Generation of Multiple Mid Infrared Wavelengths Using PPLN and AgGaSe2
Conference proceedings rept.
ARMY COMMUNICATIONS ELECTRONICS COMMANDFORT MONMOUTH NJ NIGHT VISION AND ELECTRONIC SENSORS DIR
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We report the demonstration of simultaneously generating two mid infrared wavelengths using both PPLN and AgGaSe2 nonlinear materials pumped by a KTP OPO at 1.54 mm. In either case, the signal and idler waves were near 2.5 mm and 4.0 mm. The architecture we chose is capable of producing three important IRCM wavelength bands near 2.5, 3.5 and 4.0 mm in the mid infrared region, and of providing rapid wavelength tuning when all PPLN OPOs are used. The experiment reported here with PPLN shows better performance over that with AgGaSe2 and is, to the best of our knowledge, the first such multiband OPO operation with PPLN. In initial experiments with PPLN, we obtained output powers of 542 mW and 453 mW near 2.5 mm and 4.0 mm, with conversion efficiencies of 30 and 25 respectively. The combined MIR output was 995 mW with a combined conversion efficiency of 55.
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