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1 Watt femtosecond mid-IR Cr:ZnS laser

Sorokin, Evgeni; Tolstik, Nikolai; Sorokina, Irina T
Journal article, Peer reviewed
Published version
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URI
http://hdl.handle.net/11250/2463333
Date
2013
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  • Publikasjoner fra CRIStin - NTNU [21000]
Original version
Proceedings of SPIE, the International Society for Optical Engineering. 2013, 8599 859916-1-859916-7.   10.1117/12.2003877
Abstract
A room-temperature Kerr-Lens modelocked (KLM) Cr:ZnS laser generates <70 fs pulses duration (about eight optical cycles) with 5.6 nJ pulse energy and over 100 nm FWHM spectral width at 105-157 MHz repetition rates. The laser produces 1 W average output power at 20% optical efficiency, limited by the available Er:fiber pump. For further pulse energy scaling we also realized the chirped-pulse regime, with 0.8-2 ps pulse durations. The demonstrated applications of such mid-IR source range from extra- and intra-cavity spectroscopy to subharmonic OPO pumping. For environmentally-protected delivery we suggest and realize duration-preserving soliton delivery in a ZBLAN fiber. Further bandwidth increase is demonstrated by 2.0-2.8 μm supercontinuum generation in a chalcogenide fiber.
Publisher
Society of Photo-optical Instrumentation Engineers (SPIE)
Journal
Proceedings of SPIE, the International Society for Optical Engineering

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