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We report a systematic study of thermal effects in high-power single-pass SHG in the presence of absorption, and propose an optimum heating configuration for the crystal to minimize thermal lensing at various fundamental power levels.
Efficient generation of tunable femtosecond pulses in the visible by internal frequency doubling of an optical parametric oscillator (OPO) based on 1-mm-thick periodically-poled LiNbO3 (PPLN) is reported. Synchronously pumped by a Kerr-lens-mode-locked Ti:sapphire laser at 76 MHz at 810 nm, infrared femtosecond signal pulses across 1330-1570 nm are generated by the OPO. A 1-mm-thick crystal of BiB...
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