Abstract
In this paper, multi-sensor is proposed based on the evanescent field coupling effect on two optical fibers. The waveguide aligned side by side were numerically simulated using the beam propagation method (OptiBPM) simulator. Optical rays are confined within a waveguide by total internal reflection and closely visualized at the waveguide’s cladding interface via electromagnetic wave theory model. Distinct distances between optical fibers are considered for optical power loss and the sensor operation is explained in terms of these effects. The coupling coefficient express the products between the evanescent part of the field and the propagative part guided in the core. The performance of the device is found satisfactory to build higher order multi-sensor.
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