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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.
We investigate spectral shaping of the parametric gain in a double-pass doubly resonant OPO. The experimental demonstration is made possible by our specific OPO design that enables the precise control of the backward relative phase.
We numerically investigate the use of a PPLN nonlinear mirror to achieve pulsed operation of a Cr2+:ZnSe laser. We discuss the effect of various parameters on the laser dynamics (CW, Q-switched and/or mode-locked operation).
We report on experimental investigation and modelling of thermal effects in high-power pulsed OPOs. A significant improvement of the conversion efficiency is demonstrated when a proper temperature gradient is applied to the nonlinear crystal.
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.
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.
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