1.5-micron passive Q-switched laser

Abstract

The invention discloses a 1.5-micron passive Q-switched laser. The 1.5-micron passive Q-switched laser comprises a plurality of pumping sources with the same working period and working duty ratio, anda resonant cavity arranged on the light emitting sides of the plurality of pumping sources; the plurality of pumping sources are used for sequentially emitting pumping light at fixed time intervals in one working period; the pulse width of the pumping source is equal to the fixed time interval; and the resonant cavity is used for pumping the laser crystals in the resonant cavity by utilizing theplurality of pump light to obtain a plurality of beams of 1.5-micron laser emitted from different positions of the laser crystals, and each beam of laser is emitted after being reflected for multipletimes in the resonant cavity to obtain continuous pulse laser. According to the 1.5-micron passive Q-switched laser, the defect that laser pulses output by a traditional 1.5-micron passive Q-switchedlaser under the conditions of high peak power and chopping pumping are discontinuous is overcome. The laser pulse output by the laser can be continuous in the time domain under the chopping pumping working condition, and the application range of the 1.5-micron passive Q-switched laser can be effectively expanded.

Description

technical field [0001] The application relates to a 1.5-micron passive Q-switched laser, belonging to the technical field of lasers. Background technique [0002] 1.5 micron is located in the human eye safe band, has good transmission to the atmospheric window, and is widely used in the fields of long-distance remote sensing, communication and laser medical treatment. For some special fields, such as automotive lidar, the laser light source used has high repetition rate, narrow laser pulse and high peak power requirements. 1.5 micron passive Q-switched laser is a method commonly used to achieve high repetition frequency, narrow pulse width, and high peak power laser pulse output. It has the advantages of compact structure, small size, high safety, and is suitable for various testing environments. [0003] The passive Q-switched laser in the prior art pumps the laser crystal in the working mode of continuous pumping or chopping pumping, and the laser pulse sequence generated...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a 1.5-micron passive Q-switched laser to solve the technical problem that existing 1.5-micron passive Q-switched lasers use chopping to pump the crystal, resulting in discontinuous output laser pulses

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