CN217467176U - Beam splitting module and laser radar transmitting device - Google Patents
Beam splitting module and laser radar transmitting device Download PDFInfo
- Publication number
- CN217467176U CN217467176U CN202221095978.7U CN202221095978U CN217467176U CN 217467176 U CN217467176 U CN 217467176U CN 202221095978 U CN202221095978 U CN 202221095978U CN 217467176 U CN217467176 U CN 217467176U
- Authority
- CN
- China
- Prior art keywords
- light
- splitting module
- stage
- power controller
- beam splitting
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The utility model provides a beam splitting module and laser radar emitter, wherein, this beam splitting module includes: a plurality of beam splitters and a plurality of power controllers; the beam splitter is used for dividing a light beam line entering the beam splitter into a plurality of light beam lines; the plurality of beam splitters are distributed in a multi-stage mode, and the light paths of the plurality of beam splitters are in a multi-branch tree structure; each light beam line divided by the at least one stage of beam splitter is provided with a power controller; the power controller is used for controlling the on-off of the light beam circuit. Through the embodiment of the utility model provides a beam splitting module can set up corresponding power controller according to the actual demand in the beam line that every grade of beam splitter was divided for can cut off or communicate the route of beam line transmission through the control of different power controller, and then can control the beam splitting result of initial beam, realize the rational distribution to initial beam power, make the laser radar emitter that adopts this beam splitting module more be applicable to the detection of more remote distance.
Description
Technical Field
The utility model relates to an optics phased array technical field particularly, relates to a beam splitting module and laser radar emitter.
Background
The existing laser radar transmitting device can be a multi-line optical phased array, and specifically comprises: the device comprises a beam splitting module and an emitting module. In the case of power equalization, after the beam splitting module equally divides the incident light into a plurality of sub-paths (e.g., k sub-paths), the light corresponding to each sub-path is equally divided into 1/k of the incident light; however, in the case that each sub-path passes through the corresponding emitting module, the 1/k parts of incident light can generate m light spots and n light spots in the x direction and the y direction of the far field, respectively, for example, in the case that a plurality of sub-paths form k m × n point clouds through the emitting modules, each light spot obtained in the far field is only 1/(k × m × n) parts of the incident light, and the light intensity of each projected light spot is very limited, so that the conventional laser radar emitting device is not suitable for long-distance detection.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the embodiment of the utility model is to provide a beam splitting module and laser radar emitter.
In a first aspect, an embodiment of the present invention provides a beam splitting module, including: a plurality of beam splitters and a plurality of power controllers; the beam splitter is used for dividing a light beam line emitted into the beam splitter into a plurality of light beam lines; the plurality of beam splitters are distributed in a multi-stage mode, and the light paths of the plurality of beam splitters are in a multi-branch tree structure; each light beam line divided by the at least one stage of beam splitter is provided with the power controller; the power controller is used for controlling the on-off of the light beam circuit.
Optionally, the power controller is arranged in each light beam line divided by the last-stage beam splitter, and the last-stage beam splitter is a stage of beam splitter farthest from the light incident side of the beam splitting module.
Optionally, in a case where the power controller is provided in each beam line divided by the multi-stage beam splitter, the power controllers of the other stages except the current stage are set to be in an on state; and the power controller of the current stage is a corresponding power controller in the stage needing to be controlled currently.
Optionally, the power controller comprises a semiconductor optical amplifier type optical switch, an electro-optical effect mach-zehnder interference type optical switch, a thermo-optical effect mach-zehnder interference type optical switch, a micro-ring type optical switch, or a micro-electromechanical system optical switch.
Optionally, the beam splitter comprises a multimode interferometer.
In a second aspect, the embodiment of the present invention further provides a laser radar transmitting device, including: any one of the beam splitting module, the phased array emission module and the light source; the light source is arranged on the light incidence side of the beam splitting module and used for emitting an initial light beam to the beam splitting module; the beam splitting module is used for dividing the initial light beam into a plurality of target light beams; phased array emission module sets up beam splitting module's light-emitting side includes a plurality of phased array emission unit, a plurality of phased array emission unit with many target beam one-to-one, phased array emission unit is used for converting the form that contains at least one light spot with the target beam who corresponds to throw to the target area.
