介稳腔内激光偏振可塑性实验及机理研究

项目名称： 介稳腔内激光偏振可塑性实验及机理研究

项目编号： No.61505058

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 庄凤江

作者单位： 华侨大学

项目金额： 20万元

中文摘要： 轴对称偏振激光是现今激光器件研究的主要热点之一。其独特的偏振特性和潜在的应用价值，已经引起了研究人员的广泛关注。为了获得高效高稳定性的可控偏振光，有效地处理全固态激光器件热效应和谐振腔设计成为一个亟待解决的关键物理问题。本项目将采用介稳腔结构，借助其优异的模式选择能力探索实现偏振态之间切换的有效方法，揭示介稳腔内激光偏振可塑性机理。此外，为缓解热效应和偏振退化，采用板条结构激光晶体和4f泵浦系统，探索有效的热管理技术。由于腔内的多重物理耦合效应引起子午面和弧矢面的稳定性的差异，TE波和TM波被分离和提取获得特定的激光偏振态。改进热控制、泵浦系统和谐振腔等因素，获得稳定可控的轴对称偏振激光，为新型固态激光器件的发展作出贡献。

中文关键词： 板条激光器；热效应；激光谐振腔；偏振选择器件

英文摘要： Axially symmetric polarized laser beam is one of hot topics in the areas of the developed laser devices in recent years. Axially symmetric polarized beams have received considerable attention due to their unique characteristics in polarization and potential applications. An effective solution to deal with the thermal effect and cavity design in the all solid state lasers would be a pressing physical problem for obtaining the controllable polarized laser with high effective and stability. In this proposal, an effective approach for the switching of the polarization states is proposed by the using of a metastable laser resonator due to its excellent mode selectivity. The mechanism of the plasticity of polarization would be revealed in the metastable resonator. Moreover, a 4f-pumping scheme with a slab crystal would be developed for alleviating the thermal effect and polarization degradation to explore effective thermal management techniques. Since the intra-cavity multi-physics coupling effect causes the different stabilities in the tangential and sagittal planes，the specific polarization state can be achieved by the separation and extraction of TE and TM waves. The stable and switchable axially symmetric polarized laser would be generated by further refinement of some important experimental parameters including thermal controlling, pumping system and the resonator, which contributes to the development of novel solid-state laser devices.

英文关键词： Slab laser;Thermal effects;Laser resonators;Polarization-selective devices