title: Frequency conversion of mode-locked and Q-switched CO laser radiation with efficiency up to 37%.
abstract: Frequency conversion of CO laser radiation was experimentally studied in ZnGeP(2) and GaSe nonlinear crystals. To enhance conversion efficiency, we applied a CO laser system "master oscillator power amplifier" with concurrent mode locking and Q switching. The laser system emitted ∼1-μs train of ns pulses. Internal efficiency of frequency doubling reached 37% in ZnGeP(2) crystal and 5% in GaSe crystal. Two-stage frequency conversion (including second-harmonic and difference-frequency generation) in ZnGeP(2) crystal under optical pumping by a selective two-spectral line CO laser was studied.
authors.forename: Yu M
authors.initials: YM
authors.lastname: Andreev
authors.forename: O V
authors.initials: OV
authors.lastname: Budilova
authors.forename: A A
authors.initials: AA
authors.lastname: Ionin
authors.forename: I O
authors.initials: IO
authors.lastname: Kinyaevskiy
authors.forename: Yu M
authors.initials: YM
authors.lastname: Klimachev
authors.forename: A A
authors.initials: AA
authors.lastname: Kotkov
authors.forename: A Yu
authors.initials: AY
authors.lastname: Kozlov