Optionally, the phased array transmission unit comprises a phase shifter and a transmitter; the phase shifter is arranged between the beam splitting module and the emitter, the phase shifter is used for controlling the phase difference of the corresponding target beams, and the emitter is used for converting the modulated target beams into a form containing at least one light spot and projecting the light spot to a target area.
Optionally, the transmitter comprises at least one of a grating coupler, a non-uniform waveguide grating, a dammann grating, a super surface.
Optionally, the form of the at least one spot comprises: in the form of a row of light spots, in the form of a column of light spots or in the form of a lattice.
Optionally, the light source is a vertical cavity laser.
The embodiment of the utility model provides an in the above-mentioned scheme that the first aspect provided, because the embodiment of the utility model provides a can set up corresponding power controller according to actual demand in the beam line that every grade of beam splitter is divided for can cut off or communicate the route of beam line transmission through the control of different power controller, and then can control the beam splitting result of initial beam, realize the rational distribution to initial beam power, make the laser radar emitter that adopts this beam splitting module more be applicable to the detection of more remote distance.
The embodiment of the utility model provides an in the scheme that above-mentioned second aspect provided, can be through setting for the beam splitting result of the beam splitting module in this laser radar transmission module to control the power distribution of initial light beam, with light intensity, the scanning range that changes final directive target area's scanning laser.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a beam splitting module according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a beam splitting module according to an embodiment of the present invention, in which a power controller is only disposed in two beam paths divided by the beam splitter of the first stage;
fig. 3 is a schematic diagram illustrating "a power controller is provided in each beam path divided by the beam splitter of the last stage" in the beam splitting module according to the embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a laser radar transmitting apparatus provided in an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a phased array transmitting unit in a laser radar transmitting apparatus provided by an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a laser radar transmitting apparatus according to an embodiment of the present invention, in which only one target beam is transmitted;
fig. 7 is a schematic diagram illustrating another laser radar transmitting apparatus according to an embodiment of the present invention, which transmits only one target beam;
fig. 8 shows a schematic diagram of transmitting all target beams in a laser radar transmitting apparatus according to an embodiment of the present invention.
Icon:
the system comprises a 1-beam splitting module, a 2-phased array transmitting module, a 3-light source, an 11-beam splitter, a 2-11-second-stage beam splitter, a 3-11-third-stage beam splitter, a 12-power controller, a 1-12-first-stage power controller, a 21-phased array transmitting unit, a 211-phase shifter and a 212-transmitter.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The embodiment of the utility model provides a beam splitting module, it is shown with reference to figure 1, this beam splitting module includes: a plurality of beam splitters 11 and a plurality of power controllers 12; the beam splitter 11 is configured to divide a beam line incident to the beam splitter 11 into a plurality of beam lines; the plurality of beam splitters 11 are distributed in a multi-stage manner, and the light paths of the plurality of beam splitters 11 are in a multi-branch tree structure; each light beam line divided by the at least one stage of beam splitter 11 is provided with a power controller 12; the power controller 12 is used for controlling the on-off of the light beam circuit; the left side of the beam splitting module is shown as the light incident side in fig. 1.
The embodiment of the utility model provides an among the beam splitting module, beam splitter 11 can divide one of them beam line with penetrating, and this beam line can be divided into many beam line after this beam splitter 11, and wherein, beam splitter 11 can be divided the form of the power with the partition of this beam line with the partition to beam line, also can be with the power of this beam line partition that varies according to a certain proportion. The embodiment of the utility model provides an in, carry out the overall arrangement with a plurality of beam splitters 11 through the mode of arranging in grades, each level all corresponds has at least one beam splitter 11, and beam splitter 11 of present level is used for continuing dividing into many beam lines with a beam line that 11 beam splitters of last level divide to transmit respectively to beam splitter 11 of next level at many beam lines that present level divide, realize the multistage beam splitting, finally can divide into more many light beams with a light beam. The plurality of beam splitters 11 divide the beam line step by step, so that the light path in the beam splitting module has a multi-branch tree structure or a binary tree structure, and the beam splitters 11 in the beam splitting module are nodes of the multi-branch tree structure or the binary tree structure.
