Tunable mid-infrared light source based on electrooptic effect and optical fiber amplifier

Abstract

The invention relates to a mid-infrared light source, especially to a tunable mid-infrared light source based on an electrooptic effect and an optical fiber amplifier. The mid-infrared light source is provided with a seed light source, an optical fiber amplifier, a coupling system, an input mirror of an optical parameter oscillator and a non-linear crystal and an output coupling mirror, wherein the non-linear crystal is used for frequency transformation. The seed light source is equipped with a semiconductor laser, a collimated optical system, a focused optical system, a laser crystal, an electro-optic crystal used for active adjustment Q, a polarizer and an output mirror of an active electro-optic adjustment Q laser, wherein the polarizer is utilized cooperatedly with the electro-optic crystal. The coupling system is arranged between the seed light source and the optical fiber amplifier. The optical fiber amplifier is provided with a fiber and a semiconductor laser pump source, which has a fiber coupling output. And the input mirror of the optical parameter oscillator, the non-linear crystal for frequency transformation and the output coupling mirror are placed successively from left to right. According to the invention, a mid-infrared laser output with excellent performances can be obtained; a high efficient heat radiation problem of a mid-infrared laser can be solved; a whole volume is reduced; and a light beam quality and a transition efficiency of an output light are improved.

Description

technical field [0001] The invention relates to a mid-infrared light source, in particular to a tunable mid-infrared light source based on an electro-optical effect and an optical fiber amplifier. Background technique [0002] Solid-state lasers, especially all-solid-state lasers, are widely used in military affairs, industrial processing, and scientific research due to their compact structure, high conversion efficiency, and long life. Using the all-solid-state laser in the near-infrared band as the pump source and using the optical parametric oscillator is one of the most effective means to obtain a 3-5 μm mid-red laser source. So far, although mid-infrared lasers have achieved certain development, but in the aspects of high repetition frequency of mid-infrared light source, high peak power source acquisition, pump source selection, broadband design of mid-infrared band dielectric film, low absorption, high loss control, etc. There are still many technical problems to be ...

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Problems solved by technology

[0003] The object of the present invention is to provide an electro-optic effect and fiber amplifier based on the electro-optical effect and the conversion efficiency that can obtain a mid-infrared laser output with excellent performance, can solve the problem of high-efficiency heat dissipation of the mid-infrared laser, can reduce the volume of the whole machine, and improve the beam quality and conversion efficiency of the output light. Tunable mid-infrared light source for

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