Short mid-infrared watt-level all-fiber nonlinear pulse compressor above 100-MHz pulse repetition rate

Abstract We firstly report a 2-μm all-fiber nonlinear pulse compressor based on two pieces of normal dispersion fiber (NDF), which enables high-power scaling ability watt-level and high compression ratio 13.7. With the NDF-based compressor, 450-fs laser pulses with repetition rate 101.4 MHz are compressed to 35.1 fs, corresponding 5.2 optical oscillation cycle at wavelength region. The output average power reaches 1.28 W, is believed be highest value never achieved from previous compressors above 100 MHz. dynamic evolution ultrafast inside numerically analyzed, matching well experimental results.