CN109239728A - LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system - Google Patents
LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system Download PDFInfo
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- CN109239728A CN109239728A CN201810458887.7A CN201810458887A CN109239728A CN 109239728 A CN109239728 A CN 109239728A CN 201810458887 A CN201810458887 A CN 201810458887A CN 109239728 A CN109239728 A CN 109239728A
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- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 239000000523 sample Substances 0.000 title claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 9
- 238000002310 reflectometry Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims abstract description 3
- 230000035800 maturation Effects 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 8
- 230000002776 aggregation Effects 0.000 claims description 6
- 238000004220 aggregation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 241000931526 Acer campestre Species 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
- G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
- G01V8/26—Detecting, e.g. by using light barriers using multiple transmitters or receivers using mechanical scanning systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3501—Constructional details or arrangements of non-linear optical devices, e.g. shape of non-linear crystals
Abstract
The present invention relates to a kind of LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement systems.To obtain 460-560nm band high-power and legerity type laser source, fundamental frequency light output is provided with technology maturation and the higher 915nm and 1120nm semiconductor laser of power, utilize the nonlinear crystals such as KDP, the output of 457.5nm (being known as 460nm with lower aprons) laser is obtained to two frequency multiplication of 915nm laser, the output of 560nm laser is obtained to two frequency multiplication of 1120nm laser.When implementing a wide range of laser search/ranging to submarine target for water surface motor platform, 915nm/460nm and 1120nm/560nm two can distinguish directive different directions to laser；When seabed medium is detected for underwater manoeuvre platform find suitable landing point when, judge using difference in reflectivity of the different medium to 460nm and 560nm laser, be a kind of to be suitble to airborne/underwater dual-purpose laser acquisition/ranging composite system.
Description
Technical field
LD fundamental frequency of the present invention/frequency multiplication multiwavelength laser complex probe/range-measurement system belongs to semiconductor laser technique application neck
Domain is a kind of suitable for airborne/underwater twin-channel laser detection/ranging composite system.
Background technique
Underwater unmanned vehicle and bathyscaph are that current the main of undersea detection, target reconnaissance and engineering construction that execute is put down
Platform, and aquatic unmanned aerial vehicle is then that substitution has the man-machine big regional reconnaissance in implementation sea, the prospecting of shallow sea submerged condition and rescue at sea prison
The main force of control is that carrier is small, limited from heavy and light, power supply capacity in view of the characteristics of above-mentioned platform, so Structure of need is compact, consumption
Electrical power is low and especially meets laser acquisition/range-measurement system of submerged applications wave band.
The present invention is to analyze following weakness bases existing for the domestic and international water surface/underwater laser ranging/Detection Techniques before this
It is proposed on plinth, such as
1, it is suitble to the 532nm laser of underwater operation both at home and abroad at present, mostly by two times of the solid pulse laser of 1064nm
Obtained from frequency, because electro-optical efficiency is low, the compression of laser scale difficulty, therefore more difficult suitable side crops industry platform；
2, conventional on-board laser system usually carries out laser scanning to the water surface with simple beam, it is more difficult to take into account scanning range, search
Suo Sudu and ranging are apart from three's demand, if will increase carrier aircraft burden by the number of channels for increasing laser scanning；
3, according to the light wave reflection rate finding of typical materials several to existing seabed it is found that underwater mud, sand or plant
The optimal wavelength for being carried out laser acquisition is 460nm and 560nm, though optimal laser should be semiconductor laser, the wave
The laser power of section is not high, and price is but very high.
The present invention is exactly to propose in order to solve the above problem with problem.
Summary of the invention
The purpose of the present invention is be acquisition in the high-power of the underwater transmission band of 460-560nm, high efficiency, legerity type laser
Device is obtained using 915nm and 1120nm semiconductor laser by two frequencys multiplication of the nonlinear crystals such as KDP, is realized a kind of suitable
LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system for airborne/submerged applications.
LD fundamental frequency of the present invention/frequency multiplication multiwavelength laser complex probe/range-measurement system is realized by following proposal.The present invention
Using to current technology maturation and the higher 915nm and 1120nm semiconductor laser of power, pass through the nonlinear crystals such as KDP times
Frequency realizes the output of 460nm and 560nm optical maser wavelength；When the submarine target laser ranging for water surface motor platform, enable
915nm/460nm and 1120nm/560nm two, respectively from both direction ranging, expands the waters range of covering to laser；When being used for
When underwater manoeuvre platform is to habitata, two optical maser wavelength outputs of 460nm and 560nm are enabled, seabed Jie qualitative attribution is detected, is
Motor platform finds suitable landing point, is a kind of airborne/underwater dual-purpose four wavelength laser detection of binary channels/compound system of ranging
System.
LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system by LD915nm laser, LD1120nm laser,
915nm frequency-doubling crystal, 1120nm frequency-doubling crystal, optical emission system, laser receiver system and data comprehensive treatment device composition.Its
In, LD915nm laser and LD1120nm laser are semiconductor pulse laser；LD915nm laser and 915nm frequency multiplication are brilliant
Body forms dual-wavelength laser output channel (abbreviation channel 1)；LD1120nm laser and 1120nm frequency-doubling crystal group 1120nm/
560nm dual-wavelength laser output channel (abbreviation channel 2)；Optical emission system by corresponding channel 1 and channel 2 Laser emission light
It learns component, close beam/beam splitting scanner composition；Laser receiver system receives optical module by broadband and four highly sensitive laser are visited
Survey device composition, can receiving channel 1,2 emits simultaneously laser echo signal, and respectively by four with different wave length optical filter
Laser detector；Aggregation of data processor is with providing ranging distance, target reflectivity and seabed material class according to the calculating of obtained information
Type.
When LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system is used for the airborne water surface/submarine target ranging,
Emit two multichannel laser of 915nm/465nm and 1120nm/560nm simultaneously.Wherein, two long wavelength lasers of 915nm and 1120nm
Realize the ranging of carrier aircraft to the water surface；465nm and 560nm two underwater transmission peak wavelengths realize the ranging of carrier aircraft to submarine target.Light
It is projected two sides perpendicular to onboard flight by the conjunction beam/beam splitting scanner learned in emission system respectively, according to laser
The flying height of the angle of divergence and carrier aircraft controls the scanning range and speed of two multichannel lasers.
When LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system for underwater manoeuvre platform to submarine target or
When seabed medium is detected, while emitting 460nm and 560nm dual wavelength, is scanned by the conjunction beam in optical emission system/beam splitting
Device is closed beam and is scanned；Laser receiver system receives 460nm the and 560nm return laser beam of underwater reflective, and is pre-stored in
The laser reflectivity data of seabed sandstone, soil and plant in aggregation of data processor etc. are contrasted, and are provided and are situated between to seabed
The basic judgement of matter type.
It closes beam/beam splitting scanner to be made of two independent microreflection eyeglasses, driving circuit and sweep mechanism, two independences
Microreflection eyeglass change respectively under the control of wobble drive circuit, through sweep mechanism the respective gradient of two mirror surfaces,
Pivot angle range and swing speed.When two eyeglass normal directions are consistent, channel 1 is consistent with the Laser emission direction in channel 2；Two eyeglasses
When normal direction difference, the Laser emission direction in two channels and scanning speed are different.Close beam/beam splitting scanner control flexibly, in fact
It is good with property.
Detailed description of the invention
Fig. 1 LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system the general frame
Fig. 2 closes beam/beam splitting scanner schematic diagram
Tri- kinds of Fig. 3 typical underwater medium spectral reflectivity curves
Specific embodiment
LD fundamental frequency of the present invention/frequency multiplication multiwavelength laser complex probe/range-measurement system specific embodiment can be divided into airborne
Laser ranging is described with two kinds of underwater laser detection applications.LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system
By LD915nm laser 1, LD1120nm laser 2,915nm frequency-doubling crystal 3,1120nm frequency-doubling crystal 4, optical emission system
5, laser receiver system 6 and data comprehensive treatment device 7 form.
Wherein, LD915nm laser 1 and LD1120nm laser 2 are semiconductor pulse laser；LD915nm laser 1
Dual-wavelength laser output channel (abbreviation channel 1) is formed with 915nm frequency-doubling crystal 3；LD1120nm laser 2 and 1120nm times
Frequency crystal 4 forms 1120nm/560nm dual-wavelength laser output channel (abbreviation channel 2)；Optical emission system 5 is by corresponding channel 1
Laser emission optical module, conjunction beam/beam splitting scanner composition with channel 2；Laser receiver system 6 receives optics group by broadband
Part and four highly sensitive laser detectors compositions, can receiving channel 1,2 emits simultaneously laser echo signal, and respectively by four
Laser detector with different wave length optical filter；Aggregation of data processor 7 is with providing ranging distance, mesh according to the calculating of obtained information
Mark reflectivity and seabed material type.
When LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system is used for the airborne water surface/submarine target ranging,
Emit two multichannel laser of 915nm/465nm and 1120nm/560nm simultaneously.Wherein, two long wavelength lasers of 915nm and 1120nm
Realize the ranging of carrier aircraft to the water surface；465nm and 560nm two underwater transmission peak wavelengths realize the ranging of carrier aircraft to submarine target.Light
It is projected two sides perpendicular to onboard flight by the conjunction beam/beam splitting scanner learned in emission system 5 respectively, according to laser
The flying height of the angle of divergence and carrier aircraft controls the scanning range and speed of two multichannel lasers.
When LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system for underwater manoeuvre platform to submarine target or
When seabed medium is detected, while emitting 460nm and 560nm dual wavelength, is swept by conjunction beam/beam splitting in optical emission system 5
Device is retouched to be closed beam and be scanned；Laser receiver system 6 receives 460nm the and 560nm return laser beam of underwater reflective, and prestores
The laser reflectivity data of seabed sandstone, soil and plant in aggregation of data processor 7 etc. are contrasted, and are provided to seabed
The basic judgement of media type.
