Accession Number : ADP007578

Title :   Nonlinear Guided Waves in Semiconductors: Induced Focusing and Directional Coupling,

Corporate Author : ARIZONA UNIV TUCSON OPTICAL SCIENCES CENTER

Personal Author(s) : Gibbs, H. M. ; Khitrova, G. ; Jin, R. ; Chuang, C. L. ; Xu, J.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Recently, Agrawal suggested a novel focusing effect in a self-defocusing medium. The transverse spatial gradient of the field amplitude of a strong pump beam induces a refractive index profile that can result in focusing and deflection of a weak beam. Below the band edge of a semiconductor, the optical nonlinearity is self-defocusing; far enough above the decreased absorption, the nonlinearity is self-focusing, but the > 100 micron length and large absorption there (Alpha approx. = 1 micron/1) of a semiconductor waveguide result in no transmission. Hence induced focusing is especially intriguing in a passive semiconductor waveguide because self-focusing cannot occur.

Descriptors :   *OPTICAL WAVEGUIDES, AMPLITUDE, DEFLECTION, EDGES, FOCUSING, GRADIENTS, LENGTH, PROFILES, PUMPS, REFRACTIVE INDEX, SEMICONDUCTORS, TRANSVERSE, WAVEGUIDES, SYMPOSIA, GALLIUM ARSENIDES, LASER PUMPING, DYE LASERS, RADIATION ABSORPTION, WAVEGUIDE COUPLERS.

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE