Pulse pumping passive Q-switched laser with light delay controllable function

Abstract

The invention discloses a pulse pumping passive Q-switched laser with a light delay controllable function. Photoelectric monitoring and feedback functions are added in passive Q-switched laser of pulse pumping, light delay is monitored in real time through a photoelectric detector, a test value is compared with a preset value through a feedback device, and pumping power is fed back and adjusted atthe same time, so that the light delay of a laser is stabilized near the preset value. According to the scheme of the invention, the optical delay of the pulse-pumped passive Q-switched laser can beeffectively controlled, the delay stability of the passive Q-switched laser is improved, the optical pulse can be synchronized with external equipment or devices and the like, and the application of the passive Q-switched laser in the fields of laser radars, spectrum instruments, photoelectric detection and the like is expanded.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a pulse-pumped passive Q-switched laser with a controllable optical delay function. Background technique [0002] Q-switching technology is the main technology to obtain giant pulse laser, Q-switching technology has two kinds of active Q-switching and passive Q-switching. Compared with active Q-switching technology, passive Q-switching technology has the characteristics of compact structure, high energy conversion efficiency, and low price, and has broad application prospects in military and civilian fields such as long-distance measurement, remote sensing detection, medical health, and space communication. And has occupied an increasingly important position. [0003] Cr 4+ :YAG saturable absorption Q-switching is the most widely used type of passive Q-switching. When Cr 4+ : When the incident light signal of YAG crystal in its absorption band is weak, it will show a very obvi...

AI Technical Summary

Problems solved by technology

Especially in the passively Q-switched laser with continuous pumping, if the pump power is not actively controlled, there will always be instability in the timing and repetition frequency of pulse generation. The pulse cannot be synchronized with other instruments or detection equipment, which greatly limits the application range of passive Q-switched lasers

This method of controlling the laser pulse through pulse pumping makes the repetition frequency of the optical pulse the same as the repetition frequency of the pulse pumping electrical signal, which improves the stability of the repetition frequency of the optical pulse to a certain extent, but the ambient temperature and pulse generation conditions The fluctuation of the pulse pumping passive Q-switching method still has great uncertainty compared with the pulse pumping electrical signal, that is, the fluctuation range of the optical delay is relatively large, which largely limits the Application range of passively Q-switched lasers

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