Femtosecond Laser Pulse Compressor Based on Multi-Level Reflection Gratings

Tunable all-normal-dispersion femtosecond Yb:fiber laser with biased nonlinear amplifying loop mirror

“…When the incident angle of the grating is 31°and the two gratings are parallel to each other, the output power reflected through HR 1 reaches a relative maximum of 39 mW from 49 mW of collimator 1. Figure 5(b) gives the autocorrelation trace of the dechirped pulse at a distance between the gratings of 35 mm, and the pulse duration is 178 fs by assuming sech 2 pulse profile, which is close to the responding Fourier-limited duration 92.7 fs 41) and the TBP of it is 0.60.…”