新型薄片式铯蒸气激光器V型泵浦方法研究

Diode-Pumped Cesium Vapor Laser (DPCVL), which has high Stokes efficiency (95.3%), offers a way to high power, high efficiency, high beam quality and near-infrared (895 nm) output. Since the coefficient of heat conduction of the gain medium in a DPCVL is smaller than that of the solid-state laser, there will be distribution of temperature gradient in the gas cell which must seriously affect the beam quality of a DPCVL. To reduce the temperature gradient, we will propose a new type of DPCVL, Thin-disk V-shaped DPCVL, in which the vapor cell is a thin-disk and the light path of pump system is V-shaped. In this new kind laser system, the pump light and the output laser can be separated easily. We firstly theoretically study the influences of the important factors on the laser systems, including single pump source system, 3 pump sources system and multiple pump sources system. Then, the optimum condition will be obtained. At last, an experimental Thin-disk V-shaped DPCVL setup will be built. After realization of the laser output, the whole theoretical model will be experimentally verified. The study is thought to be very important for realizing a high-powered DPAL with high beam-quality in the future.

半导体激光泵浦铯蒸气激光器（DPCVL）具有高达95.3%的理论斯托克斯效率，可提供高功率、高效率、高光束质量的近红外波段激光输出。由于DPCVL采用了气体激光介质，其温度梯度分布会对激光输出特性特别是光束质量产生极其不利的影响。针对高功率泵浦时DPCVL温度梯度过高的问题，本项目研究利用V型泵浦结构的新型薄片式铯蒸气激光器。采用V型泵浦结构可以有效解决端面泵浦时由于泵浦光与输出激光的波长过于接近而不易分离的难题。本项目首先分别对三种V型泵浦激光系统进行理论计算，分析各关键参数对激光输出的影响并进行优化处理，最后搭建激光实验平台实现单路V型泵浦激光振荡，实验验证并优化整个理论体系。本项目的研究对将来构建高光束质量、高功率的DPAL系统具有重要意义。

半导体激光泵浦铯蒸气激光器（DPCVL）具有高达95.3%的理论斯托克斯效率，可提供高功率、高效率、高光束质量的近红外波段激光输出。由于DPCVL采用了气体激光介质，其温度梯度分布会对激光输出特性特别是光束质量产生极其不利的影响。针对高功率泵浦时DPCVL温度梯度过高的问题，本项目研究利用V型泵浦结构的新型薄片式铯蒸气激光器。采用V型泵浦结构可以有效解决端面泵浦时由于泵浦光与输出激光的波长过于接近而不易分离的难题。本项目首先分别对V型泵浦激光系统进行理论计算，分析各关键参数包括入射角度、薄片蒸气池厚度、蒸气池半径、蒸气池加热温度等对激光输出的影响并进行优化处理，最后搭建激光实验平台实现单路V型泵浦激光振荡，实验验证并优化整个理论体系。本项目的研究对将来构建高光束质量、高功率的DPAL系统具有重要意义。