A two-stage blue-pumped noncollinearly phase matched optical parametric amplifier was used to generate near-infrared pulses that were continuously tunable from 865 to 1600 nm. The pulse lengths scaled from 20 fs at the shorter wavelengths to below 50 fs at 1600 nm, with a nearly Fourier-transform-limited bandwidth. From 200 μJ of 775-nm pump light at a 1-kHz repetition rate and a 130-fs duration, 7–2.5-μJ pulse energies were generated, corresponding to a typical quantum efficiency of 25% from blue to near-infrared light.
© 2000 Optical Society of America
[Optical Society of America ]
(190.0190) Nonlinear optics : Nonlinear optics
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(320.0320) Ultrafast optics : Ultrafast optics
(320.7080) Ultrafast optics : Ultrafast devices
J. Piel, M. Beutter, and E. Riedle, "20–50-fs pulses tunable across the near infrared from a blue-pumped noncollinear parametric amplifier," Opt. Lett. 25, 180-182 (2000)