Flaw detection device and flaw detection method for nonlinear optical crystal

Abstract

The invention relates to the technical field of flaw detection of nonlinear optical crystals and in particular relates to a flaw detection device for a nonlinear optical crystal and a using method thereof. The flaw detection device comprises a laser generator, an attenuator, an energy meter, an optical shutter, a convergent lens and a microscope, wherein the laser generator is used for generating laser irradiating the nonlinear optical crystal; the convergent lens is positioned on a light path of the laser and is used for converging the laser to the nonlinear optical crystal; the optical shutter is positioned on a laser light path between the laser generator and the convergent lens and is used for controlling on / off of the laser light path; the energy meter is used for measuring the energy of the laser irradiating the nonlinear optical crystal; the attenuator is used for adjusting the energy of the laser irradiating the nonlinear optical crystal; the microscope is used for observing the flaw conditions of the nonlinear optical crystal under laser irradiation. By utilizing the flaw detection device, the irradiation laser intensity and the flaw conditions of the nonlinear optical crystal to be detected under irradiation of the laser intensity can be conveniently obtained, and multiple groups of continuous flaw detection experiment are conveniently performed.

Description

technical field [0001] The invention relates to the technical field of optical flaw detection, in particular to a flaw detection device and a flaw detection method for nonlinear optical crystals. Background technique [0002] With the rapid development of laser technology, the application of nonlinear optical crystals is becoming more and more extensive, playing an important role in various fields such as scientific research, industrial production and social life. Especially when realizing the laser output of solid-state lasers with different wavelengths from the infrared band to the ultraviolet region, the most common and effective method is to use nonlinear optical crystals for frequency conversion. In high-energy and high-power lasers, these crystals are easily damaged, resulting in a decrease in beam quality, so the ability to resist laser damage of such crystals has become one of the most important factors limiting the output power of lasers. Therefore, it is necessary...

AI Technical Summary

Problems solved by technology

Most of the existing flaw detection devices use direct laser irradiation combined with microscope observation, and then give experimental data in the literature, and there is no detailed description of nonlinear optical crystal flaw detection devices and measurement methods

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