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We propose to use Bragg grating to induce large walk-off between the signal and slow pump in nonlinear crystal for developing passively mode-locked OPOpsilas in which a CW pump is efficiently converted into short pulses.
Optical parametric oscillators using volume Bragg gratings as cavity mirrors provide narrow bandwidth signals. The longitudinal mode spectrum of a 1.06 mum pumped degenerate OPO is measured with Fabry-Perot etalon and compared to simulations.
150-ps-FWHM, 12-mJ pulses have been generated in a diode-pumped regenerative amplifier (DPRA) after differentiating a 3-ns-FWHM, SBS-steepened seeding pulse using a tunable Bragg grating filter as the DPRA resonator spectrally selective mirror.
A method for fundamentally improving the temporal contrast of optical parametric chirped-pulse amplification (OPCPA) systems by using a volume Bragg grating to regeneratively filter the OPCPA pump spectrum is demonstrated for the first time.
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