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4 March 2019 Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses
Gabriel Amiard Hudebine, Eric Freysz
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Proceedings Volume 10902, Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII; 109020M (2019) https://doi.org/10.1117/12.2505870
Event: SPIE LASE, 2019, San Francisco, California, United States
Abstract
Chirp of the pulses generated in the 1.4 μm-1.8 μm spectral ranges and in a singly resonant OPO build around a 3 mm long PPLN crystal pumped at 108 MHz by 40 nJ, 1 ps chirped or 350 fs weakly chirped pump pulses centered at 1035 nm is analyzed. Whatever the chirp of the pump pulses, we achieved a pump to signal conversion efficiency < 30%. We demonstrate that by adjusting the cavity length around synchronism condition, chirped or almost chirped free (down to 80 fs) signal pulses are generated. A simple mechanism accounts for this phenomenon.
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Gabriel Amiard Hudebine and Eric Freysz "Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses", Proc. SPIE 10902, Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII, 109020M (4 March 2019); https://doi.org/10.1117/12.2505870
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KEYWORDS
Optical parametric oscillators
Picosecond phenomena
Femtosecond phenomena
Ytterbium
Fiber lasers
Nonlinear crystals
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