1 May 1990 Femtosecond studies of nonlinear optical switching in GaAs waveguides using time-domain interferometry
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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.
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Kristin K. Anderson, Kristin K. Anderson, Michael J. LaGasse, Michael J. LaGasse, Hermann A. Haus, Hermann A. Haus, James G. Fujimoto, James G. Fujimoto, } "Femtosecond studies of nonlinear optical switching in GaAs waveguides using time-domain interferometry", Proc. SPIE 1216, Nonlinear Optical Materials and Devices for Photonic Switching, (1 May 1990); doi: 10.1117/12.18103; https://doi.org/10.1117/12.18103
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