For example, referring to fig. 1, the beam splitting module may include 7 beam splitters 11 capable of dividing the power of one beam line equally, and arranged in a three-stage arrangement. When the number of the first-stage beam splitters 11 (for example, the first-stage beam splitter 11 disposed closest to the light incident side of the beam splitting module, that is, the leftmost first-stage beam splitter 11 in fig. 1) is 1, it may be determined that the layout structure of the beam splitting module is as shown in fig. 1, and the following steps are performed from left to right: 1 first-stage beam splitter 11 (11 is shown in fig. 1), 2 second-stage beam splitters 11 (2-11 is shown in fig. 1), and 4 third-stage beam splitters 11 (3-11 is shown in fig. 1). In the embodiment of the present invention, in a case of making the beam splitter 11 of the first stage as the beam splitter 11 of the current stage, the beam splitter 11 of the first stage can divide one beam line (such as the initial beam line) injected therein into 2 beam lines, and inject the divided 2 beam lines into the beam splitter 11 of the corresponding next stage (the beam splitter 11 of the second stage) respectively; then, the first-stage beam splitter 11 may be made to be the previous-stage beam splitter 11, and the two next-stage beam splitters 11 (the second-stage beam splitter 11) corresponding to the first-stage beam splitter 11 may be made to be the current-stage beam splitter 11, and the current-stage beam splitter 11 may divide one of the incident light beam lines (for example, one light beam line divided by the first-stage beam splitter 11) into 2 light beam lines, that is, at this time, the two second-stage beam splitters 11 may respectively divide one light beam line into two light beam lines, so as to obtain four divided light beam lines in total, and respectively inject the four divided light beam lines into the corresponding next-stage beam splitter 11 (the third-stage beam splitter 11); finally, each second-stage beam splitter 11 may be made to be a previous-stage beam splitter 11, and the next-stage beam splitter 11 (third-stage beam splitter 11) corresponding to each second-stage beam splitter 11 may be made to be a current-stage beam splitter 11, and each current-stage beam splitter 11 may divide one of the incident light beam lines (for example, one light beam line divided by the second-stage beam splitter 11) into 2 light beam lines, that is, at this time, the four third-stage beam splitters 11 may divide one light beam line into two light beam lines, respectively, to obtain eight divided light beam lines in total, and emit the eight divided light beam lines, respectively, so that the light paths involved in the beam splitting module exhibit a binary tree structure.
In the beam splitting module provided by the embodiment of the present invention, the power controller 12 is a device capable of controlling the beam line where it is located to be open or closed, optionally, the power controller 12 may include a semiconductor optical amplifier type optical switch, an electro-optical effect mach-zehnder interference type optical switch, a thermal optical effect mach-zehnder interference type optical switch, a micro-ring type optical switch, or a micro-electromechanical system optical switch. The embodiment of the utility model provides an in, can be according to the operating frequency of this beam splitting module to through calculating the insertion loss that various photoswitches will produce after adding this beam splitting module, regard as power controller 12 with the photoswitch that selects more to be applicable to this beam splitting module. The power controller 12 may be disposed in each beam line divided by at least one stage of the beam splitter 11 (for example, any stage of the beam splitter 11 in the beam splitting module, or any multi-stage beam splitter 11), so as to control on/off of light in each beam line divided by the at least one stage of the beam splitter 11.
For example, referring to fig. 2 (the left side of the beam splitting module is shown as the light incident side in fig. 2), only two light beam lines divided by the first-stage beam splitter 11 (the beam splitter 11 shown in fig. 2) may be respectively provided with one power controller 12, that is, the first-stage beam splitter 11 corresponds to two first-stage power controllers 12 (the first-stage power controllers 12 are shown as 1 to 12 in fig. 2), and the two first-stage power controllers 12 may respectively control the on/off of light in the light beam line, such as controlling whether the two light beam lines transmitted by the first-stage beam splitter 11 can enter the next-stage beam splitter 11 (the second-stage beam splitter 11 shown as 2 to 11 in fig. 2). Alternatively, as shown in fig. 1, one power controller 12 may be respectively disposed in the beam lines divided by the beam splitter 11 of each stage, so that whether the corresponding beam line is turned on or not is determined by each power controller 12.
Because the embodiment of the utility model provides a can set up corresponding power controller 12 according to the actual demand in the light beam line that every grade beam splitter 11 was divided for can cut off or communicate the route of light beam line transmission through the control of power controller 12 of difference, and then can control the beam splitting result of initial beam, realize the rational distribution to initial beam power, make the laser radar emitter that adopts this beam splitting module more be applicable to the detection of further distance.
