A high-repetition-rate Ti:sapphire-pumped femtosecond optical parametr
ic oscillator based on the new nonlinear-optical crystal RbTiOAsO4 is
described. Tuning from 1.03 to 1.3 mu m in the signal branch and from
2.15 to 3.65 mu m in the idler branch with powers as high as 250 mW in
the signal and 200 mW in the idler is presented. The possibility of e
xtending the tuning range beyond 3.65 mu m is discussed.