Longwave-IR Optical Parametric Oscillator in Orientation-Patterned GaAs Pumped by a 2 micron Tm,Ho:YLF Laser (Preprint)
Journal article preprint
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIR
Pagination or Media Count:
We demonstrate longwave infrared LWIR generation with an optical parametric oscillator OPO based on quasi-phasematched orientation-patterned gallium arsenide OPGaAs. The OPGaAs OPO was directly pumped with a Q-switched lambda2.054 micron Tm,HoYLF laser. OPGaAs samples representing three different grating periods were used to explore the LWIR OPO performance yielding outputs ranging from lambda2.5-2.7 micron signal and lambda8.8-11.5 micron idler. Slope efficiencies for the combined signal and idler outputs reach as high as 26 while slope efficiencies for only the idler reached 8. Spectral measurements of OPO output confirm good agreement with theoretical calculations.