Optionally, referring to fig. 3, a power controller 12 is disposed in each beam line divided by the last-stage beam splitter 11, where the last-stage beam splitter 11 is the one-stage beam splitter 11 farthest from the light-incident side of the beam splitting module; the left side of the beam splitting module is shown as the light incident side in fig. 3.
As shown in fig. 3, the last stage of beam splitter 11 is the stage of beam splitter 11 farthest from the light incident side of the beam splitting module, that is, the rightmost stage of beam splitter 11 shown by the icons 3-11 in fig. 3. The embodiment of the utility model provides a can only set up power controller 12 in many beam circuit that 11 beam splitters of this last level divide one-to-one for every beam circuit that 11 beam splitters of this last level sent all corresponds a power controller 12, and then can realize freely switching the intercommunication of every beam circuit that this beam splitting module finally sent or the purpose that cuts off. The beam splitting module needs fewer power controllers 12, and the whole structure is simpler; and, it is possible to realize control of whether each of the target light beams is emitted or not.
Alternatively, in the case where the power controller 12 is provided in each of the beam lines divided by the multi-stage beam splitter 11, the power controllers 12 of the stages other than the power controller 12 of the current stage are set to the on state; the power controller 12 at the current stage is the corresponding power controller in the stage that needs to be controlled currently.
In the embodiment of the present invention, the beam splitting module is a beam splitting module which is respectively provided with a power controller 12 in the beam path divided by the multi-stage beam splitter 11, if the current need to control the on-off of a certain beam path divided by the beam splitter 11 of a certain stage, the stage corresponding to the beam path which needs to be controlled to be conducted or not can be used as the current stage, and the power controller 12 provided in the current stage is used as the power controller 12 of the current stage; the power controllers 12 of other stages represent power controllers of stages other than the current stage with respect to the power controller 12 of the current stage. In this case, the other power controllers 12 can be kept in an on state all the time, that is, the optical beam lines in which the other power controllers 12 are located can be kept in an on state all the time, so that a larger number of optical beam lines can be switched on or off by controlling a smaller number of power controllers 12 (e.g., the current power controller 12).
For example, as shown in fig. 1, in the case where the beam splitting module is a beam splitting module in which the power controllers 12 are correspondingly provided in the beam paths divided by the beam splitter 11 of each stage, if it is necessary to control the two beam paths divided by the beam splitter 11 of the second stage, if it is necessary to control the power controllers 12 in the two beam paths divided by the beam splitter 11 of the second stage located at the upper position in fig. 1, the second stage may be set as the current stage, and the first stage and the third stage other than the second stage may be set as the other stages; the other power controllers 12 (for example, two power controllers 12 corresponding to the first-stage beam splitter 11 and 8 power controllers 12 corresponding to the third-stage beam splitter 11) except the four power controllers 12 corresponding to the second-stage beam splitter 11 in fig. 1 are kept on by default, so that the beam lines connected to the beam lines divided by the current-stage beam splitter are always kept on; at this time, the on/off of the beam line divided by the beam splitter 11 of the corresponding last stage (e.g., the third-stage beam splitter 11 shown as 3-11 in fig. 1) can be directly controlled by only controlling one or more power controllers 12 corresponding to the beam splitter 11 of the current stage. The beam splitting module flexibly and effectively utilizes the characteristic of multi-stage distribution of the beam splitter 11, and has the advantage of simple operation in some practical control links.
Optionally, the beam splitter 11 comprises a multimode interferometer. The embodiment of the utility model provides an in, use multimode interferometer as beam splitter 11 can ensure that a beam line is after this beam splitter 11, its power can be divided many beam lines on average, and it has advantages such as insertion loss is little, compact structure, manufacturing tolerance nature is good, simple process and to polarization insensitivity simultaneously.
The embodiment of the utility model provides a still provide a laser radar emitter, it is shown with reference to fig. 4, include: any one of the beam splitting module 1, the phased array emission module 2 and the light source 3; the transmission direction of light is indicated in fig. 4 as the transmission direction from left to right.
