Pulse stretching with large mode area fiber Bragg gratingsfor high contrast multipetawatt laser

摘要

We present a fiber stretcher for Chirped Pulse Amplification (CPA) based on Concatenated Chirped Fiber Bragg Gratings (CBFG) on Polarization Maintaining (PM) and Large Mode Area (LMA) fibers. Phase matching with UV-trimming technique allows us to reduce strongly the ripples in the stretched beam.