CN108562887A - A kind of multi-wavelength laser radar based on wavelength-division multiplex - Google Patents
A kind of multi-wavelength laser radar based on wavelength-division multiplex Download PDFInfo
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- CN108562887A CN108562887A CN201810395292.1A CN201810395292A CN108562887A CN 108562887 A CN108562887 A CN 108562887A CN 201810395292 A CN201810395292 A CN 201810395292A CN 108562887 A CN108562887 A CN 108562887A
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- wavelength
- laser
- circulator
- laser radar
- splitter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of multi-wavelength laser radars based on wavelength-division multiplex, belong to laser radar system field.The invention mainly comprises multiple-wavelength laser, optical beam-splitter, circulator, optical splitter, dense wave division multiplexer, signal sensor and data collecting cards.The present invention reaches object to be measured using multiple-wavelength laser transmitting multi-wavelength signals, by calculating the time difference between the multi-wavelength signals laser and local multiwavelength laser that object to be measured is reflected back, can draw out the 3-D view containing information on target object.Relative to traditional laser radar structure, measurement accuracy higher, stability is more preferable, and structure is compacter.
Description
Technical field
The invention discloses a kind of multi-wavelength laser radars based on wavelength-division multiplex, belong to laser radar system field.
Background technology
Laser radar is that a kind of scattering light characteristic by detecting distant object obtains the optical remote sensing of target information
Technology.With ultra-short pulse laser technology, the development and application of highly sensitive signal detection and high-speed data acquistion system, swash
Optical radar is with its high measurement accuracy, fine temporal resolution and spatial resolution greatly to detect span and as one kind
Important active remote sensing tool.
Laser radar all has wide since monochromaticjty is good, direction is strong, thinks the features such as dry type is good, small at many aspects
General application.For example, in the application of meteorological field, can be used for measuring aerosol, cloud, mist, visibility, air wind field, greenhouse gas
The variation of body, polluted gas, temperature and humidity, accurately real time data be not only flight guarantee, and can for study air
It variation, weather forecast and establishes correct Atmospheric models data is provided, the long-range climate change in the whole world and global carbon are recognized
Know and predict important directive significance.Wind field, ocean wind field, the stratospheric wind field of SEQUENCING VERTICAL scale, no matter from civilian
Or military angle, suffers from extremely important meaning.
Invention content
It is an object of the invention to devise a kind of multi-wavelength laser radar based on wavelength-division multiplex, the laser of laser radar
Scattered signal is collected by receiver, by opto-electronic conversion, is finally there is signal monitoring and processing system analysis and processing, is obtained required
Detection target parameter procedural information, the infomation detection of more object to be measured is realized by the laser radar.
To achieve the above object, the technical solution adopted by the present invention is a kind of multiwavelength laser thunder based on wavelength-division multiplex
It reaches, the multi-wavelength laser radar is by multiple-wavelength laser (1), optical beam-splitter (2), circulator (3), optical splitter (4), wave
Division multiplexer (5), photodetector (6), data collecting card (7) and computer (8) composition.
The laser that multiple-wavelength laser (1) projects is divided into two bundles by optical beam-splitter (2), a branch of as local oscillator, another
Beam enters 1 mouthful of circulator (3), and from 2 mouthfuls of outgoing of circulator (3), 2 mouthfuls of circulator (3) are connected with optical splitter (4), more waves
Long laser is acted on using the light splitting of optical splitter (4), and five wavelength emit laser to object to be measured simultaneously respectively, according to object to be measured
Reflection and back scattered signal again pass by optical splitter and utilize light path principle, by the sharp combiner of five wavelength, echo letter
Number entering dense wave division multiplexers (5) by circulator 3 mouthfuls of (3) is split, the light of five wavelength respectively with local oscillator light into
Row beat frequency, after the conversion of photosignal is realized by photodetector (6), electric signal enters in data collecting card (7), and data are adopted
Data in truck (7) are handled by computer (8), by calculate the multi-wavelength signals laser that is reflected back of object to be measured with
Time difference between local multiwavelength laser draws out the 3-D view containing information on target object.
Selected multiple-wavelength laser (1) is solid state laser, semiconductor laser, optical fiber laser, gas laser
Device or Ramar laser.The wave-length coverage of multiple-wavelength laser (1) can be from ultraviolet to infrared.
The output wavelength of multiple-wavelength laser (1) is five kinds, is 1550nm, 1550.4nm, 1550.8nm respectively,
1550.12nm 1550.16nm.
Ranging from 700nm≤λ≤2000nm of the central wavelength lambda of the circulator (3).
