基于Tm,Ho晶体的种子光注入锁定可连续调谐2μ#21333;频激光器

项目名称： 基于Tm,Ho晶体的种子光注入锁定可连续调谐2μ#21333;频激光器

项目编号： No.60878016

项目类型： 面上项目

立项/批准年度： 2009

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： 哈尔滨工程大学

项目金额： 36万元

中文摘要： 激光二极管抽运Tm,Ho:YLF 激光器的输出波长为2μ#65292;大气穿透性好、人眼安全,在激光测距、激光遥感、医学等领域显示出越来越广泛的应用前景。本项目理论上发展了带注入项的Tm,Ho:YLF 激光器的多模速率方程理论模型，研究了实现理想种子光注入锁频的条件；给出了连续和脉冲Tm,Ho共掺固体激光器的热负载系数明确的解析表达式，分析了个激光参数对热负载系数的影响，并通过参数优化减小能量转递上转换对激光器输出性能的影响。实验上实现了连续输出的单频、窄线宽Tm,Ho:YLF种子激光器，最大输出功率可达160mW以上；实现了稳定输出的微秒脉冲宽度的被动调Q Tm,Ho:YLF；开展了声光主动调Q Tm,Ho:YLF激光器的研究，在此基础上测量了激光上能级的有效寿命，发现能量传递上转换效应明显地减小了激光上能级的有效寿命；实现了种子激光器对从激光器（调Q激光器）种子光注入锁频，得到了从激光器的输出频率随种子激光器注入光频率的变化关系，以及种子激光器注入功率对锁频范围的影响。

中文关键词： 单频激光器；Tm;Ho:YLF 晶体；窄线宽；连续调谐；注入锁定

英文摘要： The output wavelength of Tm,Ho:YLF laser is in 2μwave band, and this wavelength is eye-safe and high penetrable in atmosphere. So this kind of lasers have very wide applications in finding range, remote sensing, medicine etal fields. In theory, the multimode rate equation theory model of Tm,Ho:YLF laser with the injection term has been developed, and the condition of realizing the frequency locking by seed-injecting has been investigated. The analytical expressions of the thermal loading coefficient for the continuous wave and pulse Tm,Ho:YLF laser have been obtained, and the influences of laser parameters on the thermal loading coefficient have been analyzed. The influence of the energy transfer upconversion on the performances of the laser is reduced by optimizing the laser parameters. In experiment, the continuous wave, single frequency, and narrow linewidth Tm,Ho:YLF seeder laser has been realized, and the maximum output power is more than 160 mW. The stable microsecond pulsewidth passively Q-switched Tm,Ho:YLF laser has also been realized. The AO Q-switched Tm,Ho:YLF laser has been investigated, and the effective upper level lifetime has been measured. It is found that the energy transfer upconversion effect reduces the effective upper level lifetime. The frequency locking is realized by the method of seed-injecting. The frequency of the slave laser as a fuction of the frequency of the main laser, and the influence of the injection power from the seeder laser on the range of locking frequency are obtained.

英文关键词： single fequency laser; Tm;Ho:YLF crystal; narrow linewidth; continuously tunable; injection locking