基于Tm,Ho共掺固体激光器的可控光学双稳态及光开关研究

项目名称： 基于Tm,Ho共掺固体激光器的可控光学双稳态及光开关研究

项目编号： No.61275138

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 张新陆

作者单位： 天津工业大学

项目金额： 78万元

中文摘要： Tm,Ho共掺固体激光器的输出波长为2μm，处于人眼安全波段，大气穿透性好，在激光通信、激光遥感和红外光电对抗等领域有着重要的应用价值。为解决2μm激光大气通信的可控光开关这一关键基础技术问题，本项目拟深入研究Tm,Ho共掺固体激光器产生光学双稳态的物理机制，探索调节双稳区宽度的有效方法，实现基于光学双稳原理的2μm波段可控光开关器件。具体开展以下研究内容：(1)建立光学双稳Tm,Ho共掺固体激光器的准三能级速率方程理论模型，研究双稳激光器的稳态和动态输出特性，揭示其光学双稳态产生的物理机理和必要条件；(2)研究各可变参数对双稳激光器双稳区宽度的影响，以实现双稳区宽度在一定范围内的稳定可调；(3)在对双稳开关动力学理论分析的基础上，优化设计方案，首次在光学双稳Tm,Ho固体激光器中实现由抽运光控制的2μm波段可控双稳光开关。本项目的研究结果可应用于2μm激光大气通信、光记忆和光存储等系统。

中文关键词： 固体激光器；准三能级；Tm-Ho共掺激光晶体；光学双稳；光开关

英文摘要： The output wavelength of Tm,Ho codoped solid state lasers is 2μm, which is in the eye-safe waveband and has good atmosphere penetrability. Thus Tm,Ho codoped solid state lasers have important applications in the fields of laser communications, remote sensing, and photoelectric countermeasure. To solve the critical technical issues of optical switch in 2μm laser communications, the project aims to deeply investigate the physical mechanism of optical bistability in Tm,Ho codoped solid state lasers, to explore a convenient method of tuning the bistability region width, and to realize the 2μm waveband controllable optical switch based on optical bistability. The main research contents as following: (1) The quasi-three -level rate equation theory model of optical bistability is established in Tm,Ho codoped solid state lasers. The steady-state and dynamic output performances of the optical bistability lasers are systematically investigated，and the basic physical mechanism and necessary condition of optical bistability are revealed. (2) The influences of changeable parameters on the bistability region width of bistable laser are investigated, and the stable tuning of the bistability region width is realized in a certain range. (3) On the basis of theoretical analysis of bistability switch kinetics, the design scheme of

英文关键词： solid state laser；quasi-three-level；Tm-Ho codoped laser crystal；optical bistability；optical switch