Measurements of optical loss in GaAs/A1(2)O(3) nonlinear waveguides in the infrared using femtosecond scattering technique

S V Rao, K Moutzouris, M Ebrahimzadeh, A De Rossi, G Gintz, M Calligaro, V Ortiz, V Berger

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We report measurements of optical loss in GaAs/Al2O3 nonlinear waveguides over the spectral range 1.3-2.1 mum in the infrared using a scattering technique. The optical source was a tunable femtosecond optical parametric oscillator (OPO) generating output pulses with durations of 200-250 fs at a repetition rate of similar to90 MHz and an average power of similar to50 mW. Loss coefficients of similar to1.15-2.55 cm(-1), corresponding to losses of similar to5-11 dB/cm were obtained from the measured data. The loss decreases with increasing wavelength due to the Rayleigh scattering contribution. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)223-228
Number of pages6
JournalOptics Communications
Volume213
Issue number4-6
DOIs
Publication statusPublished - 1 Dec 2002

Keywords

  • optical loss
  • scattering technique
  • semiconductor waveguide
  • two-photon absorption
  • nonlinear frequency conversion
  • GUIDE LOSS-MEASUREMENT
  • WELL WAVE-GUIDES
  • REFRACTIVE-INDEX
  • BAND-GAP
  • GAAS
  • ABSORPTION
  • GENERATION
  • ALGAAS
  • HALF

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