Broadband, picosecond two-stage optical parametrical chirped pulse amplification system at 100 Hz BROADBAND, PICOSECOND TWO-STAGE OPTICAL ... MARIO GALLETTI et al.

Abstract

We report on a broadband, picosecond two-stage optical parametrical chirped pulse amplification system, pumped at 515 nm by a frequency doubled Yb regenerative amplifier. The system, designed to be part of the new petawatt picosecond front end, delivers 30 μJ pulses at a central wavelength of 870 nm with about 200 nm bandwidth at 100 Hz. The overall efficiency of the system (pump signal) is 8% while the second stage presents ∼17% conversion efficiency.