Abstract
In this paper we report about numerical simulation of optical response of chitosan waveguide to the change in the relative humidity value. It is shown that optical response occurs by changing of waveguide propagation conditions. Herein, at a lower humidity value (less than 30%) chitosan waveguide has an asymmetric refractive index profile. The humidity level increasing leads to appearing a gradient profile of refractive index. Obtained numerical data has good agreement with experimental results.
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