522 W, Spectrally Beam Combined Fiber Laser with Near-Diffraction Limited Beam Quality

摘要

We describe a three-channel, spectrally beam combined (SBC), 1-μm fiber laser that features a SBC power combining efficiency of 93%, versatile master-oscillator, power-amplifier (MOPA) fiber channels with up to 260 W of narrowband, polarized, and near-diffraction limited output, and currently produces 522 W of average power with a dispersed (non-dispersed) beam quality at 522 W of 1.18× (1.22×) diffraction limited. To our knowledge, these results represent the best combination of output power and beam quality achieved by SBC to date.