Spectral Linewidth of MQW DFB Lasers with Intensity-Modulated TM-Polarized Light Injection

Hiroshi Yasaka, Kazuo Kasaya, Kiyoto Takahata, Mitsuru Naganuma

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The spectral linewidth of a multiple-quantum-well (MQW) distributed feedback (DFB) laser is measured when intensity-modulated orthogonally-polarized (transverse magnetic (TM) mode) light is injected into the laser. The spectral linewidth does not change when the modulation frequency is higher than several hundred megahertz and is almost the same as without light injection. However, it broadens when the injected orthogonally polarized light modulation frequency is close to zero. The line shape of the MQW DFB laser's lasing light becomes non-Lorentzian in shape below a modulation frequency of 500 MHz.

Original languageEnglish
Pages (from-to)679-682
Number of pages4
JournalIEEE Photonics Technology Letters
Volume4
Issue number7
DOIs
Publication statusPublished - 1992 Jul
Externally publishedYes

ASJC Scopus subject areas

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

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