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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 1 — Jan. 7, 2008
  • pp: 170–178

Slow and fast dynamics of gain and phase in a quantum dot semiconductor optical amplifier

T. Vallaitis, C. Koos, R. Bonk, W. Freude, M. Laemmlin, C. Meuer, D. Bimberg, and J. Leuthold  »View Author Affiliations

Optics Express, Vol. 16, Issue 1, pp. 170-178 (2008)

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Gain and phase dynamics in InAs/GaAs quantum dot semiconductor optical amplifiers are investigated. It is shown that gain recovery is dominated by fast processes, whereas phase recovery is dominated by slow processes. Relative strengths and time constants of the underlying processes are measured. We find that operation at high bias currents optimizes the performance for nonlinear cross-gain signal processing if a low chirp is required.

© 2008 Optical Society of America

OCIS Codes
(250.5980) Optoelectronics : Semiconductor optical amplifiers
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(320.5390) Ultrafast optics : Picosecond phenomena
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:

Original Manuscript: October 22, 2007
Revised Manuscript: December 12, 2007
Manuscript Accepted: December 16, 2007
Published: January 2, 2008

T. Vallaitis, C. Koos, R. Bonk, W. Freude, M. Laemmlin, C. Meuer, D. Bimberg, and J. Leuthold, "Slow and fast dynamics of gain and phase in a quantum dot semiconductor optical amplifier," Opt. Express 16, 170-178 (2008)

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  1. D.  Bimberg, G.  Fiol, M.  Kuntz, C.  Meuer, M.  Laemmlin, N. N. Ledentsov, and A. R.  Kovsh, "High speed nanophotonic devices based on quantum dots," Phys. Status Solidi A 203, 3523-3532 (2006). [CrossRef]
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  8. M. van der Poel, J. Mork, A. Somers, A. Forchel, J. P. Reithmaier, and G. Eisenstein, "Ultrafast gain and index dynamics of quantum dash structures emitting at 1.55µm," Appl. Phys. Lett. 89, 081102 (2006). [CrossRef]
  9. K. L.  Hall, G.  Lenz, A. M.  Darwish, and E. P.  Ippen, "Subpicosecond gain and index nonlinearities in InGaAsP diode lasers," Opt. Commun. 111, 589-612 (1994). [CrossRef]
  10. A. V.  Uskov, E. P.  O’Reilly, M.  Laemmlin, N. N.  Ledentsov, and D.  Bimberg, "On gain saturation in quantum dot semiconductor optical amplifiers," Opt. Commun 248, 211-219 (2005). [CrossRef]
  11. A. Uskov, E. O’Reilly, R. Manning, R. Webb, D. Cotter, M. Laemmlin, N. Ledentsov, and D. Bimberg, "On ultrafast optical switching based on quantum-dot semiconductor optical amplifiers in nonlinear Interferometers," IEEE Photonics Technol. Lett. 16, 1265-1267 (2004). [CrossRef]
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