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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 11 — Nov. 1, 2010
  • pp: 2211–2217

Enhancement of gain recovery rate and cross-gain modulation bandwidth using a two-electrode quantum-dot semiconductor optical amplifier

Yu Yi, Huang Lirong, Xiong Meng, Tian Peng, and Huang Dexiu  »View Author Affiliations


JOSA B, Vol. 27, Issue 11, pp. 2211-2217 (2010)
http://dx.doi.org/10.1364/JOSAB.27.002211


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Abstract

A two-electrode quantum-dot semiconductor optical amplifier (QD-SOA) is proposed to enhance gain recovery rate and cross-gain modulation (XGM) bandwidth. In the theoretical model, electron and hole dynamics as well as the carrier diffusion are accounted for in the quantum-dot rate equations, which are solved with forward and backward propagation equations of signal and amplified spontaneous emission. The simulation results show that two-electrode QD-SOA can distribute injection current density nonuniformly to maintain carriers in carrier reservoirs of quantum dot sufficient along the entire cavity length of the semiconductor optical amplifier, thus making gain saturation dynamics dominated by spectral hole burning at lower bias current than common QD-SOA. Besides, distributing more current density in the second section of the two-electrode QD-SOA at higher bias can greatly accelerate gain recovery as well as expand the XGM bandwidth.

© 2010 Optical Society of America

OCIS Codes
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Optoelectronics

History
Original Manuscript: June 30, 2010
Revised Manuscript: August 29, 2010
Manuscript Accepted: August 31, 2010
Published: October 8, 2010

Citation
Yu Yi, Huang Lirong, Xiong Meng, Tian Peng, and Huang Dexiu, "Enhancement of gain recovery rate and cross-gain modulation bandwidth using a two-electrode quantum-dot semiconductor optical amplifier," J. Opt. Soc. Am. B 27, 2211-2217 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-11-2211

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