Dynamics of short-pulse generation via spectral filtering from intensely excited gain-switched 1.55-μm distributed-feedback laser diodes

Shaoqiang Chen, Masahiro Yoshita, Aya Sato, Takashi Ito, Hidefumi Akiyama, Hiroyuki Yokoyama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Picosecond-pulse-generation dynamics and pulse-width limiting factors via spectral filtering from intensely pulse-excited gain-switched 1.55-μm distributed-feedback laser diodes were studied. The spectral and temporal characteristics of the spectrally filtered pulses indicated that the short-wavelength component stems from the initial part of the gain-switched main pulse and has a nearly linear down-chirp of 5.2 ps/nm, whereas long-wavelength components include chirped pulse-lasing components and steady-state-lasing components. Rate-equation calculations with a model of linear change in refractive index with carrier density explained the major features of the experimental results. The analysis of the expected pulse widths with optimum spectral widths was also consistent with the experimental data.

Original languageEnglish
Pages (from-to)10597-10605
Number of pages9
JournalOptics Express
Volume21
Issue number9
DOIs
Publication statusPublished - 2013 May 6

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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