There is an increasing interest in using an integrated
optical waveguide as a displacement or pressure sensor. This
paper provides a theoretical analysis of 3-D channel
waveguides subjected to deformation. The analysis is rather
general and can be extended to many practical channel
waveguides. The motivation for this paper is to provide the
designers of integrated optical sensors simple formulas to
evaluate designs and material systems.
Our analysis begins with a straight channel guide having an
isotropic refractive index. In Section I, we consider the
wave solutions to this channel waveguide using the Marcatili
method. We give all the pertinent equations for performing
first order calculations.