Quick-start intermediate infrared laser and corresponding polycrystal switching device

Abstract

The invention discloses a quick-start intermediate infrared laser and a corresponding polycrystal switching device. A 813nm semiconductor laser, an energy transmission optical fiber, a first focusing mirror, a second focusing mirror, a first 45-degree beam splitter, an intermediate infrared parametric light output mirror, a polycrystal switching device, an intermediate infrared parametric light total reflection mirror and a second 45-degree beam splitter are arranged in a laser straight cavity from left to right; a 1084nm fundamental frequency light total reflection mirror, a third 45-degree beam splitter, a dispersion prism, a photosensitive element and a single chip microcomputer are arranged in a laser zigzag cavity, and the 1084nm fundamental frequency light total reflection mirror is opposite to the second 45-degree beam splitter in position; the third 45-degree beam splitter corresponds to the first 45-degree beam splitter in position; the dispersion prism corresponds to the third 45-degree beam splitter in position; the photosensitive element corresponds to the dispersion prism in position; and a single-chip microcomputer is connected with the photosensitive element and the polycrystal switching device.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a fast-start mid-infrared laser and a corresponding multi-crystal switching device. Background technique [0002] Mid-infrared laser (3-5μm) has a wide application background. The laser in the 3-5μm band is one of the extremely important bands in the atmospheric projection window. The laser in this band is widely used in military and civilian fields such as photoelectric countermeasures, remote sensing detection, spectral analysis, and medical diagnosis, and has important research significance. [0003] Mid-infrared optical parametric oscillation technology (OPO) has the advantages of fine and compact structure, wide wavelength tuning range and high output power. Periodically poled lithium niobate crystal (PPLN) has the advantages of large nonlinear coefficient, wide light transmission range, convenient temperature tuning, and various wavelength tuning methods, so it has gradually become a...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention provides a quick-start mid-infrared laser and a corresponding multi-crystal switching device. Through the application of laser technology and single-chip microcomputer technology, the rapid output of 3.8 μm mid-infrared laser can be realized, which breaks through the traditional fast start-up process. Infrared lasers cannot adapt to the technical limitations of rapid laser output in complex environments by quickly switching periodically polarized crystals. It also solves the problems of large volume, difficult adjustment and low integration of current fast-start mid-infrared lasers.

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