A broadband tunable mid-infrared fiber laser

Abstract

The invention relates to the mid-infrared laser technology field and especially relates to a mid-infrared fiber laser with a tunable wavelength and a broadband. The laser comprises a first laser pumping source, a second laser pumping source, a first rare earth ion doped fiber, a second rare earth ion doped fiber, a fluoride fiber bragg grating and a planar blazed grating. A beam combination intersection position of the first laser pumping source and the second laser pumping source is successively provided with a first dichroscope, a first convex lens and a second dichroscope. An output optical path of the second dichroscope is provided with the first rare earth ion doped fiber. The first rare earth ion doped fiber and the second rare earth ion doped fiber are welded. The second rare earth ion doped fiber and the fluoride fiber bragg grating are welded. A second convex lens is arranged on an output optical path of the fluoride fiber bragg grating and in front of the planar blazed grating. Through one fiber laser, tunable output of 3-3.8micron wavelength laser is realized.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to a mid-infrared fiber laser with tunable wavelength broadband. Background technique [0002] The 3-5μm mid-infrared band is not only an important atmospheric transmission window, but also covers the absorption peaks of many important molecules, atoms, and chemical bonds. Detection, infrared countermeasures and other fields have important application 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. At present, the most commonly used method to generate mid-infrared fiber laser is to use rare earth ion doped fib...

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a wavelength broadband tunable mid-infrared fiber laser, which solves the technical problem in the prior art that it is difficult to achieve complete coverage of a wide band and tunable output wavelength with a single fiber laser

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