High-power light source

Abstract

The invention relates to the technical field of photoelectric devices, in particular to a high-power light source. The high-power light source comprises a seed light source used for outputting an optical signal; the light splitting module is used for splitting the light signal into multiple beams of light signals; the plurality of injection locking lasers have the same wavelength as that of the seed light source and are used for receiving the multiple beams of light signals output by the light splitting module for injection locking and outputting the multiple beams of light signals; and the plurality of transmitting antennas are used for outputting the plurality of beams of optical signals output by the plurality of injection-locked lasers to a space for interference. According to the invention, a seed light source and a plurality of injection locking lasers are adopted, an optical signal output by the seed light source is used as an injection optical signal to be input into the plurality of injection locking lasers, and the plurality of injection locking lasers lock the phase of the optical signal. Therefore, the light beams output to the space form a high-power and high-quality light spot after interference. Therefore, the high-power light source is formed by the seed light source, the injection locking lasers and other structures.

Description

Technical Field

[0001] The invention relates to the technical field of optoelectronic devices, and in particular to a high-power light source. Background Art

[0002] Automotive LiDAR is constantly developing towards long detection distance and low cost. To increase the detection distance, firstly, ultra-high power laser light source is needed, and secondly, the light spot quality emitted by the light source should be high. To reduce the cost, chip integration should be used as much as possible.

[0003] However, the laser light source in the prior art has the following defects:

[0004] 1. The fiber laser has good spot quality and high output power, but it cannot be integrated on chip, is large in size and has high cost.

[0005] 2. Surface-emitting semiconductor lasers have high power and can be integrated on-chip, but they are multi-mode outputs and have poor spot quality. It is difficult to improve the spot quality through optical methods, which results in the divergence angle and spot area of ​​the beam not being able to reach an ideal state at the same time. Too large a divergence angle will lead to reduced laser radar resolution and detection distance. To reduce the divergence angle, the spot area needs to become very large, which increases the volume of the entire optical path, affecting both cost and performance.

[0006] 3. Edge-emitting semiconductor lasers can be integrated on-chip, with single-mode output and high spot quality, but the output power is relatively low. Summary of the invention

[0007] In view of this, an embodiment of the present invention provides a high-power light source to solve the problem that it is difficult for light sources in the prior art to achieve high-power output.

[0008] The technical solution provided by the embodiment of the present invention is as follows:

[0009] A first aspect of an embodiment of the present invention provides a high-power light source, comprising: a seed light source for outputting an optical signal; a spectrometer for dividing the optical signal into multiple optical signals; multiple injection-locked lasers, whose wavelength is the same as that of the seed light source, for receiving the multiple optical signals output by the spectrometer for injection locking and outputting the multiple optical signals; and multiple transmitting antennas for outputting the multiple optical signals output by the multiple injection-locked lasers into space for interference.

[0010] In the present invention, by using a seed light source and multiple injection-locked lasers, the light signal output by the seed light source is input into the multiple injection-locked lasers as an injection light signal, and the multiple injection-locked lasers lock the phase of the light signal, so that the light beam output into the space forms a high-power, high-quality light spot after interference. Thus, the present invention forms a high-power light source through structures such as a seed light source and multiple injection-locked lasers.

[0011] In an optional implementation, the relative phase difference between each transmitting antenna is zero and / or the spacing between adjacent transmitting antennas is less than half of the wavelength of the optical signal.

[0012] In the present invention, by setting the relative phase difference between each transmitting antenna to zero, the multiple beams of light output into space can achieve the maximum light intensity superposition through constructive interference, that is, the power of the interference light spot can reach the theoretical upper limit. At the same time, by making the spacing between adjacent transmitting antennas less than half the wavelength of the optical signal, it can be ensured that the light beams output by each laser form only one light spot after interference.

[0013] In an optional embodiment, the high-power light source further includes: a plurality of phase shifters, arranged after the light splitting module, for adjusting the phases of the multiple light beams. Alternatively, a plurality of phase shifters, arranged between the injection-locked laser and the transmitting antenna, for adjusting the phase of the light signal output by each injection-locked laser.

