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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6215–6224

Gain recovery in a quantum dot semiconductor optical amplifier and corresponding pattern effects in amplified optical signals at 1.5 μm

J. Park, Y. D. Jang, J. S. Baek, N. J. Kim, K. J. Yee, H. Lee, D. Lee, S. H. Pyun, W. G. Jeong, and J. Kim  »View Author Affiliations


Optics Express, Vol. 20, Issue 6, pp. 6215-6224 (2012)
http://dx.doi.org/10.1364/OE.20.006215


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Abstract

Fast gain recovery observed in quantum-dot semiconductor-optical-amplifiers (QDSOAs) is useful for amplifying high-speed optical signals. The small but finite slow recovery component can deteriorate the signal amplification due to the accumulation of gain saturation during 10 Gb/s operation. A study of the gain recoveries and pattern effects in signals amplified using a 1.5 μm InAs/InGaAsP QDSOA reveals that the gain recovery is always fast, and pattern-effect-free amplification is observed at the ground state. However, at the excited state, the slow component increases with the current, and significant pattern effects are observed. Simulations of the pattern effects agreed with the observed experimental trends.

© 2012 OSA

OCIS Codes
(160.4760) Materials : Optical properties
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(300.6530) Spectroscopy : Spectroscopy, ultrafast

ToC Category:
Optoelectronics

History
Original Manuscript: November 23, 2011
Revised Manuscript: February 24, 2012
Manuscript Accepted: February 27, 2012
Published: March 2, 2012

Citation
J. Park, Y. D. Jang, J. S. Baek, N. J. Kim, K. J. Yee, H. Lee, D. Lee, S. H. Pyun, W. G. Jeong, and J. Kim, "Gain recovery in a quantum dot semiconductor optical amplifier and corresponding pattern effects in amplified optical signals at 1.5 μm," Opt. Express 20, 6215-6224 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-6-6215


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References

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