Characterization of wavelength-tunable quantum dot external cavity laser for 1.3-μm-waveband coherent light sources

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

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A sandwiched sub-nano separator (SSNS) growth technique of producing high-density, high-quality InAs/InGaAs quantum dot (QD) structures on GaAs substrates is proposed. The SSNS technique achieved a density of 8:2×10 10/cm 2 by suppressing giant dot formation. The QD structures fabricated by the SSNS technique were used to form a ridge-type waveguide QD optical gain chip for O-band optical gain. With this chip, we successfully demonstrated the generation of a wavelength-tunable fine-tooth optical frequency comb in the O-band from a QD optical frequency comb laser (QD-CML), and synchronized short-optical-pulse generation (∼14 ps) with gigahertz-order repetition from a hybrid mode-locked QD-CML. We also successfully demonstrated a wavelength tunable QD-ECL with a wide wavelength tuning range (1265-1320 nm) and a narrow linewidth (210 kHz) in the O-band. It is expected that these QD coherent light sources will become attractive photonic devices for many scientific applications in the 1.0-1.3 μm waveband.

Original languageEnglish
Article number02BG08
JournalJapanese Journal of Applied Physics
Volume51
Issue number2 PART 2
DOIs
Publication statusPublished - 2012 Feb
Externally publishedYes

Fingerprint

Laser resonators
coherent light
laser cavities
Semiconductor quantum dots
Light sources
light sources
quantum dots
Wavelength
wavelengths
separators
Separators
Emitter coupled logic circuits
Optical gain
chips
Photonic devices
teeth
Laser modes
Linewidth
ridges
Laser pulses

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Characterization of wavelength-tunable quantum dot external cavity laser for 1.3-μm-waveband coherent light sources. / Yamamoto, Naokatsu; Akahane, Kouichi; Kawanishi, Tetsuya; Sotobayashi, Hideyuki; Yoshioka, Yuki; Takai, Hiroshi.

In: Japanese Journal of Applied Physics, Vol. 51, No. 2 PART 2, 02BG08, 02.2012.

Research output: Contribution to journalArticle

Yamamoto, Naokatsu ; Akahane, Kouichi ; Kawanishi, Tetsuya ; Sotobayashi, Hideyuki ; Yoshioka, Yuki ; Takai, Hiroshi. / Characterization of wavelength-tunable quantum dot external cavity laser for 1.3-μm-waveband coherent light sources. In: Japanese Journal of Applied Physics. 2012 ; Vol. 51, No. 2 PART 2.
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