title: Self-similar evolution in a short fiber amplifier through nonlinear pulse preshaping.
abstract: We report on a nonlinear preshaper that optimizes initial pulses for self-similar evolution in a next fiber amplifier. It consists of a pair of gratings and a segment of single-mode fiber (SMF). The grating pair provides negative chirp to make the pulses preshaped temporally and spectrally in the SMF. With this optimization, the self-similar amplification can be realized in a 2.2 m Yb-doped fiber in a large range of pump power. After amplification, the pulse can be dechirped to transform-limited pulses with ~60 fs pulse duration.
authors: Ultrafast Laser Laboratory, College of Precision Instruments and Opto-electronics Engineering, Key Laboratory of Opto-electronics Information Technology (Ministry of Education), Tianjin University, Tianjin, China.
authors: Sijia
authors: S
authors: Wang
authors: Bowen
authors: B
authors: Liu
authors: Chenglin
authors: C
authors: Gu
authors: Youjian
authors: Y
authors: Song
authors: Cheng
authors: C
authors: Qian
authors: Minglie
authors: M
authors: Hu
authors: Lu
authors: L
authors: Chai
authors: Chingyue
authors: C
authors: Wang