Characterization of Wavelength-Tunable Quantum Dot External Cavity Laser for 1.3-μm-Waveband Coherent Light Sources

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概要

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• 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 \times 10^{10}/cm2 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 ({\sim}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.

• 2012-02-25

著者

• TAKAI Hiroshi

  Tokyo Denki University

• Akahane Kouichi

  National Inst. Information And Communications Technol. (nict) Tokyo Jpn

• Yamamoto Naokatsu

  National Inst. Information And Communications Technol. (nict) Tokyo Jpn

• Kawanishi Tetsuya

  National Inst. Of Information And Technol. (nict) Tokyo Jpn

• Sotobayashi Hideyuki

  Aoyama Gakuin University, Sagamihara 229-8558, Japan

• Yoshioka Yuki

  Tokyo Denki University, Chiyoda, Tokyo 101-8457, Japan

• Kawanishi Tetsuya

  National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan

• YOSHIOKA Yuki

  Tokyo Denki University

• SOTOBAYASHI Hideyuki

  Aoyama Gakuin University

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