Tunable and chirp free femtosecond signal pulses generated by a PPLN OPO pumped by Ytterbium fiber laser chirped pulses
Language
en
Communication dans un congrès avec actes
This item was published in
Nonlinear Frequency Generation and Conversion: Materials and Devices, Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII, 2019-02-02, San Francisco. p. 21
SPIE
English 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 ...Read more >
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.Read less <
English Keywords
Optical parametric oscillators
Parametric generation
Parametric amplification
Three-waves mixing
Femtoseconde pulse
Chirped pulse
Ytterbium fiber laser
PPLN crystal
Origin
Hal imported