Spectral Shaping and Continuous Tuning of Multi-color Carrier-Envelope Phase Locked Pulse

Abstract

We have proposed and demonstrated two schemes to generate multi-color CEP-locked beams by using the NOPA. In the first scheme, a spatial filter in the spectrally dispersed seed light made the seed spectrum have three peaks, and the generated idler beam also had three peaks. The spectrum of the CEP-locked pulse can be shaped into arbitral spectral shape. In the second scheme, parabolic chirp was introduced on the seed pulse to generate two-color CEP-locked pulse whose colors are tunable.