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Efficient femtosecond green-light source with a diode-pumped mode-locked Yb3+:KY(WO4)2 laser

A.A.Lagatsky, E.U.Rafailov, A.R.Sarmani, C.T.A.Brown, W.Sibbett, L.Ming*, P.G.R.Smith*

University of St Andrews, School of Physics & Astronomy, J.F.Allen Physics Research Labs, Ultrafast Photon Collaboration, St Andrews, Fife KY16 9SS Scotland
* Optoelectronics Research Centre, University of Southampton, UK


Efficient generation of femtosecond pulses at 524 nm is demonstrated by the extracavity frequency doubling of the output of a diode-pumped femtosecond Yb3+: K-Y(WO4)2 laser using a periodically poled LiTaO3 crystal. An average second-harmonic power of 120 mW is produced at an internal conversion efficiency of 40%. The temporal characteristics of the frequency-doubled pulses as a function of focusing conditions in a thick nonlinear crystal are investigated experimentally, and pulses as short as 225 fs are generated at a pulse repetition frequency of 86 MHz.

Optics Letters (2005) Vol.30(10) pp.1144-1146

doi: 10.1364/OL.30.001144

Southampton ePrint id: 30196


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Copyright University of Southampton 2006