In-Fiber Michelson Interferometer Based on Thin-Core Fiber Combined with an End-Face Mirror

Abstract:

An in-fiber Michelson interferometer (IFMI) is proposed and experimentally demonstrated. The configuration is formed by a thin-core fiber (TCF) following with a single mode fiber whose end tip is covered by a thick silver film as a mirror. The TCF excites cladding modes into downstream SMF via the mismatch-core splicing interface, and the low-order cladding modes can be reflected back to the fiber core via the mirror. A well-defined interference pattern is obtained due to the interference of between core and cladding modes. Experimental results represent that the device is linearly sensitive to the ambient temperature variation, and the selected interference dip of 1530nm represents a temperature sensitivity of 67.59pm/oC. The IFMI is compact and simple, and is a good candidate for ambient temperature measurement.

• Periodical: Advanced Materials Research (Volume 645)
• Pages: 202-207
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.645.202
• Online since: January 2013
• Authors: Wen Fu, Yao Hou, Liang Guo, Qiang Zhou Rong
• Keywords: Optics Fiber Sensor, Temperature Measurement

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