As shown in fig. 4, the light source 3 is disposed on the light incident side of the beam splitting module 1, and is configured to emit an initial light beam to the beam splitting module 1; the beam splitting module 1 is used for dividing the initial light beam into a plurality of target light beams; phased array emission module 2 sets up in beam splitting module 1's light-emitting side, including a plurality of phased array emission unit 21, a plurality of phased array emission unit 21 and many target beam one-to-ones, phased array emission unit 21 is used for converting the target beam who corresponds to the form that contains at least one light spot to throw to the target area. As shown in fig. 4, 1 initial beam is finally divided into 8 target beams.
The embodiment of the utility model provides an among the laser radar emitter that provides, as shown in fig. 4, light source 3 sets up in the leftmost side of the laser radar emitter that fig. 4 shows for to the beam splitting module 1 transmission initial beam that corresponds the setting with it, and the initial beam that this light source 3 launched can be a laser. Alternatively, the light source 3 is a vertical cavity laser, wherein the vertical cavity laser is a semiconductor laser emitting laser light perpendicular to the top surface of the integrated circuit, and the use of the vertical cavity laser as the light source 3 has many advantages over the conventional use of an edge emitting laser as the light source. For example, when adopting this vertical cavity laser as light source 3, the integration of high density array can be realized easily to the perpendicular substrate of light-emitting direction, can realize higher power output, makes the utility model discloses the light-emitting effect of the light source 3 that uses is better.
In the laser radar transmitting device, after the light source 3 transmits an initial light beam to the beam splitting module 1, the beam splitting module 1 can divide the initial light beam step by step through the beam splitter, and a plurality of light beam lines, namely a plurality of target light beams, which are finally used for emitting the beam splitting module 1 are obtained by dividing at the position of the beam splitter at the last stage. The beam splitting module 1 can inject a plurality of target beams into the phased array emitting module 2 disposed opposite to the beam splitting module 1, and the phased array emitting module 2 is disposed on the right side of the beam splitting module 1 as shown in fig. 4. In the embodiment of the present invention, the phased array transmitting module 2 includes a plurality of phased array transmitting units 21, and each phased array transmitting unit 21 corresponds to each target beam, and after the target beam is incident on the phased array transmitting unit 21 opposite to the target beam, the target beam can be converted into a plurality of forms to be projected to a target area, wherein the target area can be an area to be scanned; also, among the plurality of forms that can be obtained after the object beam is converted by the phased array emission unit 21, the object beam is converted into a form including at least one light spot, and for example, after the object beam passes through the corresponding phased array emission unit 21, it may be converted into a light spot by the phased array emission unit 21 to be directed to a target area, so that the scanning laser projected on the target area in the far field is a laser light spot.
The embodiment of the utility model provides an in, can be through setting for the beam splitting result of beam splitting module 1 among this laser radar transmission module to control the power distribution of initial light beam, with light intensity, the scanning range etc. that change the scanning laser of final directive target area. For example, referring to fig. 4, by controlling the on/off of the power controller in the beam splitting module 1 that can finally divide an original beam into eight target beams, the power of each target beam can be flexibly changed from 1/8 times of the original beam power to the power of the scanning laser that is more suitable for the requirement, for example, by controlling the power controller in the beam splitting module 1, so that the beam splitting module 1 only emits one target beam, and after the target beam enters the corresponding phased array emission unit 21 in the phased array emission module 2, the target beam can be projected and scanned in the form of a laser spot on the target area, so that all the energy is concentrated at one point, and the power of the laser spot is almost equal to the power of the original beam (e.g. the power of the point is greater than 92% of the power of the original beam), the light intensity of the laser spot is greatly improved, the laser spot has the capability of long-distance detection, and the laser spot can be suitable for scanning a target area at a long distance, and a schematic diagram corresponding to the situation can be seen in fig. 6.
Alternatively, referring to fig. 5, the phased array transmission unit 21 includes a phase shifter 211 and a transmitter 212; the phase shifter 211 is arranged between the beam splitting module 1 and the emitter 212, the phase shifter 211 is used for controlling the phase difference of the corresponding target beams, and the emitter 212 is used for converting the modulated target beams into a form containing at least one light spot and projecting the light spot to a target area; fig. 5 shows the right side of the beam splitting module 1 as the light exit side.
