All-fiber intermediate infrared high-energy passively Q-switched fiber laser

Abstract

The present invention relates to the technical field of intermediate infrared laser, and solves the technical problems that when an intermediate infrared passively Q-switched fiber laser in the prior art outputs an intermediate infrared laser light source at a 3[mu]m wave band, the outputted laser light source is low in energy and low in output efficiency. An all-fiber intermediate infrared high-energy passively Q-switched fiber laser comprises a random laser pumping source, a double-cladding Ho3+-doped ZBLAN optical fiber, and a single-cladding Dy3+-doped ZBLAN optical fiber which are connected in order, wherein a first fluoride fiber grating is etched at the front end of the double-cladding Ho3+-doped ZBLAN optical fiber, a second fluoride fiber grating is etched at the tail end of the single-cladding Dy3+-doped ZBLAN optical fiber, a resonant cavity is formed between the first fluoride fiber grating and the second fluoride fiber grating, thereby achieving the technical effect of outputting high-energy and high-efficiency intermediate infrared laser at the 3[mu]m wave band.

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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