[0014] In the present invention, by arranging a phase shifter in a high-power light source, the phase of the optical signal can be adjusted. Thus, when there is a large manufacturing process error and the relative phase difference cannot be made zero, the relative phase difference can be controlled by adjusting the phase of the phase shifter.

[0015] In an optional implementation manner, the full angle of divergence of each transmitting antenna satisfies the following formula:

[0016] θ<2*asin(2*π*λ / d)

[0017] Where θ represents the full angle of divergence of the transmitting antenna, λ represents the wavelength of the optical signal, and d represents the distance between the transmitting antennas.

[0018] In the present invention, when the spacing between the transmitting antennas cannot be less than half the wavelength of the optical signal, the full angle of divergence of the transmitting antenna is controlled to make its full angle of divergence smaller, so that there is only one light spot within the antenna divergence angle range, which can avoid the problem of light spot power dispersion.

[0019] In an optional embodiment, the spectroscopic module includes: a collimating lens for collimating the optical signal output by the seed light source to obtain a collimated light beam; and a cylindrical lens for diffusing the collimated light beam, wherein the diffused light beam covers the laser injection ports of multiple injection-locked lasers.

[0020] In an optional implementation, the distance between the cylindrical lens and the injection locking laser is greater than a preset threshold, and the preset threshold is a preset multiple of the distribution width of laser injection ports of the plurality of injection locking lasers.

[0021] In an optional embodiment, the high-power light source also includes a substrate and a housing, the seed light source is arranged on the substrate using a seed light source chip, a plurality of injection-locked lasers constitute an injection-locked laser array chip arranged on the substrate, the output port of the injection-locked laser array chip serves as a transmitting antenna, the collimating lens and the cylindrical lens are mounted on the substrate, the substrate and the seed light source chip, collimating lens, cylindrical lens and injection-locked laser on the substrate are arranged in the housing, and the housing also includes a light window, which is used to output multiple light signals with the same wavelength as the light signal output by the seed light source into space.

[0022] In the present invention, the seed light source, the light splitting module and the injection locking laser are integrated on the same substrate and placed in a housing, thereby achieving protection and integration of the high-power light source.

[0023] In an optional implementation, the optical splitting module includes: a beam splitter, and the beam splitter and a plurality of injection-locked lasers are connected by waveguides.

[0024] In an optional implementation, the seed light source, the cascade module, and multiple injection-locked lasers are integrated on the same chip, and the output waveguides of the multiple input-locked lasers serve as transmitting antennas.

[0025] In the present invention, by integrating the seed module, the light splitting module and the injection locking laser into the same chip, not only the integration level is further improved, but also the cost can be further reduced.

[0026] In an optional implementation, the intervals between adjacent transmitting antennas are the same, and a plurality of transmitting antennas form a linear array or a planar array.

[0027] In the present invention, the gain is improved by forming a linear array or a planar array with a plurality of transmitting antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a structural block diagram of a high-power light source in an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a power supply structure of a mover in an embodiment of the present invention;

[0031] Figure 3 It is a structural block diagram of a high-power light source in another embodiment of the present invention;

[0032] Figure 4 FIG. 4 is a structural block diagram of a high-power light source in another embodiment of the present invention. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] The embodiment of the present invention provides a high power light source, such as Figure 1 As shown, the light source includes: a seed light source for outputting an optical signal; a spectrometer module for dividing the optical signal into multiple optical signals; multiple injection-locked lasers, whose wavelength is the same as that of the seed light source, for receiving the multiple optical signals output by the spectrometer module for injection locking and outputting the multiple optical signals; and multiple transmitting antennas for outputting the multiple optical signals output by the multiple injection-locked lasers into space to generate interference.

[0038] Specifically, the seed light source serves as the starting light source of the high-power light source, and it can generate an optical signal with high frequency stability, narrow line width and good coherence. In practical applications, semiconductor lasers or fiber lasers can be used as seed light sources. For example, a distributed feedback semiconductor laser (DFB) can be used as a seed light source. The optical splitting module can be implemented using a structure that can achieve optical splitting in the relevant technology, such as a beam splitter, a lens and other structures. The transmitting antenna is mainly used to transmit the optical signal output by the injection-locked laser into space.

