Accession Number : ADP008167
Title : Nonlinear Switching and Pulse Breakup in a Semiconductor Directional Coupler with Multi-Photon Absorption,
Corporate Author : UNIVERSITY OF CENTRAL FLORIDA ORLANDO CENTER FOR RESEARCH IN ELECTRO-OPTICS A ND LASERS
Personal Author(s) : Villeneuve, A. ; Aitchison, J. S. ; Yang, C. C. ; Wigley, P. G. ; Ironside, C. N.
Report Date : APR 1992
Pagination or Media Count : 2
Abstract : Recently much interest has been placed in ultrafast all-optical switching in semiconductors near half the band gap. In this spectral range, the problem associated with two-photon absorption (2PA) can be avoided, while the relatively large nonlinear refractive index (n2) can still be utilized. Here we report for the first time a complete characterization of a near half beat length AlGaAs/GaAs quantum well (QW) nonlinear directional coupler (NLDC) and show the effects of multi-photon absorption (MPA) on nonlinear switching and pulse breakup. The NLDC used was made of 4 AlGaAs/GaAs QW's. A NaCl color-center laser with additive pulse mode-locking was used to produce 450 to 800 fsec pulses at lambda = 1.55 micrometers.
Descriptors : *HETEROJUNCTIONS, *WAVEGUIDE COUPLERS, *OPTICAL WAVEGUIDES, ALUMINUM GALLIUM ARSENIDES, COLOR CENTERS, COLORS, DIRECTIONAL, GALLIUM ARSENIDES, LENGTH, MICROMETERS, OPTICAL SWITCHING, PHOTONS, REFRACTIVE INDEX, SEMICONDUCTORS, TIME, TWO PHOTON ABSORPTION, RADIATION ABSORPTION, LIGHT PULSES, SEMICONDUCTOR LASERS.
Subject Categories : Electrooptical and Optoelectronic Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE