A Novel In-Line Fiber Mach–Zehnder Interferometer Temperature Sensor Made of Thermally Expanded Core Fiber

Abstract:

A novel in-line fiber temperature sensor by splicing a piece of single mode fiber between two thermally expanded core fibers at their core-expanded ends is proposed and demonstrated. This structure forms an all fiber Mach–Zehnder interferometer due to the interference between the core mode and the cladding modes of the single mode fiber. The fabricated sensor is applied to measure temperature changes. The temperature sensitivity of the sensor at a length of 6.3cm is about 65.3 pm/°C. The proposed sensor is low cost, easily fabricated, and may be useful for detection of temperature.

• Periodical: Applied Mechanics and Materials (Volumes 635-637)
• Pages: 856-859
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.635-637.856
• Online since: September 2014
• Authors: Ying Wu Zhou*, Sheng Yu Chen
• Keywords: Sensor, Temperature, Thermally Expanded Core Fiber

References

[1] W. Liang, Y. Huang, Y. Xu et al., Highly sensitive fiber Bragg grating refractive index sensors [J] . Appl . Phys. Let t., Vol. 86 (2005), p.151122.

DOI: 10.1063/1.1904716

[2] C. -H. Lin, L. Jiang, H. Xiao et al., Fabry-Perot interferometer embedded in a glass chip fabricated by femtosecond laser [J]. Opt. Lett., Vol. 34 (2009), p.2408～2410.

DOI: 10.1364/ol.34.002408

[3] X. Guo, L. Tong, Supported microfiber loops for optical sensing [J]. Opt. Express, Vol. 16 (2008), p . 14429～14434.

DOI: 10.1364/oe.16.014429

[4] X. Fang, C.R. Liao, D.N. Wang, Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing [J]. Opt. Lett., Vol. 35 (2010), p.1007～1009.

DOI: 10.1364/ol.35.001007

[5] P. Lu, L. Men, K. Sooley et al., Tapered fiber Mach-Zehnder interferometer for simultaneous measurement of refractive index and temperature[J]. Appl. Phys. Lett., Vol. 94 (2009), p.131110.

DOI: 10.1063/1.3115029

[6] Z. Tian, S. Yam, J. Barnes, et al., Refractive index sensing with Mach-Zehnder interferometer based on concatenating two single-mode fiber tapers[J]. IEEE Photon. Technol. Lett., Vol. 20 (2008), p.626～628.

DOI: 10.1109/lpt.2008.919507

[7] L.V. Nguyen, D. Hwang, S. Moon et al., High temperature fiber sensor with high sensitivity based on core diameter mismatch [J]. Opt. Express, vol. 16(2008) p.11369～11375.

DOI: 10.1364/oe.16.011369

[8] B. H. Lee and J. Nishii, Self-interference of long-period fibre grating and its application as temperature sensor[J]. Electron. Lett., vol. 34(1998) p.2059～(2060).

DOI: 10.1049/el:19981420

[9] E. Li, X. Wang and C. Zhang, Fiber-optic temperature sensor based on interference of selective higher-order modes[J] . Appl. Phys. Lett., vol. 89(2006) , p.091119.

DOI: 10.1063/1.2344835

[10] J. Villatoro, V.P. Minkovich, V. Pruneri et al., Simple all-microstructured optical-fiber interferometer built via fusion splicing[J]. Opt. Express, vol. 15(2007), p.1491～1496.

DOI: 10.1364/oe.15.001491

[11] J. Zhu, A. Zhang, T. Xia et al., Fiber-optic high temperature sensor based on thin core fiber modal interferometer[J]. IEEE Sensors Journal, vol. 10(2010) p.1415～1418.

DOI: 10.1109/jsen.2010.2042592

[12] M. Kihara, M. Matsumoto, T. Haibara et al., Characteristics of thermally expanded core fiber.