钛宝石激光抽运的被动锁模Tm:YAG陶瓷激光实验研究

Ti:sapphire pumped passively mode-locked Tm:YAGceramic laser

本文采用连续钛宝石激光作抽运,掺杂浓度为6 at.%、长度为2.7 mm的Tm:YAG陶瓷作增益介质,通过引入半导体饱和吸收体获得了稳定的被动锁模运转.实验中获得的激光锁模功率为116.5 mW,中心波长为2007 nm,重复频率为109 MHz,通过自行搭建的腔外非共线强度自相关测量得到的脉冲宽度是55 ps.

A passively mode-locked Tm：YAG ceramic laser was demonstrated.Employing a 6 at.% Tm^3＋-doped sample with a length of 2.7 mm,we have realized stable mode-locked pulses with a repetition rate of 109 MHz by a semiconductor saturable absorber.A maximum output power of 116.5 mW was obtained at the central wavelength of 2007 nm.The corresponding pulse duration was determined to be 55 ps by a self-built noncollinear intensity auto-correlation setup.It is shown that Tm：YAG ceramics are excellent laser materials which can be used in ultrafast lasers with high-power and high-efciency output.