gain of amplifying after APD106 receives light signal, the light signal that APD receives acts on the APD mixing receiving circuit 105 high-frequency signal S2 that frequency generating circuit 101 produces simultaneously and also acts on APD mixing receiving circuit 105, obtains low frequency signal S4 through APD mixing receiving circuit 105.S3 and S4 exports to phase detector 109 simultaneously, obtains the signal S5 of the phase differential of outer light path.The light signal that same dual laser 103 sends second wave length obtains the signal S6 of the phase differential of interior light to interior light path.To the signal S5 of outer light path be represented and represent that namely the signal S6 of interior light path can obtain the signal representing inside and outside light path difference after XOR circuit, the pulsewidth size of its high level represents the distance of optical circulator distance reflective plane, is the testing distance of the passive laser ranging system of optical fiber type.
In the present embodiment, following device can be selected:
Dual laser 103: rom RLD2WMNL2,663/785nm 5mW dual laser.
WDM 2:650/790 wavelength division multiplexer FC/PC.
Optical circulator 4:650nm tri-ports light rings, FC/PC.
Optical collimator: aspheric surface optical fiber collimator, FC/PC.
Reflective plane 5:3M masonry reflecting film.
Optical branching device 3:650nm multimode 1 point of 2 FC/PC optical branching device.
APD106:AD500-8 or AD230-8.
Frequency generating circuit 101:TI company CKEL925.
With reference to mixting circuit 104:PHILIPS company BGA2022.
Adjustable height die block 110:BOOST booster circuit and voltage-multiplying circuit.
APD mixing receiving circuit 105:APD direct conversion circuit and across resistance amplifying circuit and the fertile hereby band-pass circuit of second order Bart.
Phase detector 109: phase discriminator.
XOR circuit 108: high speed XOR circuit.
Feed circuit 107:DC-DC power supply LDO power supply.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (2)
1. a dual laser realizes the passive type laser ranging system of optical path compensation, comprise laser ranging module (1), it is characterized in that, described laser ranging module (1) comprises dual laser (103) and APD(106), the laser that dual laser (103) exports is divided into first wave length light signal and second wave length light signal by WDM (2), first wave length light signal is input to optical circulator (4) by the first optical fiber by WDM (2), optical circulator (4) by first wave length optical signal launch to reflective plane (5), the first wave length light reflected signal reflected from reflective plane (5) enters into optical circulator (4), first wave length light reflected signal is input to optical branching device (3) by the second optical fiber by optical circulator (4), second wave length light signal is input to optical branching device (3) by the 3rd optical fiber by WDM (2), the output terminal of optical branching device (3) and APD(106) be connected.
2. a kind of dual laser according to claim 1 realizes the passive type laser ranging system of optical path compensation, it is characterized in that, the first described optical fiber and the length of the second optical fiber and equal the length of the 3rd optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420578296.0U CN204086538U (en) | 2014-09-30 | 2014-09-30 | A kind of dual laser realizes the passive type laser ranging system of optical path compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420578296.0U CN204086538U (en) | 2014-09-30 | 2014-09-30 | A kind of dual laser realizes the passive type laser ranging system of optical path compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204086538U true CN204086538U (en) | 2015-01-07 |
Family
ID=52179239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420578296.0U Active CN204086538U (en) | 2014-09-30 | 2014-09-30 | A kind of dual laser realizes the passive type laser ranging system of optical path compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204086538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445749A (en) * | 2015-11-13 | 2016-03-30 | 中国人民解放军空军装备研究院雷达与电子对抗研究所 | Multi-pulse laser range measuring system and multi-pulse laser range measuring method based on wavelength division |
| CN112711006A (en) * | 2021-01-07 | 2021-04-27 | 深圳市中图仪器股份有限公司 | Laser ranging system of optic fibre |
-
2014
- 2014-09-30 CN CN201420578296.0U patent/CN204086538U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445749A (en) * | 2015-11-13 | 2016-03-30 | 中国人民解放军空军装备研究院雷达与电子对抗研究所 | Multi-pulse laser range measuring system and multi-pulse laser range measuring method based on wavelength division |
| CN112711006A (en) * | 2021-01-07 | 2021-04-27 | 深圳市中图仪器股份有限公司 | Laser ranging system of optic fibre |
| CN112711006B (en) * | 2021-01-07 | 2023-08-22 | 深圳市中图仪器股份有限公司 | Optical fiber laser ranging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103743552B (en) | A kind of caliberating device of wide range continuous light path delay line | |
| CN113383246B (en) | FMCW laser radar system | |
| CN102281107A (en) | Dispersion measuring device and method for fiber optical device | |
| CN107727365B (en) | A kind of system using reflectance spectrum fineness measurement optical waveguide loss | |
| CN102636121A (en) | High-precision optical fiber length measuring system | |
| CN101290248B (en) | Single-mode infra-red wavemeter based on Mach-Zehnder Interferometer filtering principle | |
| CN102494801A (en) | Distributed optical delay optical fiber temperature sensor | |
| CN103712564A (en) | Reflection type optical fiber displacement sensor based on Y-shaped optical fiber coupler and self-focusing lens | |
| CN204086537U (en) | A kind of photoswitch realizes the passive laser ranging system of optical fiber type of inside and outside optical path compensation | |
| US20210381907A1 (en) | Planar optical waveguide device, and temperature measurement system | |
| CN102121851B (en) | Method for measuring length difference of array fibers | |
| CN107991259A (en) | A kind of cavity ring-down spectroscopy humidity measurement system based on intracavitary amplification | |
| CN207557107U (en) | A kind of cavity ring-down spectroscopy humidity measurement system based on intracavitary amplification | |
| CN107884876A (en) | A kind of polarization state detection chip based on Waveguide grating coupler | |
| CN202676133U (en) | High-precision optical fiber length measuring system | |
| CN204630604U (en) | A kind of SMS type parallel multiplex multiplex optical fibre sensor | |
| CN102243102B (en) | Photoelectric measuring device capable of measuring power and wavelength at same time | |
| CN204086538U (en) | A kind of dual laser realizes the passive type laser ranging system of optical path compensation | |
| CN101957238A (en) | Coherent phase detecting method based on Mach-Zehnder interferometer | |
| CN102494799B (en) | Dual-wavelength optical delay optical fiber temperature sensor | |
| CN203965129U (en) | Scanning confocal chamber F-P interferometer Free Spectral Range measuring system | |
| CN204555926U (en) | A kind of distributive fiber optic strain measuring system based on the long adjustable F-P white light interference demodulating equipment in chamber | |
| CN103234590A (en) | Underground optical fiber flow sensor in oil field | |
| CN117308909A (en) | Optical path design scheme of high-precision optical fiber gyroscope and manufacturing method thereof | |
| CN102135468A (en) | Optical insertion and return loss tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 430000 unit 1, floor 1-5, building 3-11, phase III, optical core center, 303 Guanggu Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN NEWFIBER PHOTOELECTRIC Co.,Ltd. Address before: 11 / F, building C3, optical valley software park, special No.1, Guanshan Avenue, Donghu Development Zone, Wuhan City, Hubei Province, 430074 Patentee before: WUHAN NEWFIBER OPTOELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address |