Abstract
Frequency conversion of CO laser radiation was experimentally studied in and GaSe nonlinear crystals. To enhance conversion efficiency, we applied a CO laser system “master oscillator power amplifier” with concurrent mode locking and switching. The laser system emitted -μs train of ns pulses. Internal efficiency of frequency doubling reached 37% in crystal and 5% in GaSe crystal. Two-stage frequency conversion (including second-harmonic and difference-frequency generation) in crystal under optical pumping by a selective two-spectral line CO laser was studied.
© 2015 Optical Society of America
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