A λ/4-shifted distributed-feedback laser diode with a fiber ring cavity configuration having an OSNR of 85 dB and a linewidth of 7 kHz

Ho Thi Quynhanh, Akihito Suzuki, Masato Yoshida, Toshihiko Hirooka, Masataka Nakazawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We newly propose a λ/4-shifted distributed-feedback laser diode (DFB-LD) that employs a fiber ring cavity configuration and which incorporates an ultranarrow band fiber Bragg grating (FBG) in the cavity. By controlling the FBG wavelength to match the oscillation wavelength of the DFB-LD, we achieved stable single-mode oscillation where the sidemodes of the DFB-LD and the Fabry-Perot modes induced by the ring configuration were sufficiently suppressed. Large performance improvements with an optical signal-to-noise ratio of 85 dB and a linewidth of 7 kHz were obtained.

Original languageEnglish
Pages (from-to)1578-1580
Number of pages3
JournalIEEE Photonics Technology Letters
Volume20
Issue number18
DOIs
Publication statusPublished - 2008 Sep 15

Keywords

  • Fiber Bragg grating (FBG)
  • Fiber ring laser
  • λ/4-shifted distributed-feedback laser diode (DFB-LD)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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