By Topic

Influence of scattering and two-photon absorption on the optical loss in GaAs-Al2O3 nonlinear waveguides measured using femtosecond pulses

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

8 Author(s)
Soma Venugopal Rao ; Sch. of Phys. & Astron., Univ. of St. Andrews, Fife, UK ; Moutzouris, K. ; Ebrahimzadeh, M. ; De Rossi, A.
more authors

The influence of scattering and two-photon absorption on the optical loss in GaAs-Al2O3 semiconductor nonlinear waveguides has been studied using femtosecond pulses. By deploying a scattering technique, loss coefficients were evaluated over an extended wavelength range of 1.3-2.1 μm in the near-infrared. A systematic study involving intensity and wavelength dependence of the loss revealed the presence of two-photon absorption for wavelengths below 1.6 μm. A simple nonlinear transmission study enabled the separation of the two-photon absorption coefficient from scattering and linear absorption. The calculated two-photon absorption coefficients were ∼9-20 cm/GW.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 3 )