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A single-frequency doubly resonant optical parametric oscillator is pumped by a master oscillator-fiber power amplifier whose pulse duration is varied for 40 ns to 10 µs, enabling to optimize the pumping parameters.
We report the continuous mode-locked operation of a picosecond, singly-resonant, synchronously-pumped optical parametric oscillator (SPOPO) based on ZGP. The ZGP SPOPO emits in the 4-6 μm range with signal power higher than 800 mW.
Laser specifications for a spaceborne sensitive measurement of CO2, by differential absorption LIDAR (DIAL) at 2.05 mum, have been derived in terms of output energy, frequency stability and beam quality. To achieve such operation, single longitudinal mode (SLM) operation and fine frequency control is needed. In previous work, the authors have developed an optical parametric oscillator based set-up...
Here, we propose to apply to Cr2+:ZnSe an original mode-locking technique, using an intracavity second order nonlinear mirror, and efficiently demonstrated on near-infrared (lambda=1 mum) laser sources. Indeed, efficiency and reliability reached by second order non linear crystals, such as PPLN, allow a transposition of the nonlinear mirror concept from near-infrared to mid-infrared laser sources...
We present a new, low threshold, narrow linewidth, entangled cavity scheme for nanosecond OPO. Thanks to this compact design, open loop single longitudinal mode operation is achieved over hours with 5 MHz short term stability.
We demonstrate 100 GHz continuous tuning and plusmn3 MHz frequency stabilization of the signal radiation delivered by an entangled cavity nanosecond OPO while the frequency fluctuation of the pump radiation is larger than 500 MHz.
This paper reports recent development on a semi-monolithic entangle cavity doubly resonant (ECOPO) pumped by a nanosecond passively Q-switched Nd:YAG laser. The ECOPO consists of a periodically poled lithium niobate crystal and four mirrors. A stable single longitudinal mode output, a fine continuous tuning and a low threshold of oscillation is obtained which is well suited for gas sensing applications.
Entangled cavity optical parametric oscillators are known as powerful devices to fulfill requirements for high resolution spectroscopy. We demonstrate here that output performances can be strongly improved by using a partial pump beam reflection.
The OPO arrangement with intracavity OPA at the idler wavelength is experimentally and theoretically investigated in the context of pulsed devices emitting several mJ. Benefits and drawbacks are discussed versus the conventional singly resonant OPO.
We report on experiments carried out with improved pumping schemes and present modeling for further enhancement of direct 8-12 mum generation by self-DFM in Cr:ZnSe laser slabs using a Tm:YLF 1.9-mum pulsed pump source.
Active mode-locking of a near degenerate (~1064 nm) doubly resonant periodically poled LiNbO3 OPO pumped at 532 nm is reported. Pulse durations as short as 700 ps are observed.
We present what we believe to be the first results on tunable mid-infrared generation obtained in diffusion bonded ZnSe slabs by difference frequency mixing of OPO output waves.
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