Medium infrared high-power laser light source basedon erbium-ytterbium co-doped double-clad fiber

Abstract

A total of Erbium Ytterbium-doped double-clad fiber in the high-power infrared laser light source, its composition include: high-power semiconductor lasers and from the high-power laser diode output followed by the establishment of fiber-to the first - fiber gratings, and the second fiber grating, Er-Yb co-doped double-clad fiber, collimating lens, focusing lens, nonlinear crystal and output collimating lens. Erbium Ytterbium described in co-doped double-clad fiber fusion is near the 1.06 mu m wavelength lamda1 and near the 1.56 mu m wavelength lamda2 with high reflectivity of the first fiber grating, FBG second Yb co-doped with erbium double pack at the other end of the fiber end face of a resonant cavity to achieve wavelength lamda1 and lamda2 high power laser output and through achromatic lens focuses on nonlinear crystal, in the nonlinear crystal within the difference frequency, the collimator output lens optical output of high-power infrared laser. This invention is the high conversion efficiency of laser, simple structure, small size, light weight, high system stability advantages.

Description

technical field [0001] The invention relates to a high-power mid-infrared laser source, in particular to a mid-infrared high-power laser source based on erbium-ytterbium co-doped double-clad fiber. Background technique [0002] In recent years, the extension of the output wavelength of lasers to the mid-infrared has received more and more attention, not only because the absorption line intensity of gas molecules in the mid-infrared wavelength region is several orders of magnitude higher than that in the near-infrared region, so the mid-infrared laser Spectral technology has a very important application prospect, and because the 3-5μm band is the window band of the atmosphere, in this band the laser has a strong penetrating power to the fog and smoke, and the transmission on the sea level is less affected by the scattering of gas molecules. , so it is suitable for use in lidar, photoelectric countermeasures and other fields. At present, the technologies for obtaining mid-inf...

AI Technical Summary

Problems solved by technology

See the prior art [OPTICSEXPRESS.14: 3936-3941, 2006]. In this technology, since the resonant cavity is formed by the coated cavity sheet, it is impossible to realize the all-fiber laser, and its popularization and application are limited.

Images