Universiti Teknologi Malaysia Institutional Repository

Fiber optic temperature sensor based on No-Core Fiber (NCF) for high temperature sensing

Mohamed, Norhafniza (2019) Fiber optic temperature sensor based on No-Core Fiber (NCF) for high temperature sensing. Masters thesis, Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering.


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This paper proposes an improved fiber optic temperature sensor based on No- Core-Fiber (NCF) with sol-gel coating material for high temperature sensing. The main advantage of this sensor is the multimode interference (MMI) effect could react better to the changes of its surrounding compared with the multimode fiber. Without a physical cladding, an NCF will consider its surrounding as the cladding layer that facilitates the total internal reflection of the propagated light wave. With that configuration, changes of surrounding refractive index will impact the MMI effect directly. The design of sensor using Rsoft Beam Prop software has been carried out to determine the power intensity and temperature sensitivity. In addition, three different sol-gel materials were used to evaluate the sensor performance. From the simulation result, compared to TiO2 and SiNx, it is found that the ZrO2 coating has most significant performance in enhancing seven time greater than without coating within temperature range of 25 °C to 100 °C. The temperature sensitivity became 0.01637 dB/°C rather than 0.0225 dB/°C. Therefore, the sensor with ZrO2 is the most suitable for monitoring the high-temperature sensing applications.

Item Type:Thesis (Masters)
Additional Information:Thesis (Sarjana Kejuruteraan Elektrik (Elektronik Dan Telekomunikasi)) - Universiti Teknologi Malaysia, 2019; Supervisor : Dr. Ahmad Sharmi Abdullah
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:86165
Deposited By: Fazli Masari
Deposited On:30 Aug 2020 17:04
Last Modified:30 Aug 2020 17:04

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