Microfiber structures for sensor applications

Harun, Sulaiman Wadi and Lim, Kok Sing and Ahmad, Harith (2012) Microfiber structures for sensor applications. Journal of Nonlinear Optical Physics & Materials, 21 (01). p. 1250003. ISSN 0218-8635

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Official URL: https://doi.org/10.1142/S0218863512500038

Abstract

Microfiber loop resonator (MLR) and microfiber knot resonator (MKR) are fabricated using melt-stretching method for applications in temperature and current sensor, respectively. The MLR is embedded into low refractive index polymer for robustness. Although the spacing of the transmission comb spectrum of the MLR is unchanged with temperature, the extinction ratio of the spectrum is observed to decrease linearly with temperature due to induced changes in the material's refractive index. The slope of the extinction ratio reduction against temperature is about 0.043dB/°C. With the assistance of a copper wire that is wrapped by the MKR, resonant wavelength can be tuned by varying the electric current delivered to the wire. The resonant wavelength change is based on the thermally induced optical phase shift in the MKR due to the heat produced by the flow of electric current over a short transit length. It is shown that the wavelength shift is linearly proportional to the square of current in the copper wire with a tuning slope of 46 pm/A 2.

Item Type: Article
Uncontrolled Keywords: Current sensor; Microfiber knot resonator; Microfiber loop resonator; Temperature sensor
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 03 Jan 2019 07:22
Last Modified: 03 Jan 2019 07:22
URI: http://eprints.um.edu.my/id/eprint/19894

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