title: Sub-5-ps optical pulse generation from a 1.55-µm distributed-feedback laser diode with nanosecond electric pulse excitation and spectral filtering.
abstract: This paper reports generation of sub-5-ps Fourier-transform limited optical pulses from a 1.55-µm gain-switched single-mode distributed-feedback laser diode via nanosecond electric excitation and a simple spectral-filtering technique. Typical damped oscillations of the whole lasing spectrum were observed in the time-resolved waveform. Through a spectral-filtering technique, the initial relaxation oscillation pulse and the following components in the output pulse can be well separated, and the initial short pulse can be selectively extracted by filtering out the short-wavelength components in the spectrum. Short pulses generated by this simple method are expected to have wide potential applications comparable to mode-locking lasers.
authors.affiliation: Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. shaoqiangchen@gmail.com
authors.forename: Shaoqiang
authors.initials: S
authors.lastname: Chen
authors.forename: Aya
authors.initials: A
authors.lastname: Sato
authors.forename: Takashi
authors.initials: T
authors.lastname: Ito
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yoshita
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Akiyama
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yokoyama