Leaky wave analysis of an optical grating coupler with a large grating period.
Results of a rigorous leaky wave analysis of an optical grating coupler having a large grating period are presented. The coupler is designed so that most of the guided-wave power is transferred to a substrate beam progressing in the forward direction with the first-order air beam made evanescent. It is found that a large power partition into the substrate beam can readily be obtained in spite of the presence of a number of higherorder propagating space harmonics. Validity of the approximate perturbation method for the case of the long grating period is also examined.
Matsumoto
M
M
Ohtsuka
M
M
Matsuhara
M
M