CN206945959U - Laser radar and its phased-array laser transmitter unit - Google Patents
Laser radar and its phased-array laser transmitter unit Download PDFInfo
- Publication number
- CN206945959U CN206945959U CN201720668905.5U CN201720668905U CN206945959U CN 206945959 U CN206945959 U CN 206945959U CN 201720668905 U CN201720668905 U CN 201720668905U CN 206945959 U CN206945959 U CN 206945959U
- Authority
- CN
- China
- Prior art keywords
- laser
- phased
- transmitter unit
- path
- beam splitter
- 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
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
It the utility model is related to a kind of laser radar and its phased-array laser transmitter unit.Including laser beam splitter component, light transmitting antenna and multiple phase regulators.Coordinated by laser beam splitter component and multiple smooth transmitting antennas, multi-path laser can be sent.Moreover, adjusting the phase of multi-path laser by phase regulator multi-path laser can be made fixed phase difference to be present, so as to obtain antenna pattern by interference in far field, to form most strong main beam in particular directions, realize scanning.Further, the phase for changing multi-path laser can obtain different antenna patterns, so as to realize comprehensive scanning.Therefore, laser radar just can realize comprehensive monitoring without mechanical gyro unit.Moreover, the speed of Laser Radar Scanning is determined by phase-adjusted frequency, without being limited by mechanical gyro unit rotary speed, therefore the sweep speed of laser radar is also faster.Therefore, the small volume of above-mentioned laser radar and its phased-array laser transmitter unit and sweep speed is higher.
Description
Technical field
Technical field of laser detection is the utility model is related to, more particularly to a kind of laser radar and its phased-array laser transmitting
Unit.
Background technology
Laser radar is a kind of sensor with lidar light detection and ranging, its principle and common sound radar and sonar class
Seemingly.Go out laser pulse to objective emission with emitter, surveyed by the delay and intensity of reception device measurement return pulse
Measure the distance and reflectivity of target.
To realize comprehensive monitoring, radar need to carry out the scanning in 360 degree of spaces.Traditional radar is typically driven using machinery
Dynamic pattern, i.e. mechanical device drive the transmitter unit all-direction rotation of radar, to realize 360 degree of scannings.But such thunder
Up to the bulky mechanical device of use so that sweep speed is slow.Moreover, mechanical rotation device is difficult to continue normally after failure
Use.
Similar with traditional ordinary radar, laser radar in the market also carries out 360 using the mode of mechanical rotation
The spacescan of degree.This has resulted in laser radar as conventional radar, and product has that volume is big, scanning is slow, price is high
The shortcomings that with being difficult to continue normal use after mechanical device failure, so as to be unfavorable for large-scale use in consumer electronics field.
Utility model content
Based on this, it is necessary to for the problem of existing laser radar volume is big, scanning is slow, there is provided a kind of small volume and sweep
Retouch the higher laser radar of speed and its phased-array laser transmitter unit.
A kind of phased-array laser transmitter unit, including：
Laser beam splitter component, including light incident side and multiple light exit sides, laser beam is after the light incident side incidence
It is emitted respectively from the multiple light exit side, to obtain multi-path laser；
It is multiple to be used to launch the light transmitting antennas of the multi-path laser respectively, the multiple smooth transmitting antenna respectively with it is described
Multiple light exit sides coordinate, to form laser optical path that is multiple parallel with one another and being transmitted for the multi-path laser；And
Multiple phase regulators, it is respectively arranged on the multiple laser optical path, each phase regulator is used to adjust
The phase of the multi-path laser corresponding to section on the laser optical path.
In one of the embodiments, the laser beam splitter component includes multiple beam splitters, and the multiple optical splitter
Be in turn divided into multiple levels according to the distance with the light incident side, wherein the incidence end of beam splitter described in next level with
The exit end connection of beam splitter described in upper level, and the incidence end of the beam splitter of the first level is that the light is incident
End, the exit end of the beam splitter of last level is the light exit side.
In one of the embodiments, the beam splitter is one-to-two beam splitter, and the multiple optical splitter is divided into K
Individual level, the quantity of the light exit side is 2KIt is individual.
In one of the embodiments, the beam splitter is multimode interference or Y type knots.
In one of the embodiments, in addition to it is arranged at the photo-coupler of the light incident side.
In one of the embodiments, the photo-coupler is edge couplers or grating coupler.
