Broadly tunable femtosecond near- and mid-IR source by direct pumping of an OPA with a 41.7 MHz Yb:KGW oscillator

Krauth, JoachimSteinmann, AndyHegenbarth, RobinConforti, MatteoGiessen, Harald2014-12-112016-03-312014-12-112016-03-312013422890855http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-96814http://elib.uni-stuttgart.de/handle/11682/8294http://dx.doi.org/10.18419/opus-8277We generate over half a watt of tunable near-IR (1380-1830 nm) and several hundred milliwatts in the mid-IR (2.4-4.2 µm) as well as milliwatt level mid-IR (4.85-9.33 µm) femtosecond radiation by pumping an optical parametric amplifier directly with a 7.4 W Yb:KGW oscillator at 41.7 MHz repetition rate. We use 5 mm PPLN and 2 mm GaSe as downconversion crystals and seed this process by a supercontinuum from a tapered fiber. The system is extremely simple and very stable and could replace more complex OPOs as tunable light sources.eninfo:eu-repo/semantics/openAccessNichtlineare Optik530Optisch parametrischer VerstärkerParametric oscillators and amplifiers , Nonlinear opticsBroadly tunable femtosecond near- and mid-IR source by direct pumping of an OPA with a 41.7 MHz Yb:KGW oscillatorarticle