8 January 2008 Thermal stress effects on the mode field characteristics of arrayed waveguides
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Abstract
Thermal stress effects on the mode field characteristics of arrayed waveguides are studied precisely by finite element method (FEM) with plain strain model. The amplitudes of Ex and Ey are comparable for the Ex11 mode and the Ey11 mode in a homogeneous and isotropic optical channel waveguide. Considering the elasto-optic effect, the refractive indices are inhomogeneous and anisotropic. It is shown that the amplitude of Ey for the Ex11 mode and that of Ex for the Ey11 mode are much smaller than the other electric field components. The simplest method to apply thermal stress is to place a stress plate on the arrayed waveguides. It is shown that the effective indices of the two modes, especially the Ey11 mode, can be tuned by stress plates with different thickness. The order of magnitude of tune range is 10-4 whereas the material of plate is aluminum. The effective indices can be increased by attaching an aluminum plate with appropriate thickness under arrayed waveguides, and will be decreased whatever the thickness of the plate is set if attached over arrayed waveguides. However, the stress plate has small effect on the optical mode fields.
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Huamao Huang, Huamao Huang, Dexiu Huang, Dexiu Huang, Wen Liu, Wen Liu, Kan Yu, Kan Yu, } "Thermal stress effects on the mode field characteristics of arrayed waveguides", Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68381R (8 January 2008); doi: 10.1117/12.756551; https://doi.org/10.1117/12.756551
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