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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 10597–10605

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, and Hiroyuki Yokoyama  »View Author Affiliations

Optics Express, Vol. 21, Issue 9, pp. 10597-10605 (2013)

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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.

© 2013 OSA

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.5960) Lasers and laser optics : Semiconductor lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.1590) Ultrafast optics : Chirping
(320.5550) Ultrafast optics : Pulses

ToC Category:
Lasers and Laser Optics

Original Manuscript: December 19, 2012
Revised Manuscript: February 23, 2013
Manuscript Accepted: April 18, 2013
Published: April 23, 2013

Shaoqiang Chen, Masahiro Yoshita, Aya Sato, Takashi Ito, Hidefumi Akiyama, and Hiroyuki Yokoyama, "Dynamics of short-pulse generation via spectral filtering from intensely excited gain-switched 1.55-μm distributed-feedback laser diodes," Opt. Express 21, 10597-10605 (2013)

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