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Proceedings Article

Quantum-dot semiconductor optical amplifiers

[+] Author Affiliations
Mitsuru Sugawara, N. Hatori, Hiroji Ebe

Fujitsu Labs. Ltd. (Japan)

T. Akiyama, Yoshiaki Nakata, K. Otsubo

Fujitsu Labs. Ltd. and Fujitsu (Japan)

Proc. SPIE 4905, Materials and Devices for Optical and Wireless Communications, 259 (August 30, 2002); doi:10.1117/12.481011
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From Conference Volume 4905

  • Materials and Devices for Optical and Wireless Communications
  • Constance J. Chang-Hasnain; YuXing Xia; Kenichi Iga
  • Shanghai, China | October 14, 2002

abstract

This paper provides prospects and current status of quantum-dot semiconductor optical amplifiers (SOAs) and their comparison with bulk and quantum-well technology, based on our pioneering work covering the proposal of their promising features, subsequent experimental demonstrations, and the design of all-optical quantum-dot switching modules. The proposed promising features are diverse; high-saturation power, high-speed amplification up to 160 Gb/s under gain saturation without pattern effect, high-speed cross-gain modulation up to 160 Gb/s without pattern effect, multiple-wavelength processing over broad gain spectra, and symmetric wavelength conversion by four-wave mixing. The operation theory of quantum-dot SOAs is provided in order to treat various aspects unique to quantum dots such as spatial localization, retarded carrier relaxation, and inhomogeneous and homogeneous broadening. Pattern-effect-free amplification at 10-40Gb/s, wavelength conversion by the cross-gain modulation at 10-40Gb/s, and symmetric wavelength conversion by four-wave mixing are experimentally demonstrated in 1.3-micron InGaAs/GaAs quantum-dot SOAs. All-optical quantum-dot switching modules are proposed, which we expect to work in the next-generation flexible all-optical photonic networks.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Mitsuru Sugawara ; T. Akiyama ; N. Hatori ; Yoshiaki Nakata ; K. Otsubo, et al.
"Quantum-dot semiconductor optical amplifiers", Proc. SPIE 4905, Materials and Devices for Optical and Wireless Communications, 259 (August 30, 2002); doi:10.1117/12.481011; http://dx.doi.org/10.1117/12.481011


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