In one of the embodiments, the smooth transmitting antenna is grating coupler.
In one of the embodiments, the phase regulator is to include fiber waveguide and for adding to the fiber waveguide
The microheater of heat, the fiber waveguide are located on the laser optical path.
In one of the embodiments, the phase regulator includes Pn sections and for adjusting the Pn sections both end voltage
Voltage regulator, the Pn sections are on the laser optical path.
A kind of laser radar, including：
Phased-array laser transmitter unit as any one of above-mentioned preferred embodiment；
Echo receiving unit, for receiving the multi-path laser to interfere in far field, the radiation main beam to be formed is anti-through subject matter
Penetrate caused echo-signal；And
With the phased-array laser transmitter unit and the processor of Echo receiving unit communication connection.
Above-mentioned laser radar and its phased-array laser transmitter unit, matched somebody with somebody by laser beam splitter component and multiple smooth transmitting antennas
Close, multi-path laser can be sent.Moreover, by phase regulator regulation multi-path laser can be made fixed phase difference to be present, so that
Far field obtains antenna pattern by interference, to form most strong main beam in particular directions, realizes scanning.Further,
The phase change of multi-path laser can obtain different antenna patterns in far field, so that the direction of most strong main beam is realized
Dynamic adjusts, and finally realizes comprehensive scanning.Therefore, laser radar just can realize comprehensive prison without mechanical gyro unit
Survey, so as to be advantageous to reduce volume.Further, the speed of Laser Radar Scanning is determined by phase-adjusted frequency, without
Limited by mechanical gyro unit rotary speed, therefore the sweep speed of laser radar is also faster.Therefore, above-mentioned laser radar and
The small volume and sweep speed of its phased-array laser transmitter unit are higher.
Brief description of the drawings
Fig. 1 is the module diagram of laser radar in the embodiment of the utility model one；
Fig. 2 is the structural representation of phased-array laser transmitter unit in the utility model one embodiment.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can come in many different forms
Realize, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to of the present utility model
The understanding of disclosure more thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
Referring to Fig. 1, laser radar 10 in the embodiment of the utility model one include phased-array laser transmitter unit 100,
Echo receiving unit 101 and processor 102.
Phased-array laser transmitter unit 100 is used to send multi-path laser, and laser can produce echo letter after subject matter reflects
Number.
Specifically, it is that relevant (frequency is identical and with solid between the multichannel light that phased-array laser transmitter unit 100 is sent
Phase bit is poor).Therefore, multi-path laser can form specific antenna pattern after interfering in far field.I.e. in a particular direction
A branch of most strong main beam can be formed, other weaker sub-beams are had in other direction of the launch.Main beam and sub-beams are simultaneously
It is not parallel, but there is corresponding angle.Laser radar 10 runs into target in use, the echo-signal gathered is the main beam
The signal obtained after thing reflection.
Echo receiving unit 101 is used for receives echo-signal.Processor 102 carries out Treatment Analysis to echo-signal, so as to
Obtain the parameters such as shape, the distance of subject matter.
Also referring to Fig. 2, the embodiment of the utility model one also provides a kind of phased-array laser transmitter unit 100, including
Laser beam splitter component 110, light transmitting antenna 120 and phase regulator 130.
Laser beam splitter component 110 includes light incident side and multiple light exit sides.Laser beam divides after light incident side incidence
It is not emitted from multiple light exit sides, to obtain multi-path laser.When laser radar 10 works, laser light that LASER Light Source 20 is sent
Beam enters laser beam splitter component 110 from light incident side, is finally emitted from light exit side, obtains more beam power identical laser signals
(i.e. " multi-path laser ").
In the present embodiment, phased-array laser transmitter unit 100 also (is schemed not including being arranged at the photo-coupler of light incident side
Show).
Specifically, photo-coupler is arranged between LASER Light Source 20 and laser beam splitter component 110, sent for LASER Light Source 20
Laser beam incident interface.During laser beam incidence, photo-coupler need to be passed through, laser beam splitter component 110 could be entered.Light
Excessive loss when coupler can prevent laser beam incidence, so as to avoid the transmission power of phased-array laser transmitter unit 100 from dropping
It is low, and then ensure the scanning effect of laser radar 100.
Light transmitting antenna more than 120.Specifically in the present embodiment, multiple smooth transmitting antennas 120 are set up in parallel, with one-dimensional
Matrix form distribution is more.Individual light transmitting antenna 120 coordinates with multiple light exit sides respectively, to be formed multiple parallel with one another and supplied more
The laser optical path of road laser transmission.Specifically, light exit side can be connected with light transmitting antenna 120 by fiber waveguide, to realize light
Beam transmits therebetween.Wherein, fiber waveguide can be silicon, optical fiber etc..Therefore, the multi-path laser signal sent through light exit side
Light transmitting antenna 120 can be entered, and be further transmitted into by multiple smooth transmitting antennas 120 in space.
Due to being parallel with one another between multiple laser optical paths, thus it is relatively independent between each laser optical path.Even if wherein
One laser optical path (fiber waveguide of light transmitting antenna 120 or connection light transmitting antenna 120) is broken down, and also remaining will not be swashed
Light light path has an impact.Therefore, the function of phased-array laser transmitter unit 100 still can be normally real when there is local fault
It is existing, so as to improve the reliability of laser radar 10.
Phase regulator 130 is multiple, and is respectively arranged on multiple laser optical paths.Wherein, each phase regulator 130
For adjusting the phase of the multi-path laser on corresponding laser optical path.
When adjusting each laser optical path on one-dimensional matrix simultaneously using phase regulator 130, per light transmitting antenna 120
Launch the laser signal of out of phase, so as to generate a specific antenna pattern by interfering in far field.This is with regard to suitable
In a solid-state optical phased array, when an optical phased array includes substantial amounts of light transmitting antenna 120, high-precision spoke can be obtained
Directional diagram is penetrated, and very thin laser beam can be obtained.This disclosure satisfy that beam-forming and manipulation in solid-state laser radar
It is required that and can generate the radiated far field needed for many practical applications distribution.
The multi-path laser signal that multiple smooth transmitting antennas 120 are sent interferes in the distance, so as to form specific direction
Most strong beam, realize the scanning in particular range.And multi-path laser signal interfere the direction of obtained most strong beam with it is every
The phase of laser signal is relevant all the way.Therefore, the phase of multi-path laser is adjusted respectively according to preset rules by phase regulator 130
Position, multi-path laser can be made to obtain different scanning ranges by interference in the distance, so that scanning range is dynamic, and then
Realize comprehensive scanning.
Further, the speed that laser radar 10 scans carries out phase-adjusted frequency by phase regulator 130 and determined, and
It will not be limited by mechanical gyro unit rotary speed.And phase-adjusted speed can realize circuit control, response is rapid, therefore
The sweep speed of laser radar 10 is also faster.
Further, since each laser optical path corresponds to a phase regulator 130, therefore it is directed to each light transmitting antenna 120
The laser signal sent can be adjusted individually, be independent of each other.
In the present embodiment, laser beam splitter component 110 includes multiple beam splitters 111, and multiple optical splitters 111 according to
The distance of light incident side is in turn divided into multiple levels.Wherein, the incidence end of next level beam splitter 111 and upper level light point
The exit end connection of beam device 111, and the incidence end of the beam splitter 111 of the first level is light incident side, the light of last level divides
The exit end of beam device 111 is light exit side.
Specifically, beam splitter 111 is used to a branch of incident light being divided into multi beam emergent light, so that the power of incident light point
Dissipate.Wherein, incidence end of the laser beam directly by the beam splitter 111 of the first level is incident；And multi-path laser is then from final layer
The exit end outgoing of the beam splitter 111 of level.The laser beam that LASER Light Source 20 is sent after multiple beam splitters 111, its
Power averaging is allocated in multi-path laser.
Further, in the present embodiment, beam splitter 111 is one-to-two beam splitter, and multiple optical splitters 111 are divided into
K level, the quantity of light exit side is 2KIt is individual.
Wherein, K is the integer more than 2.Laser beam obtains two beams and gone out after the beam splitter 111 by the first level
Light is penetrated, two beam emergent lights obtain 4 beam emergent lights after the second level.By that analogy, until by last level (K levels)
Beam splitter 111 after, just obtain 2KBeam emergent light, namely foregoing multi-path laser.
It is pointed out that in other embodiments, laser beam splitter 111 can also be one point of other kinds of beam splitting of the fourth class
Device.Now, the quantity of light exit side and the quantity of multi-path laser are then 4KIt is individual.
In the present embodiment, beam splitter 111 is multimode interference or Y type knots.
In the present embodiment, photo-coupler is edge couplers (edge couple) or grating coupler (grating
coupler)。
In the present embodiment, light transmitting antenna 120 is grating coupler.
Wherein, beam splitter 111, light transmitting antenna 120, photo-coupler and phase regulator 130 can be integrated on chip,
So as to further reduce the volume of phased-array laser transmitter unit 100 and laser radar 10.Specifically, beam splitter 111, light are sent out
Penetrating antenna 120, photo-coupler and phase regulator 130 can be by based on " the silicon integreted phontonics light path skill compatible with CMOS technology
Art " is implemented on chip.
In the present embodiment, phase regulator 130 be include fiber waveguide and for heated to fiber waveguide miniature plus
Hot device, fiber waveguide are located on laser optical path.
Specifically, fiber waveguide is located on laser optical path, then multi-path laser can pass through fiber waveguide in transmitting procedure.Laser exists
The phase propagated in fiber waveguide is determined by its effective refractive index (effective refractive index) in fiber waveguide.
And effective refractive index changes with the temperature of fiber waveguide, i.e., " thermo-optic effect ".Therefore, fiber waveguide is carried out using microheater
Heating stops heating the temperature that just can change fiber waveguide, so as to adjust the phase of corresponding multi-path laser.
In another embodiment, phase regulator 130 includes the voltage tune that Pn is saved and both end voltage is saved for adjusting Pn
Device is saved, Pn sections are on laser optical path.
Specifically, effective refractive index is also relevant with the concentration of carrier in fiber waveguide (electronics and hole), i.e. " plasma color
Dissipate effect ".Pn knots both ends add different voltages that the concentration of carrier in fiber waveguide can be caused to change, so as to change effective folding
Penetrate rate, and then the phase of multi-path laser corresponding to change.
Above-mentioned laser radar 10 and its phased-array laser transmitter unit 100, sent out by laser beam splitter component 110 and multiple light
Penetrate antenna 120 to coordinate, multi-path laser can be sent.Moreover, being adjusted by phase regulator 130 can make multi-path laser fixation be present
Phase difference, so as to obtain antenna pattern by interference in far field, to form most strong main beam in particular directions, realization is swept
Retouch.Further, the phase change of multi-path laser can obtain different antenna patterns in far field, so that most strong key light
The direction of beam realizes that dynamic adjusts, and finally realizes comprehensive scanning.Therefore, laser radar 10 just can without mechanical gyro unit
Comprehensive monitoring is realized, so as to be advantageous to reduce volume.Further, the speed that laser radar 10 scans is by phase-adjusted frequency
Rate determines, without being limited by mechanical gyro unit rotary speed, therefore the sweep speed of laser radar 10 is also faster.Cause
This, the small volume and sweep speed of above-mentioned laser radar 10 and its phased-array laser transmitter unit 100 are higher.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
- A kind of 1. phased-array laser transmitter unit, it is characterised in that including：Laser beam splitter component, including light incident side and multiple light exit sides, laser beam are distinguished after the light incident side incidence It is emitted from the multiple light exit side, to obtain multi-path laser；It is multiple to be used to launch the light transmitting antennas of the multi-path laser respectively, the multiple smooth transmitting antenna respectively with it is the multiple Light exit side coordinates, to form laser optical path that is multiple parallel with one another and being transmitted for the multi-path laser；AndMultiple phase regulators, it is respectively arranged on the multiple laser optical path, each phase regulator is used for regulation pair The phase for the multi-path laser on the laser optical path answered.
- 2. phased-array laser transmitter unit according to claim 1, it is characterised in that the laser beam splitter component includes multiple Beam splitter, and the multiple optical splitter is in turn divided into multiple levels according to the distance with the light incident side, wherein next The exit end connection of beam splitter described in the incidence end and upper level of beam splitter described in level, and the light of the first level point The incidence end of beam device is the light incident side, and the exit end of the beam splitter of last level is the light exit side.
- 3. phased-array laser transmitter unit according to claim 2, it is characterised in that the beam splitter is one-to-two beam splitting Device, and the multiple optical splitter is divided into K level, the quantity of the light exit side is 2KIt is individual.
- 4. phased-array laser transmitter unit according to claim 2, it is characterised in that the beam splitter is multimode interference Or Y type knots.
- 5. phased-array laser transmitter unit according to claim 1, it is characterised in that also include being arranged at the light incident side Photo-coupler.
- 6. phased-array laser transmitter unit according to claim 5, it is characterised in that the photo-coupler is edge couplers Or grating coupler.
- 7. phased-array laser transmitter unit according to claim 1, it is characterised in that the smooth transmitting antenna couples for grating Device.
- 8. according to any one of claim 1 to the 7 phased-array laser transmitter unit, it is characterised in that the phase regulator It is to include fiber waveguide and the microheater for being heated to the fiber waveguide, the fiber waveguide is located at the laser optical path On.
- 9. according to any one of claim 1 to the 7 phased-array laser transmitter unit, it is characterised in that the phase regulator The voltage regulator of both end voltage is saved and saved for adjusting the Pn including Pn, and the Pn sections are on the laser optical path.
- A kind of 10. laser radar, it is characterised in that including：Phased-array laser transmitter unit as described in above-mentioned any one of claim 1~9；Echo receiving unit, for receiving the multi-path laser to interfere in far field, the radiation main beam to be formed reflects institute through subject matter Caused echo-signal；AndWith the phased-array laser transmitter unit and the processor of Echo receiving unit communication connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720668905.5U CN206945959U (en) | 2017-06-09 | 2017-06-09 | Laser radar and its phased-array laser transmitter unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720668905.5U CN206945959U (en) | 2017-06-09 | 2017-06-09 | Laser radar and its phased-array laser transmitter unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945959U true CN206945959U (en) | 2018-01-30 |
Family
ID=61363884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720668905.5U Active CN206945959U (en) | 2017-06-09 | 2017-06-09 | Laser radar and its phased-array laser transmitter unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206945959U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693505A (en) * | 2017-06-09 | 2018-10-23 | 深圳市涵光半导体有限公司 | Laser radar and its phased-array laser transmitter unit |
| WO2019237599A1 (en) * | 2018-06-14 | 2019-12-19 | 昂纳信息技术（深圳）有限公司 | Solid-state light source of laser radar and laser radar |
-
2017
- 2017-06-09 CN CN201720668905.5U patent/CN206945959U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693505A (en) * | 2017-06-09 | 2018-10-23 | 深圳市涵光半导体有限公司 | Laser radar and its phased-array laser transmitter unit |
| WO2019237599A1 (en) * | 2018-06-14 | 2019-12-19 | 昂纳信息技术（深圳）有限公司 | Solid-state light source of laser radar and laser radar |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108693505A (en) | Laser radar and its phased-array laser transmitter unit | |
| CN207074262U (en) | Laser radar and its two dimensional phased battle array laser emission element | |
| JP7303925B2 (en) | Multi-wavelength lidar design | |
| CN111722237B (en) | Laser radar detection device based on lens and integrated beam transceiver | |
| CN115639543B (en) | Frequency modulation continuous wave laser radar and automatic driving equipment | |
| WO2020224007A1 (en) | One-dimensional optical phased array-based three-dimensional scanning laser radar | |
| CN208224485U (en) | A kind of multi-line laser radar | |
| CN115685147B (en) | Frequency modulation continuous wave laser radar and automatic driving equipment | |
| CN106443634A (en) | Solid-state laser radar system | |
| CN106371085A (en) | Laser radar system based on optical fiber array | |
| CN107329132A (en) | A kind of lidar transmit-receive antenna and distance-finding method based on optical phase arrays | |
| CN207008051U (en) | A kind of lidar transmit-receive antenna based on optical phase arrays | |
| CN109782256A (en) | A kind of laser radar | |
| CN109799510A (en) | Distance measurement sensor | |
| CN109752702A (en) | A kind of laser radar | |
| CN206945959U (en) | Laser radar and its phased-array laser transmitter unit | |
| JP2021139869A (en) | Laser transmitter/receiver module for rider | |
| CN109444849A (en) | Phased-array laser radar | |
| WO2024051043A1 (en) | Laser radar transceiving assembly and laser radar device | |
| CN110456324A (en) | Integrated phased-array laser radar system | |
| CN109444851A (en) | Laser body and phased-array laser radar | |
| CN109444850A (en) | Phased-array laser radar | |
| CN108693513A (en) | Laser radar and its two dimensional phased battle array laser emission element | |
| CN209590264U (en) | Phased-array laser radar | |
| WO2018006697A1 (en) | Transceiving device utilized in scan laser radar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |