Efficient femtosecond green-light source with a diode-pumped mode-locked Yb3+:KY(WO4)2 laser.
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.
Lagatsky
A A
AA
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
Rafailov
E U
EU
Sarmani
A R
AR
Brown
C T A
CT
Sibbett
W
W
Ming
L
L
Smith
P G R
PG