Abstract
We have used the collocation method to model the characteristics of guided-wave Bragg gratings. The collocation method being a total field method, takes into account all modes, guided as well as radiation. We have first studied the effect of the grating structural parameters such as the grating profile and the duty cycle of periodic variation and have shown that these can have significant effect on the Bragg wavelength and the reflection spectrum. We have then obtained the response characteristics of gratings for their use in strain, temperature and pressure sensing. Our results compare very well with available experimental results. Comparisons with the coupled mode theory have also been included.
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Taneja, A.K., Sharma, A. Modelling of guided-wave Bragg gratings and grating sensors using the collocation method. Optical and Quantum Electronics 32, 1033–1046 (2000). https://doi.org/10.1023/A:1007007705416
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DOI: https://doi.org/10.1023/A:1007007705416