Title :
Perturbation analysis of fibre acoustic modes
Author :
Safaai-Jazi, A. ; Jen, C.K. ; Farnell, G.W.
Author_Institution :
McGill University, Department of Electrical Engineering, Montreal, Canada
Abstract :
A perturbation analysis of guided modes in weakly guiding fibre acoustic waveguides is outlined. The perturbing parameter is the shear velocity difference between the core and cladding. It is seen that zero-order solutions of acoustic modes are identical in mathematical form to those of analogous optical modes. The error in the zero-order approximation of acoustic modes, however, is higher than that of optical modes.
Keywords :
acoustic waveguides; fibres; perturbation techniques; ultrasonic propagation; US propagation; error; fibre acoustic modes; fibre acoustic waveguides; guided modes; perturbation analysis; shear velocity difference; zero-order approximation; zero-order solutions;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870258
