Picosecond tunable mode locking of a Cr2+:ZnSe laser with a nonlinear mirror.
Identifieur interne : 000449 ( Ncbi/Curation ); précédent : 000448; suivant : 000450Picosecond tunable mode locking of a Cr2+:ZnSe laser with a nonlinear mirror.
Auteurs : Jean-Baptiste Dherbecourt [France] ; Adrien Denoeud ; Jean-Michel Melkonian ; Myriam Raybaut ; Antoine Godard ; Michel Lefebvre ; Emmanuel RosencherSource :
- Optics letters [ 1539-4794 ] ; 2011.
Abstract
We report on a nonlinear mirror (NLM) scheme that enables, for the first time to the best of our best knowledge, tunable mode locking of a Cr2+:ZnSe laser in the picosecond regime. The NLM-used as the output coupler of the laser cavity-consists of a periodically poled lithium niobate (PPLN) crystal with a fan-out grating coupled with a dichroic mirror and a wedged dispersive YAG plate. The Cr2+:ZnSe laser, pumped by a CW thulium-doped fiber laser, delivers 85 ps pulses at a repetition rate of 220 MHz with a 300 mW average power. Thanks to the use of a fan-out PPLN crystal, we benefit from the wide tunability of the Cr2+:ZnSe laser and achieve mode locking over the whole 2.44-2.55 μm range while maintaining a narrow-linewidth emission suitable for time-resolved nonlinear spectroscopy applications.
PubMed: 21368971
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<front><div type="abstract" xml:lang="en">We report on a nonlinear mirror (NLM) scheme that enables, for the first time to the best of our best knowledge, tunable mode locking of a Cr2+:ZnSe laser in the picosecond regime. The NLM-used as the output coupler of the laser cavity-consists of a periodically poled lithium niobate (PPLN) crystal with a fan-out grating coupled with a dichroic mirror and a wedged dispersive YAG plate. The Cr2+:ZnSe laser, pumped by a CW thulium-doped fiber laser, delivers 85 ps pulses at a repetition rate of 220 MHz with a 300 mW average power. Thanks to the use of a fan-out PPLN crystal, we benefit from the wide tunability of the Cr2+:ZnSe laser and achieve mode locking over the whole 2.44-2.55 μm range while maintaining a narrow-linewidth emission suitable for time-resolved nonlinear spectroscopy applications.</div>
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