Title :
Self-switching in hollow waveguides with a Kerrlike nonlinear permittivity
Author_Institution :
Dept. of Electr. Eng., Shizuoka Univ., Hamamatsu, Japan
fDate :
10/1/1990 12:00:00 AM
Abstract :
The dispersion relations, stability, and excitation of the stationary nonlinear transverse electric (TE) waves guided by a nonlinear hollow waveguide are examined numerically. This waveguide consists of a self-focusing nonlinear film bounded by two identical linear claddings of the higher refractive index. Since a minimum power for guidance of the stationary waves always exists, the nonlinear hollow waveguide acts as a lower threshold device. A stability analysis using the beam propagation method shows that all the stationary TEn modes, including the asymmetric TE0 mode, are stable on the positively sloped branch (dP/dβ>0) of the nonlinear dispersion curve. The lower threshold device using the nonlinear hollow waveguide exhibits very sharp power-switching characteristics, and the required device length is fairly short
Keywords :
optical Kerr effect; optical dispersion; optical switches; optical waveguide theory; optical waveguides; permittivity; Kerrlike nonlinear permittivity; asymmetric TE0 mode; beam propagation method; device length; dispersion relations; hollow waveguides; linear claddings; lower threshold device; nonlinear dispersion curve; nonlinear waveguides; positively sloped branch; refractive index; self-focusing nonlinear film; sharp power-switching characteristics; stability analysis; stationary TEn modes; stationary nonlinear TE wave excitation; Hollow waveguides; Nonlinear optical devices; Nonlinear optics; Optical films; Optical refraction; Optical variables control; Optical waveguides; Permittivity; Stimulated emission; Tellurium;
Journal_Title :
Lightwave Technology, Journal of