The advantages of LD fundamental frequency of the present invention/frequency multiplication multiwavelength laser complex probe/range-measurement system, is:
1, based on using existing commercial high-power long wave 915/1120nmLD laser, pass through conventional two frequency multiplication skills
Art, so that it may high-power, compact-sized and moderate 460nm and 560nm laser output is directly obtained, it is underwater anxious to solve
An effective solution approach is found in the two wavelength lasers output needed.
2, seabed medium is detected simultaneously using 460nm and two wavelength laser of 560nm, and with the data in database
It is comprehensively compared, the identification probability to underwater material can be greatly improved.
3, the used conjunction beam/beam splitting being made of two independent microreflection eyeglasses, driving circuit and sweep mechanisms is swept
Device is retouched, scanning number, angular range and the scanning speed of laser can be easily changed, not only there is number scalability,
And sweep mechanism is flexible, practical.
Claims (5)
1. the present invention relates to a kind of LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement systems.To obtain in 460-560nm
Underwater the high-power of transmission band, high efficiency, legerity type laser, the present invention are higher with current technology maturation and power
915nm and 1120nm semiconductor laser is basic frequency laser output, realizes 915nm laser respectively using nonlinear crystals such as KDP
Two frequency multiplication 457.5nm (being known as 460nm with lower aprons) and 1120nm laser two frequency multiplication 560nm laser output.For the water surface
Motor platform to when underwater laser ranging, 915nm/460nm and 1120nm/560nm two to laser respectively to different directions ranging,
Expand Water Area Covered by VTS VTS；When for underwater manoeuvre platform to habitata, using two laser of 460nm and 560nm to seabed medium
Detection, find suitable landing point for motor platform, be a kind of airborne/underwater dual-purpose laser acquisition/ranging composite system.
2. in claim 1, LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system by LD915nm laser,
LD1120nm laser, 915nm frequency-doubling crystal, 1120nm frequency-doubling crystal, optical emission system, laser receiver system and data are comprehensive
Close processor composition.Wherein, LD915nm laser and LD1120nm laser are semiconductor pulse laser；LD915nm laser
Device and 915nm frequency-doubling crystal composition 915nm/460nm dual-wavelength laser output channel (abbreviation channel 1)；LD1120nm laser
1120nm/560nm dual-wavelength laser output channel (abbreviation channel 2) is formed with 1120nm frequency-doubling crystal；Optical emission system by
The Laser emission optical module in corresponding channel 1 and channel 2 closes beam/beam splitting scanner composition；Laser receiver system is connect by broadband
It receives optical module and four highly sensitive laser detectors with different wave length optical filter forms, sent out with receiving channel 1,2 simultaneously
4 laser echo signals penetrated；Aggregation of data processor provides the parameters such as ranging distance and target reflectivity according to obtained information.
3. in claim 1, when LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system is used for the airborne water surface/underwater mesh
Mapping away from when, while emitting 915nm/465nm and four, two channel 1120nm/560nm laser.915nm and 1120nm two long
Ranging of the wavelength laser for carrier aircraft to the water surface, two short wavelength lasers transmitted under water of 465nm and 560nm are for carrier aircraft to water
The ranging of lower target, two apart from its difference be the water surface the distance between to submarine target.Conjunction beam/beam splitting in optical emission system
It is projected two sides perpendicular to onboard flight by scanner respectively, according to the flying height of laser beam divergence and carrier aircraft,
Control the scanning range and speed of two multichannel lasers.
4. in claim 1, when LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system is used for underwater manoeuvre platform pair
When submarine target or seabed medium are detected, while emitting 460nm and 560nm dual wavelength, by the conjunction in optical emission system
Beam/beam splitting scanner is closed beam and is scanned；460nm the and 560nm laser that laser receiver system receives underwater reflective returns
Wave is contrasted with the laser reflectivity data of the seabed sandstone, soil and the plant that are pre-stored in aggregation of data processor etc., is given
Out to the basic judgement of seabed media type.
5. conjunction beam/beam splitting scanner in claim 2 is by two independent microreflection eyeglasses, driving circuit and sweep mechanism group
At it is each to change two mirror surfaces by sweep mechanism under the control of wobble drive circuit respectively for two independent microreflection eyeglasses
From gradient, pivot angle range and swing speed.When two eyeglass normal directions are consistent, the Laser emission direction in channel 1 and channel 2
Unanimously；When two eyeglass normal direction differences, the Laser emission direction in two channels and scanning speed are different.Close beam/beam splitting scanner
Control is flexible, practicability is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458887.7A CN109239728A (en) | 2018-05-15 | 2018-05-15 | LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458887.7A CN109239728A (en) | 2018-05-15 | 2018-05-15 | LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system |
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| CN109239728A true CN109239728A (en) | 2019-01-18 |
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| CN201810458887.7A Pending CN109239728A (en) | 2018-05-15 | 2018-05-15 | LD fundamental frequency/frequency multiplication multiwavelength laser complex probe/range-measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012031A1 (en) * | 2020-07-16 | 2022-01-20 | 深圳市度彼电子有限公司 | Laser rangefinder employing two light sources |
| CN115201839A (en) * | 2022-09-16 | 2022-10-18 | 成都量芯集成科技有限公司 | Dual-wavelength laser ranging device |
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