Compared with prior art, the present invention has the advantages that.
1, multi-wavelength emission may be implemented using multiple-wavelength laser as the laser radar of light source in the present invention, to multi-wavelength
Echo-signal be acquired, the information of more object to be measured can be obtained, therefore experimental data is more comprehensively reliable.
2, present invention profit transmitting signal is gone the same way with signal is received, and simplifies the volume of laser radar, and formula structure is compacter,
Expense substantially reduces.
3, present invention design is simple, compact-sized, it is easy to accomplish industrialization.
Description of the drawings
Fig. 1 is the General Principle block diagram of laser radar.
Fig. 2 is the schematic diagram of multi-wavelength laser radar.
In figure：1, multiple-wavelength laser, 2, optical beam-splitter, 3, circulator, 4, optical splitter, 5, wavelength division multiplexer, 6, light
Electric explorer, 7, data collecting card, 8, computer.
Specific implementation mode
The present invention is described in further details below in conjunction with drawings and examples.
Fig. 1 is the General Principle block diagram of laser radar.Laser radar in figure is by emission system, reception system and signal
Processing system forms.Wherein, laser transmitting system includes laser, laser beam splitter etc..Laser beam splitter is by multi-wavelength
Laser is split, and then emitting can be by the decaying and scattering of atmospheric medium in transmission process to detection target.Laser
Radar Receiver System is divided into the parts such as receiver, electrooptical device.Laser light scattering signal back to laser radar is received
Device is collected, and by opto-electronic conversion, is finally had signal monitoring and processing system analysis and processing, is obtained the ginseng of required detection target
Several procedural informations.
A kind of multi-wavelength laser radar based on wavelength-division multiplex, Fig. 2 are that multi-wavelength of the present invention for when detecting target swashs
Optical radar schematic diagram, wherein the multi-wavelength laser radar is by multiple-wavelength laser (1), optical beam-splitter (2), circulator
(3), optical splitter (4), wavelength division multiplexer (5), photodetector (6), data collecting card (7) and computer (8) composition.
The laser that multiple-wavelength laser (1) projects is divided into two bundles by optical beam-splitter (2), a branch of as local oscillator, another
Beam enters 1 mouthful of circulator (3), and from 2 mouthfuls of outgoing of circulator (3), 2 mouthfuls of circulator (3) are connected with optical splitter (4), more waves
Long laser is acted on using the light splitting of optical splitter (4), and five wavelength emit laser to object to be measured simultaneously respectively, according to object to be measured
Reflection and back scattered signal again pass by optical splitter and utilize light path principle, by the sharp combiner of five wavelength, echo letter
Number entering dense wave division multiplexers (5) by circulator 3 mouthfuls of (3) is split, the light of five wavelength respectively with local oscillator light into
Row beat frequency, after the conversion of photosignal is realized by photodetector (6), electric signal enters in data collecting card (7), and data are adopted
Data in truck (7) are handled by computer (8), by calculate the multi-wavelength signals laser that is reflected back of object to be measured with
Time difference between local multiwavelength laser draws out the 3-D view containing information on target object.
Selected multiple-wavelength laser (1) is solid state laser, semiconductor laser, optical fiber laser, gas laser
Device or Ramar laser.The wave-length coverage of multiple-wavelength laser (1) can be from ultraviolet to infrared.
The output wavelength of multiple-wavelength laser (1) is five kinds, is 1550nm, 1550.4nm, 1550.8nm respectively,
1550.12nm 1550.16nm.
Ranging from 700nm≤λ≤2000nm of the central wavelength lambda of the circulator (3).
Claims (4)
1. a kind of multi-wavelength laser radar based on wavelength-division multiplex, it is characterised in that：The multi-wavelength laser radar is by more waves
Long laser (1), optical beam-splitter (2), circulator (3), optical splitter (4), wavelength division multiplexer (5), photodetector (6), number
It is formed according to capture card (7) and computer (8)；
The laser that multiple-wavelength laser (1) projects is divided into two bundles by optical beam-splitter (2), a branch of as local oscillator, another beam into
Enter 1 mouthful of circulator (3), from 2 mouthfuls of outgoing of circulator (3), 2 mouthfuls of circulator (3) are connected with optical splitter (4), and multi-wavelength swashs
Light is acted on using the light splitting of optical splitter (4), and five wavelength emit laser to object to be measured simultaneously respectively, are reflected according to object to be measured
Optical splitter is again passed by with back scattered signal and utilizes light path principle, by the sharp combiner of five wavelength, echo-signal warp
Cross circulator (3) 3 mouthfuls are split into dense wave division multiplexer (5), and the light of five wavelength is clapped with local oscillator light respectively
Frequently, realize that the conversion of photosignal, electric signal enter in data collecting card (7) after by photodetector (6), data collecting card
(7) data in are handled by computer (8), by calculating the multi-wavelength signals laser and local that object to be measured is reflected back
Time difference between multiwavelength laser draws out the 3-D view containing information on target object.
