LD泵浦Cr:YAG被动调Q内腔式SrWO4锁模拉曼激光器实验研究

摘要

A laser-diode-pumped Cr:YAG passively Q-switched intracavity SrWO4 mode-locked Raman laser is used to obtain stable Q-switched mode-locked Raman pulse of 100%modulation depth. An average output power of 968 mW is obtained when the incident pump power is 5.2 W, the conversion efficiency of pump to Raman laser is 18.6%.The Q-switched pulses with repetition rate of 51 kHz and pulse width of 7 ns is obtained. To our knowledge, this is the most efficient at present. And the forming reason of mode-locked Raman laser pulse in the experiment is analyzed. The polarization mechanism is researched and reasonable explanations are analyzed.%采用LD泵浦Cr:YAG被动调Q的内腔式SrWO4锁模拉曼激光器获得了稳定的、调制深度100%的调Q锁模拉曼脉冲.在泵浦功率5.2 W时,获得了968 mW的平均输出功率,泵浦光到拉曼光的转换效率为18.6%,调Q脉冲重复率51 kHz,脉冲宽度7 ns,这是目前为止报道的内腔式SrWO4拉曼激光器所获得的最大的转换效率,并对实验中出现的拉曼自锁模现象进行了分析.最后,对实验中基频光与拉曼光出现的偏振状态进行了相关研究,给出合理的解释.