title: Efficient femtosecond green-light source with a diode-pumped mode-locked Yb3+:KY(WO4)2 laser.
abstract: Efficient generation of femtosecond pulses at 524 nm is demonstrated by the extracavity frequency doubling of the output of a diode-pumped femtosecond Yb3+:KY(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.
authors.affiliation: The Ultrafast Photonics Collaboration, J. F. Allen Physics Research Laboratories, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, Scotland, UK. aal2@st-andrews.ac.uk
authors.forename: A A
authors.initials: AA
authors.lastname: Lagatsky
authors.forename: E U
authors.initials: EU
authors.lastname: Rafailov
authors.forename: A R
authors.initials: AR
authors.lastname: Sarmani
authors.forename: C T A
authors.initials: CT
authors.lastname: Brown
authors.forename: W
authors.initials: W
authors.lastname: Sibbett
authors.forename: L
authors.initials: L
authors.lastname: Ming
authors.forename: P G R
authors.initials: PG
authors.lastname: Smith