Title :
Nonorthogonal coupled-mode theory of grating-assisted codirectional couplers
Author :
Huang, Weiping ; Lit, John W.Y.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
fDate :
7/1/1991 12:00:00 AM
Abstract :
Grating-assisted codirectional couplers are analyzed by a nonorthogonal coupled-mode theory. The coupled-mode equations are solved exactly, and the effects of all the space harmonics generated by the periodic gratings are included in the analysis. More rigorous relations among the grating period, the grating height, and the coupling length are established. The power exchange between the guides is investigated as a function of the propagation distance and the wavelength. A comparison with previous approximate solutions is made and discussed
Keywords :
diffraction gratings; directional couplers; optical couplers; optical waveguide theory; coupled-mode equations; coupling length; grating height; grating period; grating-assisted codirectional couplers; nonorthogonal coupled-mode theory; periodic gratings; power exchange; propagation distance; space harmonics; wavelength; Arrayed waveguide gratings; Couplers; Couplings; Equations; Frequency conversion; Harmonic analysis; Phased arrays; Physics computing; Power markets; Propagation constant;
Journal_Title :
Lightwave Technology, Journal of
