Implementation method for laser opening temperature impact resistant non-linear optical frequency conversion

Abstract

The invention provides an implementation method for laser opening temperature impact resistant non-linear optical frequency conversion. In the method, a fundamental frequency laser (1), optical crystals (2 and 3) and temperature control systems (7 and 8) are involved; two sets of non-linear optical frequency conversion devices are utilized; the temperatures of the two sets of non-linear optical frequency conversion devices are respectively set slightly higher and slightly lower than an optimal phase matching temperature; and when the laser is opened to make a proportion integration differentiation (PID) temperature control system generate temperature fluctuation within a certain range, the crystals in the two sets of systems respectively deviate from and approach the optimal phase matching temperature more, so that the constant overall conversion efficiency is maintained. By the method, the problem of output laser power fluctuation when the fundamental frequency laser is opened to cause the temperature fluctuation of the temperature control systems is solved; and by the implementation method for the laser opening temperature impact resistant non-linear optical frequency conversion, the defect of laser output power fluctuation of frequency conversion laser output power caused by the temperature fluctuation of the non-linear optical crystals when the fundamental frequency laser is just opened through the non-linear optical frequency conversion is overcome.

Description

【Technical field】 [0001] The invention relates to nonlinear optics, in particular to a method for realizing frequency conversion of nonlinear optics with resistance to light temperature shock. It is mainly used in the production process of nonlinear optical frequency conversion equipment. 【Background technique】 [0002] The nonlinear optical frequency conversion technology is an effective way to extend the laser frequency range, and the most critical factor affecting the frequency conversion efficiency is the phase matching problem of the nonlinear optical crystal. The method of temperature phase matching is the most commonly used phase matching method in nonlinear optical frequency conversion. The nonlinear optical frequency conversion device in the prior art, including optical crystal and temperature control system, usually uses a crystal for one frequency conversion, puts it in the temperature control system, and maintains its temperature constant at its optimum through ...

AI Technical Summary

Problems solved by technology

This characteristic of nonlinear optical temperature phase matching has a great impact on equipment such as laser marking machines that require frequent switching of lasers, which will cause the problem of unstable laser output power when the laser is first turned on, which will eventually affect marking. Effect

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