Automatic time delay optimization between the pump and seed pulses of a broadly tunable femtosecond optical parametric amplifier.
We propose a scheme for optimizing the time delay between the pump and seed pulses of an optical parametric amplifier (OPA) over a large spectral range. The efficiency of this method is demonstrated for a femtosecond BBO parametric amplifier seeded with a white-light continuum pulse. The error signal used for intensity stabilization results from a modulation of the temporal delay between the pump and the continuum pulses and phase-sensitive detection of the amplified signal. It allows us to lock the delay to the position that maximizes the OPA gain.
Freysz
E
E
Plantard
J
J
Gillet
R
R
Rassoul
R M
RM
Grelu
P
P
Ducasse
A
A