2. a kind of multi-wavelength laser radar based on wavelength-division multiplex according to claim 1, it is characterised in that：Selected
Multiple-wavelength laser (1) is solid state laser, semiconductor laser, optical fiber laser, gas laser or Ramar laser；It is more
The wave-length coverage of long wavelength laser (1) can be from ultraviolet to infrared.
3. a kind of multi-wavelength laser radar based on wavelength-division multiplex according to claim 1, it is characterised in that：Multi-wavelength swashs
The output wavelength of light device (1) is five kinds, is 1550nm, 1550.4nm, 1550.8nm, 1550.12nm, 1550.16nm respectively.
4. a kind of multi-wavelength laser radar based on wavelength-division multiplex according to claim 1, it is characterised in that：The annular
Ranging from 700nm≤λ≤2000nm of the central wavelength lambda of device (3).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395292.1A CN108562887A (en) | 2018-04-27 | 2018-04-27 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
| CN201910339960.3A CN110058210A (en) | 2018-04-27 | 2019-04-25 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810395292.1A CN108562887A (en) | 2018-04-27 | 2018-04-27 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
Publications (1)
| Publication Number | Publication Date |
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| CN108562887A true CN108562887A (en) | 2018-09-21 |
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| CN201810395292.1A Withdrawn CN108562887A (en) | 2018-04-27 | 2018-04-27 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
| CN201910339960.3A Pending CN110058210A (en) | 2018-04-27 | 2019-04-25 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910339960.3A Pending CN110058210A (en) | 2018-04-27 | 2019-04-25 | A kind of multi-wavelength laser radar based on wavelength-division multiplex |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444848A (en) * | 2018-10-25 | 2019-03-08 | 上海禾赛光电科技有限公司 | Scanning means and its scan method, laser radar |
| WO2022148136A1 (en) * | 2021-01-05 | 2022-07-14 | 华为技术有限公司 | Detection apparatus, lidar system and terminal |
| GB2620312A (en) * | 2021-04-06 | 2024-01-03 | Mitsubishi Electric Corp | Optical measurement device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671212B (en) * | 2021-08-16 | 2022-07-15 | 南京牧镭激光科技有限公司 | Optical path switching channel and switching method for measuring three-dimensional air volume based on DWDM optical switch module, and laser radar |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253394B (en) * | 2011-04-21 | 2012-10-24 | 北京理工大学 | Multispectral stripe tube three-dimensional lidar imaging apparatus |
| US9500634B2 (en) * | 2012-12-31 | 2016-11-22 | Omni Medsci, Inc. | Short-wave infrared super-continuum lasers for natural gas leak detection, exploration, and other active remote sensing applications |
| KR101312407B1 (en) * | 2013-01-30 | 2013-09-27 | 주식회사 지에이치허브 | Apparatus of generating laser light and method thereof |
| CN107003411A (en) * | 2014-12-12 | 2017-08-01 | 三菱电机株式会社 | Laser radar apparatus |
| CN206422377U (en) * | 2016-10-26 | 2017-08-18 | 华南理工大学 | A kind of multi-wavelength single frequency optical fiber laser of short straight cavity configuration |
| CN207217993U (en) * | 2017-08-15 | 2018-04-10 | 中国科学技术大学 | A kind of multi-wavelength frequency multiplication fiber laser device of wavelength-division multiplex |
-
2018
- 2018-04-27 CN CN201810395292.1A patent/CN108562887A/en not_active Withdrawn
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2019
- 2019-04-25 CN CN201910339960.3A patent/CN110058210A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444848A (en) * | 2018-10-25 | 2019-03-08 | 上海禾赛光电科技有限公司 | Scanning means and its scan method, laser radar |
| CN109444848B (en) * | 2018-10-25 | 2021-03-19 | 上海禾赛科技股份有限公司 | Scanning device and scanning method thereof, and laser radar |
| WO2022148136A1 (en) * | 2021-01-05 | 2022-07-14 | 华为技术有限公司 | Detection apparatus, lidar system and terminal |
| GB2620312A (en) * | 2021-04-06 | 2024-01-03 | Mitsubishi Electric Corp | Optical measurement device |
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| CN110058210A (en) | 2019-07-26 |
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Application publication date: 20180921 |
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