Stress-Optical Effects - with Generalized Plane Strain and in a Photonic Waveguide
Model ID: 190
Planar photonic waveguides in silica (SiO2) have a great potential for use in wavelength routing applications. The major problem with these kinds of waveguides is birefringence. Anisotropic refractive indices result in fundamental mode splitting and pulse broadening. The goal is to minimize birefringence effects by adapting materials and manufacturing processes. One source of birefringence is the use of a silicon (Si) wafer on which the waveguide structure is deposited.
After annealing at high temperatures, a mismatch in thermal expansivity between the silica and silicon layers results in thermally induced stresses in the structure at the operating temperature (typically room temperature). Both models require the RF Module and the Structural Mechanics Module.