Dual-wavelength pumping intermediate infrared Raman fiber laser

Abstract

The invention relates to a dual-wavelength pumping intermediate infrared Raman fiber laser, and solves technical problems in the prior art that obtain laser whose wavelength range is in an interval of 3-6 [mu]m is difficult. The invention provides a dual-wavelength pumping intermediate infrared Raman fiber laser, comprising a semiconductor laser pumping source, a Tm-doped fiber laser pumping source, a dichroic mirror, a coupling lens, a double-cladding Er<3+>ZBLAN doped fiber, a fluoride fiber bragg grating, a sulfide fiber, and a sulfide fiber grating pair. One end of the double-cladding Er<3+>ZBLAN doped fiber is internally provided with the fluoride fiber bragg grating, and the other end is fused with the sulfide fiber. A first resonant cavity is formed between the fusion point of the fluoride fiber bragg grating FBG0 and the sulfide fiber. The sulfide fiber grating pair arranged in the sulfide fiber forms a second resonant cavity. Laser in two different wavelengths passes through the dichroic mirror, the coupling lens couples the laser in the double-cladding Er<3+>ZBLAN doped fiber, obtaining pumping light in wavelength of 2.7-2.9 [mu]m and 3.2-3.9 [mu]m, then the light enters into the sulfide fiber, and oscillates in the second resonant cavity, so as to obtain laser in wavelength of 3-6 [mu]m.

Description

technical field [0001] The invention relates to the technical field of mid-infrared lasers, in particular to a dual-wavelength pumped mid-infrared Raman fiber laser. Background technique [0002] Mid-infrared laser light sources with wavelengths in the atmospheric window of the 3-6 μm region are widely used. For example, high-power mid-infrared laser light sources can be applied to laser countermeasures in national defense, mainly aimed at the saturation interference and destructive blinding of infrared lasers on infrared focal plane array detectors, and can effectively resist the increasingly serious threat of infrared guided early warning aircraft. 3 The ~6μm mid-infrared laser countermeasure weapon is a new type of defense weapon system that integrates the functions of warning, tracking, aiming and jamming, suppression, and blinding, and can effectively interfere with infrared staring imaging guided missiles; secondly, the 3-6μm mid-infrared laser can not only detect A w...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a dual-wavelength pumped mid-infrared Raman fiber laser, which solves the technical problem in the prior art that it is difficult to obtain laser light with a wavelength range of 3-6 μm

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