Gain and noise saturation of wide-band InAs-InP quantum dash optical amplifiers: Model and experiments

D. Hadass, A. Bilenca, R. Alizon, H. Dery, V. Mikhelashvili, G. Eisenstein, R. Schwertberger, A. Somers, J. P. Reithmaier, A. Forchel, M. Calligaro, S. Bansropun, M. Krakowski

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


We present a theoretical model for gain and noise saturation in quantum dash (QDash) semiconductor optical amplifiers. The model is based on the density matrix formalism and addresses static saturation spectra. The calculations are confirmed by a series of experiments which highlight the unique properties of these amplifiers. We demonstrate a high gain, a wide bandwidth, and high saturation power. The saturation spectrum is shown to be asymmetric, emphasizing saturation at short wavelength. The asymmetry stems from the high energy tail of the density of state function in those quantum wire (QWire) like gain media as well as from the interactions with the wetting layer.

Original languageEnglish
Pages (from-to)1015-1026
Number of pages12
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number5
StatePublished - 1 Sep 2005
Externally publishedYes


  • Density matrix formalism
  • Density of state function
  • Gain saturation
  • InAs-InP quantum dash optical amplifiers
  • Noise saturation
  • Quantum wirelike gain media
  • Saturation spectrum
  • Static saturation spectra
  • Wide-band optical amplifiers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Gain and noise saturation of wide-band InAs-InP quantum dash optical amplifiers: Model and experiments'. Together they form a unique fingerprint.

Cite this