Double-range (λ = 2.6–2.9 and 4.9–6.0 μm) slab RF discharge CO laser system with intracavity frequency conversion in temperature-controlled ZnGeP2 crystal

Compact Radio Frequency Discharge-Pumped Slab CO Laser System with a Zinc Germanium Phosphide (ZnGeP2) Sum-Frequency Generator for Remote Sensing of the Atmosphere

“…Also, the RF discharge-pumped slab CO lasers can operate in Q-switching mode emitting short (submicrosecond), high-power (several kilowatts) pulses that is preferable for the remote sensing application. In addition, the short high-power CO laser pulses can be effectively converted to the second harmonic or sum-frequency radiation in ZnGeP 2 nonlinear crystals, 12,17,18 which extends application of such a laser system. A mode-locking regime provides highpower nanosecond pulse generation 17 and should be more attractive for solving those tasks.…”

“…The output emission spectrum of the Q-switched compact slab CO laser can be significantly enriched by the second harmonics and sum-frequency generation in ZnGeP 2 crystal with intracavity frequency conversion scheme. 12 It is the very promising scheme because the nonlinear crystal is located inside the laser cavity, and the simplicity and compactness of the laser system are retained.…”

“…Lebedev Physical Institute. [10][11][12][13] The lasers have slab geometry of the discharge gap, in which the active medium is excited by a capacitive radio frequency (RF) discharge. The advantages of this laser configuration are compactness and absence of highvoltage power supply, which is attractive for outdoor application.…”