Continuous pulse-switchable intermediate-infrared fiber laser

Abstract

The invention relates to a continuous pulse-switchable intermediate-infrared fiber laser, and belongs to the technical field of intermediate-infrared laser. The laser comprises a first laser pumping source, a first convex lens, a dichroscope, a second convex lens, a first rare earth ion doped fiber, a second rare earth ion doped fiber and a second laser pumping source connected sequentially, the head end of the first rare earth ion doped fiber is etched with a first fiber grating, the tail end of the rare earth ion doped fiber is welded to the head end of the second rare earth ion doped fiber, and the tail end of the second rare earth ion doped fiber is etched with a second fiber grating, and welded to a tail fiber of the second laser pumping source. Extra devices are not needed, flexible switching between infrared continuous and pulse filer laser can be realized by only controlling the switch of the laser pumping source, and the system structure is simplified greatly.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to a mid-infrared fiber laser which can be switched between continuous and pulse. Background technique [0002] The 2-20 μm mid-infrared band not only contains two important atmospheric transmission windows, but also covers the absorption peaks of many molecules, atoms, and chemical bonds. Therefore, mid-infrared laser sources with wavelengths in this range are of great importance in military, civilian, and scientific research Applied prospects. 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 of high-performance lasers Mid-infrared fiber lasers have important scientific significance and application value. According to different time-...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a mid-infrared fiber laser that can be switched between continuous and pulsed lasers, which solves the technical problem of complex system structures in lasers that can flexibly switch between continuous and pulsed lasers in the prior art

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