Title :
A multiple-scale analysis of grating-assisted couplers
Author :
Little, Brent E. ; Huang, Weiping P. ; Chaudhari, S.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
fDate :
10/1/1991 12:00:00 AM
Abstract :
Optical directional couplers with longitudinal periodic perturbations or gratings are analyzed by a multiple-scale solution to the coupled-mode equations. The use of two length scales in the analysis becomes the key to obtaining globally valid analytic solutions, which are shown to be in excellent agreement with the exact numerical solutions. Because of the nonorthogonality of the coupled modes in the structure, two different coupling lengths, a maximum power transfer length and a zero crosstalk length, are predicted for the power exchange. The spectral properties of the coupler are also studied through a generalized multiple scale method
Keywords :
diffraction gratings; directional couplers; optical couplers; optical waveguide theory; coupled mode nonorthogonality; coupled-mode equations; directional couplers; generalized multiple scale method; globally valid analytic solutions; grating-assisted couplers; gratings; length scales; longitudinal periodic perturbations; maximum power transfer length; multiple-scale analysis; optical couplers; power exchange; spectral properties; zero crosstalk length; Arrayed waveguide gratings; Councils; Directional couplers; Equations; Frequency conversion; Optical crosstalk; Optical frequency conversion; Optical waveguides; Phased arrays; Power markets;
Journal_Title :
Lightwave Technology, Journal of
