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The optimal conditions of low-threshold collinear parametric Raman-comb generation in calcite from the 477-nm second anti-Stokes to 692-nm fourth Stokes component under 20-ps laser excitation at 532-nm are demonstrated in good agreement with theoretical model.
We report a high-energy picosecond optical-parametric-generator tunable over 6153–6732 nm in the mid-infrared, 1264–1286 nm in near-infrared, providing ∼600 μJ of output energy over entire signal-tuning-range, >25μJ of idler energy over 55% of the idler-tuning-range.
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