[0039] An injection-locked laser is a laser that injects an external optical signal into the laser's resonant cavity so that the laser's output frequency, phase, power and other characteristics are controlled by the injected optical signal. In addition, when the wavelength of the injected optical signal is the same as the wavelength of the injection-locked laser, the injection-locking function of the injection-locked laser can be achieved. That is, when the wavelength of the seed light source matches the inherent wavelength of the injection-locked laser (within the gain bandwidth of the gain medium), the seed light can induce stimulated radiation in the cavity, so that the laser's output is locked to the wavelength of the seed light source.

[0040] Injection-locked lasers can be fiber lasers, semiconductor lasers, etc. Among them, when a semiconductor injection-locked laser is used, the injected light (in this embodiment, the injected light is the split light signal output by the seed light source) will change the gain and refractive index of the active region, thereby affecting the output frequency and phase of the laser. If the intensity of the injected light is strong enough, the output of the laser will be forced to synchronize with the injected light, so that the frequency and phase of the output light are locked to the frequency and phase of the injected light signal. As a result, the phase of the light signal output by multiple injection-locked lasers is theoretically the same as the phase of the seed light source, that is, the phase difference between the light signals is zero, so that constructive interference will occur between the light signals emitted into space, so that the light intensity superposition reaches the maximum value. That is, the theoretical upper limit of the power of the light spot formed after interference is the sum of the output powers of multiple injection-locked lasers. For example, the output power of each injection-locked laser is 1 watt, and 100 injection-locked lasers are used, and a 100-watt interference light spot can be obtained in theory.

[0041] The function of the optical phased array is realized based on the seed light source, the spectroscopic module, and the injection-locked laser in the high-power light source. That is, the light from multiple antennas is concentrated in one direction to form a Gaussian-shaped light spot, which is similar in shape to the Gaussian light spot and has high light spot quality. When the optical phased array is working, it can lock the phases of multiple light sources and transmit them into space through a group of phased array antennas. After interference, the light from all light sources will be concentrated on one light spot, forming a high-power light source with high light spot quality.

[0042] In this embodiment, by using a seed light source and multiple injection-locked lasers, the light signal output by the seed light source is input into the multiple injection-locked lasers as an injection light signal, and the multiple injection-locked lasers lock the phase of the light signal, so that the light beam output into the space forms a high-power, high-quality light spot after interference. Therefore, in this embodiment, a high-power light source is formed by structures such as a seed light source and multiple injection-locked lasers.

[0043] In an optional embodiment, the relative phase difference between each transmitting antenna is zero and / or the spacing between adjacent transmitting antennas is less than half the wavelength of the optical signal. Specifically, when the relative phase difference between each transmitting antenna is strictly zero, the multiple beams of light output into space can achieve a maximum light intensity superposition through constructive interference, that is, the power of the interference spot can reach the theoretical upper limit. If the relative phase difference between each transmitting antenna is not zero, the interference effect decreases, and although the power of the interference spot will be greater than the optical power output by a single injection-locked laser, it may not reach the theoretical upper limit.

[0044] In addition, by making the distance between adjacent transmitting antennas less than half the wavelength of the optical signal, it can be ensured that the light beams output by each laser form only one light spot after interference.

[0045] Among them, in order to ensure that the relative phase difference between each transmitting antenna is zero, the manufacturing process of the high-power light source can be monitored. That is, when processing and manufacturing the high-power light source, there is no manufacturing process error, or the manufacturing process error is small, which can ensure that the optical path from the seed light source to each transmitting antenna is the same, then the frequency and phase of the injection-locked laser are locked by the same seed light source and will not change. At this time, the requirement that the relative phase difference between each transmitting antenna is zero can be met. In addition, the distance between the seed light source and the transmitting antenna can be shortened during the manufacturing process, which is also conducive to reducing the phase error.

[0046] However, when the manufacturing process error is large, a phase shifter can be set on the connecting optical path between each injection-locked laser and the transmitting antenna, and the phase of each light can be adjusted by the phase shifter so that the relative phase difference between each transmitting antenna is zero. Specifically, the phase shifter can be set after the optical splitter module to adjust the phase of the multiple light beams output by the optical splitter module. The phase shifter can also be set between the injection-locked laser and the transmitting antenna to adjust the phase of the multiple light beams output by the injection-locked laser.

[0047] The phase adjustment process of the phase shifter can be implemented according to the following process: monitor the power value of the light beam formed after interference, adjust one of the phase shifters, fix the phase shift of the phase shifter at the value with the highest power value of the light beam, keep the phase shift of the phase shifter unchanged, select another phase shifter to perform the same operation until all phase shifters have completed the operation, and then measure the power value of the light beam to determine whether the power reaches the theoretical maximum value. If not, continue to perform the above operations until the power value of the light beam reaches the theoretical maximum value.

[0048] In addition, to reduce control complexity, multiple phase shifters can be powered by the same power supply, such as Figure 2 As shown, a variable resistor is connected in series to each phase shifter, and the phase shift of the phase shifter is controlled by adjusting the resistance value of the variable resistor. The negative poles of all phase shifters are connected together and connected to the negative pole of the DC power supply. The positive pole of each phase shifter is connected to one end of the variable resistor, and the other end of the variable resistor is connected to the positive pole of the DC power supply. The adjustment range of the variable resistor is determined according to the resistance R of the phase shifter. The lower limit of the adjustment range of the variable resistor should be less than R / 5, and the upper limit should be greater than R*5. The voltage of the DC power supply is determined according to the half-wave voltage U of the phase shifter, and should be greater than U*2. The resistance and half-wave voltage of the phase shifter can be determined after the design.

[0049] With the development of photonic integration technology, the distance between transmitting antennas can be several microns, but the wavelength of light used by LiDAR is usually less than 2um, and it is difficult to ensure that the distance between transmitting antennas is less than half the wavelength. When the distance between adjacent transmitting antennas cannot be guaranteed to be less than half a wavelength, the interference spot will be split into multiple ones, and the power of a single spot will decrease. At this time, the divergence angle of each transmitting antenna can be reduced so that there is only one spot within the antenna divergence angle range, which can avoid the problem of spot power dispersion. Specifically, when the distance between adjacent transmitting antennas is less than half a wavelength, the full angle of the divergence angle of each transmitting antenna satisfies the following formula:

[0050] θ<2*asin(2*π*λ / d)

[0051] Where θ represents the full angle of divergence of the transmitting antenna, λ represents the wavelength of the optical signal, and d represents the distance between the transmitting antennas.

[0052] In addition, the transmitting antennas can be arranged in a linear array or a planar array, with the spacing between adjacent antennas being consistent. The advantage of a linear array is that the transmission efficiency is high, but the light spot formed is elliptical, and a cylindrical lens is required to change the light spot into a circular shape; a planar array can directly generate a circular light spot, but the transmission efficiency of a planar transmitting antenna is usually lower than that of an edge transmitting antenna.

[0053] In an optional embodiment, the optical splitting module includes a collimating lens and a cylindrical lens, the collimating lens is used to collimate the optical signal output by the seed light source to obtain a collimated light beam; the cylindrical lens is used to diffuse the collimated light beam, and the diffused light beam covers the laser injection ports of multiple injection-locked lasers. The high-power light source also includes a substrate and a housing, the seed light source uses a seed light source chip to be arranged on the substrate, a plurality of injection-locked lasers constitute an injection-locked laser array chip arranged on the substrate, the output port of the injection-locked laser array chip serves as a transmitting antenna, the collimating lens and the cylindrical lens are mounted on the substrate, the substrate and the seed light source chip, collimating lens, cylindrical lens and injection-locked laser on the substrate are arranged in the housing, and the housing also includes an optical window, the optical window is used to output multiple optical signals with the same wavelength as the output optical signal of the seed light source into space. The distance between the cylindrical lens and the injection-locked laser is greater than a preset threshold, and the preset threshold is a preset multiple of the distribution width of the laser injection ports of the multiple injection-locked lasers.

