Laser emission module for lidar

A technology of laser emission and laser radar, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of laser emission module system complexity, high cost, and difficulty in integration, and achieve uniform beam, narrow spectral width, and convenience integrated effect
CN110265871AInactive Publication Date: 2019-09-20深圳市柠檬光子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市柠檬光子科技有限公司
Publication Date
2019-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a laser emission module for lidar, which is characterized in that a semiconductor laser chip in the module is a horizontal cavity surface emitting laser (HCSEL) chip, and the laser light emitting by the HCSEL chip is collimated in at least one direction, so that the optical system is simplified; the laser emission module is enabled to have the characteristics of small central wavelength range, narrow spectral width, small wavelength temperature drift and the like without adding any optical devices through grating mode locking, and the HCSEL can simultaneously have a large light emitting area and a high-quality beam, thereby achieving the laser characteristics of high power, high brightness and uniform beam, and being very suitable for the application of long-distance and high-precision lidar. In addition, the power density of the light emitting surface is reduced due to the large light emitting area, and the life of the device is correspondingly prolonged. The laser chip structure and light emitting mode of the HCSEL can also reduce the chip cost and facilitate the integration with other optical devices in the module.
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Description

technical field

[0001] The invention relates to the technical field of laser devices, in particular to a laser emitting module for laser radar. Background technique

[0002] Laser radar (LiDAR) mainly emits laser pulses by using semiconductor lasers in the near-infrared band, and then compares the received signal (target echo) reflected from the target with the transmitted signal, and obtains the target's signal after appropriate processing. Relevant information, such as target distance, azimuth, height, speed, attitude, and even shape parameters, so as to detect, track and identify objects such as cars, aircraft, missiles and other targets. It consists of a laser transmitter, an optical receiver, a turntable (for scanning radar) and an information processing system. The laser converts electrical pulses into optical pulses and sends them out, and the optical receiver restores the optical pulses reflected from the target into Electric pulses are sent to the display. [0003...

Claims

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