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Double-clad fiber michelson interferometer for measurement of temperature and refractive index

Musa, S. M. A. and Baharin, N. F. and Azmi, Asrul Izam and Raja Ibrahim, R. K. and Abdullah, A. S. and Mohd. Noor, M. Y. and Qi, Haifeng (2018) Double-clad fiber michelson interferometer for measurement of temperature and refractive index. Microwave and Optical Technology Letters, 60 (4). pp. 822-827. ISSN 0895-2477

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Official URL: http://dx.doi.org/10.1002/mop.31056


An all-fiber Michelson interferometer based on double-clad fiber (DCF) is proposed for temperature and refractive index (RI) sensing. The sensor is formed by continuous splicing between single mode fiber, multimode fiber, and DCF. Temperature measurement is achieved by monitoring the dip wavelength shift of the interferometer spectra resulting from thermo-optic effect on core and first cladding of DCF. RI measurement is established from the power change in spectra due to the Fresnel's reflection at the DCF tip. Experimental result on 18.5 mm sensor manifests that temperature and RI responses are distinguishable. For instance, power level at 1540.5 nm exhibits quadratic shift to RI changes while unaffected to temperature changes. Dip wavelengths of sensor spectra demonstrate linear shift to temperature changes while unaffected by RI changes. The proposed sensor is cost effective as sensor fabrication only requires conventional splicing. Sensor capability to distinguish temperature and RI parameters makes it practical for broad range applications including for biomedical and food industries.

Item Type:Article
Uncontrolled Keywords:double-clad fiber, multi-parameter sensing, temperature and refractive index sensor
Subjects:Q Science > QC Physics
ID Code:85874
Deposited By: Yanti Mohd Shah
Deposited On:28 Jul 2020 02:45
Last Modified:28 Jul 2020 02:45

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