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27 May 1998 Synchronously pumped mid-infrared OPOs using silver gallium sulphide
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Synchronously pumped optical parametric oscillators (OPOs) offer great promise for the generation of high average power radiation in the mid-infrared waveband. In this report, we assess the potential of using a silver gallium sulphide (AgGaS2) OPO to achieve such high powers. A number of different OPO cavity configurations have been designed and tested to optimize the conversion efficiency. The pump laser (Nd:YAG) operates at 1.064 micrometer and is both mode-locked and Q-switched. The Q-switch repetition rate is variable between 0.5 and 2 kHz and the maximum mean power available is 8.5 W. Both linear and ring cavities have been tested and the most efficient design produced separate high quality signal and idler beams of average power 1.45 W (1.44 micrometers) and 620 mW (4.06 micrometers) at a pulse repetition rate of 2 kHz. It is believed that these near and mid-infrared powers represent the highest to date with a AgGaS2 OPO.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kenneth J. McEwan, Jonathan A. C. Terry, and John Payne "Synchronously pumped mid-infrared OPOs using silver gallium sulphide", Proc. SPIE 3265, Solid State Lasers VII, (27 May 1998);

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