中国激光, 2017, 44 (7): 0701002, 网络出版: 2017-07-05
绿光半导体激光器直接抽运的钛宝石飞秒脉冲
Ti∶Sapphire Femtosecond Pulses Pumped Directly by Green Diode Lasers
激光技术 钛宝石激光器 半导体激光器抽运源 克尔透镜锁模 飞秒脉冲 laser technique Ti∶sapphire laser diode laser pumping source Kerr-lens mode locking femtosecond pulses
摘要
对两个1.45 W/520 nm绿光半导体激光器的输出光束进行整形, 再将其聚焦到钛宝石激光晶体上进行抽运, 并结合GTI(Gires-Tournois Interferometer)镜对腔内色散给予补偿, 实现了稳定的克尔透镜锁模运转, 输出脉冲激光的脉宽为91 fs, 输出功率为208 mW, 输出单脉冲能量为1.59 nJ;优化腔型参数后, 获得的最窄脉宽为82 fs;缩短腔长后, 获得的最高输出功率为232 mW。
Abstract
The laser beams emitted from a pair of 520 nm/1.45 W green diode lasers are shaped and focused on a Ti∶sapphire laser crystal to complete the pumping process. The intracavity dispersion is compensated by using the GTI (Gires-Tournois interferometer) mirrors. The stable Kerr-lens mode locking state is achieved with an output pulse width of 91 fs, an output power of 208 mW, and a single pulse energy of 1.59 nJ. The narrowest pulse width of 82 fs is further realized after the optimization of cavity-type parameters and the maximum output power reaches 232 mW when the cavity length is shortened.
王向林, 胡晓鸿, 徐鹏, 张伟, 杨直, 王屹山. 绿光半导体激光器直接抽运的钛宝石飞秒脉冲[J]. 中国激光, 2017, 44(7): 0701002. Wang Xianglin, Hu Xiaohong, Xu Peng, Zhang Wei, Yang Zhi, Wang Yishan. Ti∶Sapphire Femtosecond Pulses Pumped Directly by Green Diode Lasers[J]. Chinese Journal of Lasers, 2017, 44(7): 0701002.