1.3-μm wavelength-tunable quantum-dot optical frequency comb generator integrated with absorptive optical attenuator

Naokatsu Yamamoto, Kouichi Akahane, Tetsuya Kawanishi, Redouane Katouf, Hideyuki Sotobayashi, Yuki Yoshioka, Hiroshi Takai

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The generation of multiple-wavelength fine peaks in the 1.3-μm waveband with wavelength tunability and powercontrollability is successfully demonstrated using a quantum-dot optical frequency comb laser (QD-CML) integrated with an absorptive optical attenuator by employing a broadband optical injection seeding technique. High-quality, high-density InAs/InGaAs QD optical gain media are fabricated on a GaAs substrate using a sandwiched sub-nano separator (SSNS) growth technique. A wide wavelength tuning range between 1.274 and 1.302 μm was achieved at a low gain current of 50 mA. In addition, a high extinction ratio of -20 dB at a low attenuator voltage (-2.5 V) was achieved in the fabricated QD-CML.

Original languageEnglish
Pages (from-to)282-285
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume9
Issue number2
DOIs
Publication statusPublished - 2012 Feb
Externally publishedYes

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Keywords

  • Broadband optical gain
  • Infrared light source
  • Laser
  • Nanostructure
  • Quantum dot

ASJC Scopus subject areas

  • Condensed Matter Physics

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