An all-fiber mid-infrared high-energy passive Q-switched fiber laser

Abstract

The invention relates to the field of mid-infrared laser technology, and solves the technical problems of low energy and low output efficiency of the output laser light source when the mid-infrared passive Q-switched fiber laser used in the prior art outputs a mid-infrared laser light source in the 3 μm band. By providing an all-fiber mid-infrared high-energy passive Q-switched fiber laser, including: sequentially connected random laser pump sources, double-clad doped Ho3+ZBLAN fiber, single-clad doped Dy3+ZBLAN fiber, the double-clad A first fluoride fiber grating is written on the front end of the layer-doped Ho3+ZBLAN fiber, and a second fluoride fiber grating is written on the end of the single-clad Dy3+ZBLAN fiber, between the first fluoride fiber grating and the second A resonant cavity is formed between the fluoride fiber gratings, thereby achieving the technical effect of being able to output high-energy and high-efficiency 3μm-band mid-infrared lasers.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to an all-fiber mid-infrared high-energy passive Q-switched fiber laser. Background technique [0002] In recent years, the mid-infrared pulsed laser source in the 3 μm band has attracted the attention of many researchers because of its wide application in military, civil and scientific research fields. The 3μm band mid-infrared laser source can not only be used in laser countermeasures in national defense, but also in gas sensing and environmental monitoring. Compared with continuous laser, Q-switched pulsed laser can obtain higher peak power at lower average power, so its application is more extensive. [0003] Among various methods of producing mid-infrared lasers, fiber lasers have high brightness, high peak power, tunability, low lasing threshold, good output beam quality, high conversion efficiency, and high "surface area / volume" ratio, flexibility and flexibility...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides an all-fiber mid-infrared high-energy passive Q-switched fiber laser, which solves the problem of the output laser light source when the mid-infrared passive Q-switched fiber laser used in the prior art outputs a 3 μm band mid-infrared laser source. Technical problems of low energy and low output efficiency

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