Compensation of influence of environmental temperature on liquid crystal random laser through voltage

Abstract

The invention discloses a method for compensating the influence of environmental temperature on a liquid crystal random laser through voltage. The method comprises the following steps: firstly, focusing a pump light emitted from a laser by lens, and irradiating focused pump light to a liquid crystal random laser, wherein the liquid crystal random laser is of a box-shaped structure composed of two pieces of glass, the gain medium of the liquid crystal random laser is a mixture solution composed of liquid crystal microdrop and laser dye; then, placing a detector before or behind the liquid crystal random laser so as to detect emitted random laser; and subsequently, applying a basic voltage to the liquid crystal random laser through a glass layer, when the environmental temperature is higher than the optimal working temperature of the liquid crystal random laser, modulating a power supply so as to reduce a loaded voltage value, and when the environmental temperature is lower than the optimal working temperature of the liquid crystal random laser, modulating the power supply so as to boost the loading voltage value. The influence of the environmental temperature on the liquid crystal random laser is modified effectively in a mode of boosting the voltage; and the device is simple in structure, convenient to manufacture and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a method for changing the birefringence of liquid crystals under voltage control so as to improve the influence of environmental temperature changes on the random laser radiation characteristics of liquid crystals. Background technique [0002] In recent years, random lasers have become a hot research field in the international laser community. The random laser radiation originates from the excited disordered medium, and provides optical feedback through the multiple scattering of the radiated light in the medium, so as to obtain a large gain without an external resonant cavity. Liquid crystal random lasers are random lasers in which the laser gain medium is doped in the liquid crystal material and the liquid crystal is used as the disordered scattering medium. Compared with traditional lasers, it is small in size, easy to integrate, diverse in structure, and easy to ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the influence of the ambient temperature on the liquid crystal random laser cannot be ignored when it is in use, and to provide a method for compensating the influence of the ambient temperature on the liquid crystal random laser by voltage compensation

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