In the embodiment of the present invention, the phase shifter 211 and the transmitter 212 included in the phased array transmitting unit 21 are both disposed on the light-emitting side of the beam splitting module 1, as shown in fig. 5, and are sequentially the beam splitting module 1, the phase shifter 211 and the transmitter 212 from left to right. After the beam splitting module 1 injects the target light beam into the corresponding phased array emission unit 21, the target light beam may first pass through the phase shifter 211, the phase difference of the target light beam is modulated by the phase shifter 211, and then the modulated target light beam is transmitted to the transmitter 212 in the phased array emission unit 21, and finally the modulated target light beam is projected to the target area by the transmitter 212 in a form including at least one light spot. Optionally, the form of the at least one spot may include: in the form of a row of light spots, in the form of a column of light spots or in the form of a lattice.
Wherein each phased array transmitting unit 21 can be set to direct the target beam to the target area in some form according to the actual scanning requirements, and illuminating different lines can achieve different angle scanning, thereby covering the whole target area. For example, in the case that each phased array transmitting unit 21 can respectively project each target light beam to the target area in the form of a row of light spots or a column of light spots, by adjusting and controlling the beam splitting result of the beam splitting module 1, a row or a column of laser light spots with a larger required light intensity can be projected on the target area, wherein the result of the laser radar transmitting module in the case of controlling to transmit only one target light beam can be shown in fig. 7; and under the condition that each phased array emission unit 21 can respectively project each target light beam to the target area in the form of a dot matrix, by regulating and controlling the beam splitting result of the beam splitting module 1, for example, all the target light beams are controlled to be completely emitted, a point cloud generated by overlapping arrays of a plurality of laser light spots with uniform light intensity and large scanning range can be projected on the target area, and a schematic diagram corresponding to the laser radar emission module under the condition can be shown in fig. 8.
Optionally, the transmitter 212 includes at least one of a grating coupler, a non-uniform waveguide grating, a dammann grating, a super surface.
The transmitter 212 may be implemented by using the above devices alone to achieve the function of projecting the target beam to the target area in some form, or by combining the above devices, and a plurality of the devices cooperate to achieve the function. For example, the transmitter 212 provided in the embodiment of the present invention may be a grating coupler, if the laser radar transmitting module is an 8-line transmitting device, such as a device capable of dividing an initial beam into 8 pieces of marked beams, a target beam emitted from one transmitter 212 may be a row (or one) of light spots in the transverse direction of a target area, and if the 8 pieces of marked beams are projected to the target area through the corresponding transmitter 212 at the same time, 8 × 8 point clouds (or 8 light spots) may be formed in the target area; or, the transmitter 212 provided by the embodiment of the present invention may also be a device formed by combining a dammann grating and a non-uniform waveguide grating, and when the laser radar transmitting module is an 8-line transmitting device, the target light beam may project a plurality of light spot arrays through the transmitter 212 in the target area, for example, a point cloud is generated in the target area. The lidar transmission module with transmitter 212 may be set according to actual scanning requirements so that the scanning scheme that may be performed is more diversified.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the technical solutions of the changes or replacements within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A beam splitting module, comprising: a plurality of beam splitters (11) and a plurality of power controllers (12); the beam splitter (11) is used for dividing a light beam line emitted into the beam splitter (11) into a plurality of light beam lines; the beam splitters (11) are distributed in a multi-stage mode, and the light paths of the beam splitters (11) are in a multi-branch tree structure;
each light beam line divided by the beam splitter (11) of at least one stage is provided with the power controller (12); the power controller (12) is used for controlling the on-off of the light of the located light beam circuit.
2. The beam splitting module of claim 1, wherein the power controller (12) is disposed in each beam line divided by the beam splitter (11) of the last stage, and the beam splitter (11) of the last stage is the one stage beam splitter (11) farthest from the light incident side of the beam splitting module.
3. The beam splitting module according to claim 1, wherein in a case where the power controller (12) is provided in each of the beam lines divided by the beam splitters (11) of the plurality of stages, the power controllers (12) of the stages other than the power controller (12) of the current stage are set to an on state;
and the power controller (12) of the current stage is a corresponding power controller in the stage needing to be controlled currently.
4. The splitter module of any of claims 1-3, wherein the power controller (12) comprises a semiconductor optical amplifier type optical switch, an electro-optical effect Mach-Zehnder interference type optical switch, a thermo-optical effect Mach-Zehnder interference type optical switch, a micro-ring type optical switch, or a micro-electromechanical system optical switch.
