High peak narrow pulse laser based on laser gain burst

Abstract

The invention provides a high-peak narrow pulse laser based on sudden rise of a laser gain, which relates to the field of lasers and solves the problems of limited laser gain accumulation and low laser output efficiency of existing Q-switched lasers. The laser comprises two totally reflecting mirrors, a 1 / 4 wave plate, two laser gain media, two 90-degree polarized rotary electrooptical switches, two 45-degree polarizers, an output mirror and two pump sources. At the instant of mutation of the laser gain, the gain is a sum of the gains of the two laser gain media, at the this time, the laser loss is close to the gain of a first laser gain medium, and a difference of the laser gain and the loss is the gain of a second laser gain medium. The gain of the second laser gain medium can be adjusted to change the difference of the laser gain and the loss, in order to output high peak narrow pulse laser with higher energy. According to the high peak narrow pulse laser provided by the invention, a light path is switched quickly, the sudden rise of the gain is realized by the accumulation of the gains of the two laser gain media, the high peak narrow pulse laser with higher energy is output, and the overall laser output efficiency of the laser is further improved.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a high-peak narrow-pulse laser based on laser gain burst. Background technique [0002] Since the invention of lasers, narrow pulse lasers have achieved wide application prospects in military, scientific research, laser processing and other fields. At present, the following methods are mainly used to obtain narrow pulse laser: 1. Q-switching technology, which is characterized by adjusting the Q value of the laser resonator to make the laser crystal accumulate a sufficiently high gain, and then suddenly and rapidly increase the Q value of the laser resonator , so that the laser oscillation occurs rapidly in the cavity, and the energy of the inverted particles accumulated to a high degree will be concentrated and released quickly in a short time interval, so as to obtain the laser output with narrow pulse width and high peak power; 2. The cavity is empty Compared with the Q-switchi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of limited laser gain accumulation and low laser output efficiency existing in existing Q-switched lasers, the present invention provides a high peak narrow pulse laser based on laser gain sudden increase

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