Han Xiaohong, Zeng Heping
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China.
Opt Express. 2008 Nov 10;16(23):18883-8. doi: 10.1364/oe.16.018875.
We demonstrate a Kerr-lens mode-locked Ti:sapphire laser with an additional Yb(3+) doped Potassium Yttrium Tungstate crystal (Yb:KYW) in the laser cavity, where not only the pump threshold to start mode-locking but also the stable regions to maintain mode-locking can be well-controlled by varying the position of Yb:KYW nearby the confocal focus to change the intracavity Kerr-effects. The pump threshold is reduced down to 800 mW to start the mode-locking operation, which is about 27% less than that for a Ti:sapphire laser without an additional Yb:KYW.
我们展示了一种克尔透镜锁模钛宝石激光器，其激光腔内额外添加了掺镱（Yb(3+)）的钨酸钇钾晶体（Yb:KYW）。通过改变Yb:KYW在共焦焦点附近的位置来改变腔内克尔效应，不仅可以很好地控制启动锁模的泵浦阈值，还能控制维持锁模的稳定区域。启动锁模操作的泵浦阈值降低至800毫瓦，这比没有额外Yb:KYW的钛宝石激光器低约27%。