5. The beam splitting module according to any of claims 1-3, wherein the beam splitter (11) comprises a multimode interferometer.
6. A lidar transmitting apparatus, comprising: the splitting module (1) according to any of claims 1 to 5, the phased array transmit module (2) and the light source (3);
the light source (3) is arranged on the light incidence side of the beam splitting module (1) and used for emitting an initial light beam to the beam splitting module (1);
the beam splitting module (1) is used for dividing the initial light beam into a plurality of target light beams;
phased array emission module (2) set up the light-emitting side of beam splitting module (1), including a plurality of phased array emission unit (21), a plurality of phased array emission unit (21) with many target beam one-to-ones, phased array emission unit (21) are used for converting the target beam who corresponds into the form that contains at least one light spot to throw to the target area.
7. Lidar transmission device according to claim 6, characterized in that the phased array transmission unit (21) comprises a phase shifter (211) and a transmitter (212);
the phase shifter (211) is arranged between the beam splitting module (1) and the emitter (212), the phase shifter (211) is used for controlling the phase difference of the corresponding target beams, and the emitter (212) is used for converting the modulated target beams into a form containing at least one light spot and projecting the light spot to a target area.
8. The lidar transmission apparatus of claim 7, wherein the transmitter (212) comprises at least one of a grating coupler, a non-uniform waveguide grating, a dammann grating, a super surface.
9. Lidar transmission device according to claim 6, wherein the form of the at least one light spot comprises: in the form of a row of light spots, in the form of a column of light spots or in the form of a lattice.
10. Lidar transmission device according to claim 6, wherein said light source (3) is a vertical cavity laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221095978.7U CN217467176U (en) | 2022-05-09 | 2022-05-09 | Beam splitting module and laser radar transmitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221095978.7U CN217467176U (en) | 2022-05-09 | 2022-05-09 | Beam splitting module and laser radar transmitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217467176U true CN217467176U (en) | 2022-09-20 |
Family
ID=83273724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221095978.7U Active CN217467176U (en) | 2022-05-09 | 2022-05-09 | Beam splitting module and laser radar transmitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217467176U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
-
2022
- 2022-05-09 CN CN202221095978.7U patent/CN217467176U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217467176U (en) | Beam splitting module and laser radar transmitting device | |
| US8326154B2 (en) | Multiwavelength transmitter | |
| CN108828712B (en) | Large-scale integrated optical switch chip based on optical phased array | |
| CN110955042B (en) | Symmetrical light beam scanning system and working method thereof | |
| CN104065418A (en) | Integrated orbital angular momentum mode transmitter | |
| CN113805641B (en) | Photonic neural network | |
| CN213212655U (en) | Multi-wavelength semiconductor laser system | |
| CN105470808A (en) | Tunable laser system with multi-optical-path output | |
| CN114157391A (en) | Beam forming device and beam forming method thereof | |
| CN211880393U (en) | Planar sparse light-controlled phased array transmitting antenna system with low array element number | |
| CN104503039B (en) | A kind of few mould optical communication transmission device chip of straight mode InP-base single-chip integration | |
| AU2009275308B9 (en) | Multi-function array antenna | |
| CN211978137U (en) | Coherent array light beam phase error detection device and coherent synthesis phase-locked system | |
| CN115685136A (en) | Optical phased array chip and phased array laser radar | |
| EP2148456A1 (en) | Multi-funcition array antenna | |
| CN111510186A (en) | Aperiodic planar sparse light-controlled phased array transmitting antenna system | |
| Zhang et al. | Photonic integrated multicast switch-based optical wireless data center network | |
| CN112748440A (en) | Photon time broadening laser radar system based on microcavity optical comb | |
| Zhang et al. | System performance assessment of an optical wireless data center network based on photonic integrated multicast switch | |
| CN114217293A (en) | Light-operated multi-beam forming network chip and network | |
| Guo et al. | Monolithic 6× 6 transmitter-router with simultaneous sub-nanosecond port and wavelength switching | |
| CN118151462A (en) | Optical phased array structure and phased array laser radar | |
| WO2024045550A1 (en) | Laser radar transmitting module, transceiver device and laser radar | |
| JPH1066112A (en) | Optical matrix switch | |
| JP2004213024A (en) | Semiconductor-based optical switch architecture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |