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Proceedings Paper

Femtosecond studies of nonlinear optical switching in GaAs waveguides using time-domain interferometry
Author(s): Kristin K. Anderson; Michael J. LaGasse; Hermann A. Haus; James G. Fujimoto
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Paper Abstract

We describe the application of a new femtosecond measurement technique, time division interferometry, for investigating the transient nonlinear index in waveguides. This technique performs an interferometric measurement using a time division multiplexed reference pulse and achieves high sensitivity with increased immunity to acoustic and thermal parasitics. Using a tunable femtosecond laser source, direct measurements of the wavelength dependent nonresonant nonlinear index have been performed in A1GaAs waveguides. In addition, conventional pump and probe absorption measurements permit the investigation of carrier dynamics, band filling, and two photon absorption effects. Two photon absorption is found to be a potentially serious limiting effect for obtaining all optical switching.

Paper Details

Date Published: 1 May 1990
PDF: 11 pages
Proc. SPIE 1216, Nonlinear Optical Materials and Devices for Photonic Switching, (1 May 1990); doi: 10.1117/12.18103
Show Author Affiliations
Kristin K. Anderson, Massachusetts Institute of Technology (United States)
Michael J. LaGasse, Massachusetts Institute of Technology (United States)
Hermann A. Haus, Massachusetts Institute of Technology (United States)
James G. Fujimoto, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1216:
Nonlinear Optical Materials and Devices for Photonic Switching
Nasser Peyghambarian, Editor(s)

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