Pelouch W S, Powers P E, Tang C L
Opt Lett. 1992 Aug 1;17(15):1070-2. doi: 10.1364/ol.17.001070.
A broadly tunable femtosecond optical parametric oscillator (OPO) based on KTiOPO(4) that is externally pumped by a self-mode-locked Ti:sapphire laser is described. Continuous tuning is demonstrated from 1.22 to 1.37 microm in the signal branch and from 1.82 to 2.15 microm in the idler branch by using one set of OPO optics. The potential tuning range of the OPO is from 1.0 to 2.75 microm and requires three sets of mirrors and two crystals. Without prisms in the OPO cavity, 340 mW (475 mW) of chirped-pulse power is generated in the signal (idler) branch for 2.5 W of pump power. The total conversion efficiency as measured by the pump depletion is 55%. With prisms in the cavity, pulses of 135 fs are generated, which can be shortened to 75 fs by increasing the output coupling.
描述了一种基于KTiOPO(4)的宽可调谐飞秒光学参量振荡器（OPO），它由自锁模钛宝石激光器进行外部泵浦。通过使用一组OPO光学元件，在信号支路中实现了从1.22至1.37微米的连续调谐，在闲频支路中实现了从1.82至2.15微米的连续调谐。该OPO的潜在调谐范围为1.0至2.75微米，需要三组反射镜和两块晶体。在OPO腔中不使用棱镜时，对于2.5瓦的泵浦功率，在信号（闲频）支路中产生340毫瓦（475毫瓦）的啁啾脉冲功率。通过泵浦损耗测量的总转换效率为55%。在腔中使用棱镜时，产生了135飞秒的脉冲，通过增加输出耦合可将其缩短至75飞秒。
