Title :
Optical bistability in an NLDFB device showing absorption: comparison of feedback efficiencies for different grating profiles and study of the behavior of aperiodic and nonperfect grating profiles
Author :
Empsten, Annemie ; Veretennicoff, Irina
Author_Institution :
Dept. of Appl. Phys., Vrije Univ., Brussels, Belgium
fDate :
6/1/1990 12:00:00 AM
Abstract :
The influence of the different parameters on the optical bistable behavior of a distributed feedback structure with an intensity-dependent refractive index is studied. Previous work is generalized toward two-dimensional waveguides, showing absorption. A general method is proposed to calculate the coupling coefficients up to a desired accuracy. This method is used to compare the feedback efficiency of sine, rectangular, and trapezoidal grating profiles. The numerical integration routine that was developed allows for the study of combinations of different nonlinear distributed feedback (NLDFB) structures. This is used to do a first investigation on the behavior of NLDFB devices with an aperiodic or nonperfect grating profile
Keywords :
diffraction gratings; feedback; integrated optics; optical bistability; optical waveguide theory; refractive index; absorption; aperiodic grating profiles; coupling coefficients; distributed feedback structure; feedback efficiencies; grating profiles; integrated optical waveguide; intensity-dependent refractive index; nonlinear distributed feedback; nonperfect grating profiles; numerical integration; optical bistable; optical signal processor; rectangular grating profiles; sine grating profiles; trapezoidal grating profiles; Absorption; Distributed feedback devices; Gratings; Nonlinear optics; Optical bistability; Optical feedback; Optical refraction; Optical variables control; Optical waveguides; Refractive index;
Journal_Title :
Quantum Electronics, IEEE Journal of
