Intensity-modulated abrupt tapered Fiber Mach-Zehnder Interferometer for the simultaneous sensing of temperature and curvature. (December 2016)

• Record Type: Journal Article
• Authors: Raji, Y.M.; Lin, H.S.; Ibrahim, S.A.; Mokhtar, M.R.; Yusoff, Z.
• Is Part Of: Optics & laser technology. Volume 86(2016)
• Page Start: 8
• Page End: 13
• Publication Date: 2016-12
• Subjects: Fiber-optic sensors -- Mach-Zehnder Interferometer -- Temperature sensor -- Curvature sensor -- Abrupt taper; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2016.06.006
• Languages: English
• ISSNs: 0030-3992

Abstract

Abstract: An abrupt tapered fiber In-Line Mach-Zehnder Interferometer sensor for simultaneous measurement of temperature and curvature is proposed and experimentally demonstrated. The sensor head is fabricated by arcing Corning SMF-28 using a commercial arc fusion splicer. The individual parameters discrimination was achieved by manipulating the unequal sensitivities of optical power to temperature and curvature obtained at two wavelengths within the sensing spectrum. The curvature and temperature sensitivities at λ 1 (1537 nm) and λ 2 (1568.7 nm) were found to be 11.8264 dBm/m −1, 12.4885 dBm/m −1 and 0.0829 dBm/°C, 0.0833 dBm/°C, respectively. The experimental results show unperturbed readings with rms deviation of ±0.1801 m −1 and ±0.0826 °C, for curvature and temperature measurements, respectively, through measurement of optical power response of the sensor. With this simultaneous sensing technique, the proposed sensor can be deployed for many field applications such as nondestructive structural health monitoring of civil infrastructure. Abstract : Highlights: Curvature sensitivity at λ 1 (1537 nm) is 11.8264 dBm/m −1 . Curvature sensitivity at λ 2 (1568.7 nm) is 12.4885 dBm/m −1 . Temperature sensitivity at λ 1 (1537 nm) is 0.0829 dBm/°C. Temperature sensitivity at λ 2 (1568.7 nm) is 0.0833 dBm/°C. Curvature and temperature rms deviation is ±0.1801 m −1 and ±0.0826 °C, respectively.