Fiber laser pumped Mid-IR source

摘要

We report on a compact and efficient 3-5 μm laser source, based on a 1.9 μm Tm:fiber laser, pumping a Q-switched 2.1 μm Ho:YAG-laser, which in turn pumps a ZnGe?2 (ZGP) optical parametric oscillator (OPO). Recent advances in Tm:fiber laser technology has resulted in practical high power 1.9 urn sources, which are ideal pump sources for high pulse rate Q-switched Ho:YAG lasers. Using a 15 W commercial Tm:fiber laser we obtained 5.6W average output power from the Ho:YAG laser and 3 W from the ZGP OPO.