Abstract
This work presents optimization of the dimension of ridge waveguide structure to be used as temperature sensor. The objective of the work is to obtain an optimum dimension of ridge waveguide so that it provides high sensitivity to temperature. Ridge waveguide structure was chosen since it has strong light confinement and low bending loss. The optimization was done by simulating the temperature distribution and electric field distribution inside the waveguide using Finite Difference Method (FDM). The simulations were done for various waveguide width and waveguide thickness. The results showed that as the width increased, the sensitivity decreased. The optimum ranges of waveguide dimensions are between 10μm to 20μm and 15μm to 25μm for width and thickness, respectively.
Highlights
Temperature sensors have attracted much attention due to its important role in various applications such as environmental monitoring, chemical industry and automotive industry
Optical fiber sensor suffers from bending loss that degrades the accuracy, especially for intensity modulation based sensor
The optimum dimension for temperature sensor application is in the range of 10 m to 20 m and 15 m to 25 m for width and thickness, respectively
Summary
Temperature sensors have attracted much attention due to its important role in various applications such as environmental monitoring, chemical industry and automotive industry. Conventional methods have been used to develop temperature sensor such as mechanical and electrical method. Conventional methods are not suitable for conductive and corrosive environment [1]. Optical temperature sensors have been proposed to replace the conventional sensors. The most common optical temperature sensor is optical fiber-based sensor with various methods such as interference method [1], wavelength modulation method [2] and intensity modulation method [3]. Optical fiber sensors have advantages of free from electromagnetic interference, suitable for hazardous environment and can be arranged in multiplexed array. Optical fiber sensor suffers from bending loss that degrades the accuracy, especially for intensity modulation based sensor
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