High-power, 474 fs, 31.12 MHz, all-polarization-maintaining, 1560 nm fiber laser system based on the chirped-pulse amplification

Abstract

Abstract We report on a 13.2 W, 474 fs, 31.12 MHz, all-polarization-maintaining (PM), 1560 nm fiber laser system based on the chirped-pulse amplification (CPA). The home-built seed laser with the nonlinear amplified loop mirror (NALM) can deliver two trains of laser pulses. Two stages of cascaded all-PM Er:Yb co-doped fiber (EYDF) amplifiers were employed in scaling up the average power. The corresponding numerical simulation and experimental investigations were implemented in optimizing the power amplification process. To our knowledge, this is the highest output power ever reported for the 1560 nm femtosecond all-PM fiber laser systems.