Mid-infrared multi-band all-fiber soft glass laser and method for obtaining laser

Abstract

The invention provides a mid-infrared multi-band all-fiber soft glass laser and a method for obtaining a mid-infrared multi-band fiber laser by using the laser. The laser comprises a laser pumping source, a pigtail fiber of the laser pumping source, and a first optical fiber fusion joint connected in sequence. , the first fiber grating, the second fiber grating, the first rare earth ion-doped fiber, the third fiber grating, the fourth fiber grating, the second fiber splicing point, the fifth fiber grating, the sixth fiber grating, the seventh fiber grating, The eighth fiber grating, the second rare-earth ion-doped fiber, the ninth fiber grating, the tenth fiber grating, the eleventh fiber grating, and the twelfth fiber grating; the present invention adopts a dual-band cascade Ho-doping pumped by a semiconductor laser 3+ Fluoride fiber laser as pump source, ring composite core structure of Pr 3+ , Tb 3+ The co-doped sulfide fiber is used as the gain medium, and the sulfide fiber grating array is used as the resonator feedback and output coupling, which can realize the simultaneous output of 3.7μm, 4.89μm, 5.1μm and 7.5μm fiber lasers in the all-fiber structure.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a mid-infrared multi-band all-fiber soft glass laser and a method for obtaining mid-infrared multi-band fiber laser using the laser. Background technique [0002] The 2-20 μm mid-infrared band not only includes two important atmospheric transmission windows (3-5 μm and 8-12 μm), but also covers the absorption peaks of many important molecules, atoms, and chemical bonds. Therefore, mid-infrared laser sources with wavelengths in this range It has important application prospects in the fields of biomedicine, material processing, atmospheric communication, gas detection, and infrared countermeasures. As a new type of laser, fiber laser has a series of advantages such as high conversion efficiency, good heat dissipation, good beam quality, and easy integration compared with traditional lasers such as solid-state lasers, gas lasers, and semiconductor lasers. Therefore, the development o...

AI Technical Summary

Problems solved by technology

However, in the mid-infrared region with longer wavelengths, it is currently difficult to achieve fiber laser output due to limited energy level radiation transition capabilities. In addition, in the mid-infrared region with wavelengths greater than 3 μm, simultaneous output of multiple band fiber lasers has not yet been achieved. effective solution, and the realization of the above-mentioned fiber laser can further expand the application of mid-infrared fiber laser in practice

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