[0054] Specifically, the high-power light source structure is as follows Figure 3As shown, the seed light source adopts a DFB laser, which is an edge-emitting DFB laser chip, and multiple injection-locked lasers adopt an injection-locked laser array chip, for example, an edge-emitting injection-locked laser array chip can be used. The high-power light source works according to the following process: the light beam output by the seed light source is first collimated by a collimating lens to convert the divergent light beam into a collimated light beam, and then passes through a cylindrical lens to diffuse the light beam in one direction so that the diffused light beam can cover all laser injection ports of the injection-locked laser array chip, and after injection locking by the injection-locked laser array chip, it is output from the output port of the injection-locked laser array chip (as a transmitting antenna), and interferes in space, thereby obtaining a high-power light spot.

[0055] Among them, these two lenses are equivalent to the splitter module, which distributes the light of the DFB laser to all the injection-locked lasers. For the collimating lens, its parameters can be determined based on the divergence angle α of the output beam of the DFB laser chip and the chip thickness h, such as the focal length of the collimating lens is less than or equal to h / tan(α), and the radius of the collimating lens is less than or equal to h. For the cylindrical lens, it is a lens composed of a cylinder and a plane or two cylinders. The focal length of the cylindrical lens should be greater than the total width of the light inlet distribution of the injection-locked laser array chip; the height of the cylindrical lens should be greater than twice the height of the DFB laser chip. The collimating lens and the cylindrical lens only need to ensure that the optical axes are aligned, and the distance between the two can be set arbitrarily.

[0056] In addition, in order to ensure that the relative phase difference after the injection-locked laser array chip locks the light beam is as close to zero as possible, the distance between the cylindrical lens and the injection-locked laser array should be much larger than the width of the injection-locked laser array. For example, the distance can be set to 10 times the width of the injection-locked laser array input port distribution. The DFB laser chip, collimating lens, cylindrical lens and injection-locked laser array chip are all mounted on a substrate, which can be ceramic or silicon. There should also be metal wires on the substrate to supply power to the DFB laser and the injection-locked laser array through metal bonding wires. At the same time, an airtight shell is set outside the substrate to protect the DFB laser chip and the injection-locked laser array chip, etc. The shell has a light window with good light transmittance, and the width of the light window should be slightly wider than the injection-locked laser array to ensure that all light energy is emitted into space through the light window for interference.

[0057] In an optional implementation, in order to further improve integration and reduce costs, the seed light source, the light splitting module and multiple injection locked lasers are integrated on the same chip, and the output waveguides of the multiple input locked lasers are used as transmitting antennas. The light splitting module includes: a beam splitter, and the beam splitter and the multiple injection locked lasers are connected by waveguides. Specifically, Figure 1As shown, when there are N injection-locked lasers, the light splitting module can use a 1-to-N beam splitter, that is, the light splitting module splits the optical signal output by the seed light source into N beams and inputs them into the N injection-locked lasers. In other embodiments, a cascaded 1-to-2 beam splitter can also be used.

[0058] like Figure 4 As shown in the figure, when a cascaded 1-to-2 beam splitter is used, the high-power light source can work according to the following process: the light beam output by the DFB laser device is transmitted to the input end of the 1-to-2 beam splitter through its output waveguide, and then divided into two beams and then divided into four beams through the next level 1-to-2 beam splitter. By analogy, using M levels of cascaded 1-to-2 beam splitters, the light can be divided into 2^M beams, and finally each beam of light is transmitted to the input end of the injection-locked laser device through a waveguide. The output waveguide of the injection-locked laser directly acts as a transmitting antenna to emit light into space for interference. In addition, metal solder joints can be set on the chip, and the metal solder joints are connected to the DFB laser and all injection-locked lasers through metal wires.

[0059] In this embodiment, the seed light source, the light splitting module, the injection-locked laser and the transmitting antenna are formed on the same chip, thereby improving the integration of the high-power light source and reducing the cost. That is, the high-power light source has the advantages of high output power, good light spot quality, chip integration, small size and low cost.

[0060] Although the exemplary embodiments and their advantages have been described in detail, those skilled in the art may make various changes, substitutions and modifications to these embodiments without departing from the spirit of the present invention and the scope of protection defined by the appended claims, and such modifications and variations all fall within the scope defined by the appended claims. For other examples, those of ordinary skill in the art should readily understand that the order of the process steps may be changed while maintaining the scope of protection of the present invention.

[0061] In addition, the scope of application of the present invention is not limited to the processes, mechanisms, manufactures, material compositions, means, methods and steps of the specific embodiments described in the specification. From the disclosure of the present invention, it will be easily understood by those skilled in the art that the processes, mechanisms, manufactures, material compositions, means, methods or steps that currently exist or will be developed in the future, which perform substantially the same functions as the corresponding embodiments described in the present invention or obtain substantially the same results, can be applied according to the present invention. Therefore, the claims attached to the present invention are intended to include these processes, mechanisms, manufactures, material compositions, means, methods or steps within their scope of protection.

Claims

1. A high-power light source, characterized in that: The high-power light source comprises: A seed light source, used for outputting an optical signal; A light splitting module, used for splitting the optical signal into multiple optical signals; A plurality of injection-locked lasers, whose wavelength is the same as that of the seed light source, are used to receive the multiple light signals output by the optical splitting module, perform injection locking, and output the multiple light signals; Multiple transmitting antennas are used to output multiple optical signals output by multiple injection-locked lasers into space to cause interference.

2. The high power light source according to claim 1, characterized in that: The relative phase difference between the transmitting antennas is zero and / or the spacing between adjacent transmitting antennas is less than half of the wavelength of the optical signal.

3. The high power light source according to claim 1, characterized in that: The high-power light source also includes: A plurality of phase shifters are arranged after the light splitting module and are used to adjust the phases of the plurality of light beams; or, A plurality of phase shifters are arranged between the injection-locked laser and the transmitting antenna, and are used to adjust the phase of the optical signal output by each injection-locked laser.

4. The high power light source according to claim 1, characterized in that: The full angle of divergence of each transmitting antenna satisfies the following formula: θ<2*asin(2*π*λ / d) Where θ represents the full angle of divergence of the transmitting antenna, λ represents the wavelength of the optical signal, and d represents the distance between the transmitting antennas.

5. The high power light source according to claim 1, characterized in that: The optical splitting module comprises: A collimating lens, used for collimating the optical signal output by the seed light source to obtain a collimated light beam; The cylindrical lens is used to diffuse the collimated light beam, and the diffused light beam covers the laser injection ports of multiple injection-locked lasers.

6. The high power light source according to claim 5, characterized in that: The distance between the cylindrical lens and the injection locking laser is greater than a preset threshold value, and the preset threshold value is a preset multiple of the distribution width of the laser injection ports of the plurality of injection locking lasers.

7. The high power light source according to claim 5, characterized in that: The high-power light source also includes a substrate and a housing. The seed light source adopts a seed light source chip arranged on the substrate. A plurality of injection-locked lasers constitute an injection-locked laser array chip arranged on the substrate. The output port of the injection-locked laser array chip serves as a transmitting antenna. The collimating lens and the cylindrical lens are mounted on the substrate. The substrate and the seed light source chip, the collimating lens, the cylindrical lens and the injection-locked laser on the substrate are arranged in the housing. The housing also includes an optical window, which is used to output multiple optical signals with the same wavelength as the optical signal output by the seed light source into space.

8. The high power light source according to claim 1, characterized in that: The light splitting module comprises a beam splitter, and the beam splitter and a plurality of injection-locked lasers are connected by waveguides.

9. The high power light source according to claim 8, characterized in that: A seed light source, a cascade module and a plurality of injection-locked lasers are integrated on the same chip, and the output waveguides of the plurality of input-locked lasers serve as transmitting antennas.

10. The high power light source according to claim 1, characterized in that: The spacing between adjacent transmitting antennas is the same, and multiple transmitting antennas form a linear array or a planar array.

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