title: Flexible generation of coherent rectangular pulse from an ultrafast fiber laser based on dispersive Fourier transformation technique.
abstract: We propose a new solution to flexibly generate the coherent rectangular pulse from an ultrafast fiber laser based on the dispersive Fourier transformation (DFT) technique. The rectangular dissipative soliton (DS) spectra emitted from a net-normal dispersion mode-locked fiber laser is mapped into a time-domain coherent rectangular waveform through the DFT technique. The rectangular pulse can be broadened flexibly with the adjustments of the pump power. The coherence and shot-to-shot fluctuations of the achieved rectangular pulses are further verified by the Mach-Zehnder interference experiment and the recorded single-shot pulse train, respectively. The results demonstrate that the combination of DS mode-locked laser and DFT technique might be indeed an effective and flexible way to achieve highly coherent rectangular pulses.
authors.forename: Fu-Zao
authors.initials: FZ
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Huang
authors.forename: Meng
authors.initials: M
authors.lastname: Liu
authors.forename: Ai-Ping
authors.initials: AP
authors.lastname: Luo
authors.forename: Zhi-Chao
authors.initials: ZC
authors.lastname: Luo
authors.forename: Wen-Cheng
authors.initials: WC
authors.lastname: Xu