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Opt Lett. 2010 Jul 1;35(13):2197-9. doi: 10.1364/OL.35.002197.

Picosecond synchronously pumped ZnGeP2 optical parametric oscillator.

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  • 1ONERA the French Aerospace Lab, Chemin de la Hunière 91761 Palaiseau, France. jean-baptiste.dherbecourt@onera.fr


We report on the experimental operation of a picosecond, singly resonant, synchronously pumped optical parametric oscillator (SPOPO) based on a ZnGeP(2) (ZGP) crystal. The ZGP SPOPO is pumped with the idler radiation from a diffraction-grating-tuned periodically poled lithium niobate SPOPO emitting a continuous picosecond pulse train (Delta tau approximately 8 ps, f=76 MHz). The noncritically 90 degree phase-matched ZGP SPOPO is tuned in the 3.8-5.6 microm range by tuning the pump wavelength (2.25-2.5 microm). As high as approximately 800 mW of average power is emitted at 4 microm.

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