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Optical Engineering

Fiber ring laser based on SMF–TCF–SMF structure for strain and refractive index sensing
Author(s): Fen Yu; Ben Xu; Yixin Zhang; Dongning Wang
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Paper Abstract

An erbium-doped fiber ring laser with embedded Mach–Zehnder interferometer (MZI) is constructed and experimentally demonstrated for strain and refractive index (RI) measurement. The MZI consists of a segment of thin-core fiber sandwiched between two single-mode fibers and acts as both the sensing component as well as a bandpass filter to select the lasing wavelength. The strain sensitivity of - 0.97    pm / μ ϵ and RI sensitivity of 44.88    nm / RIU are obtained in the range of 0 to 1750    μ ϵ and 1.3300 to 1.3537, respectively. The high-optical signal-to-noise ratio of > 50    dB and narrow 3-dB bandwidth of < 0.11    nm obtained indicate that the fiber ring laser sensor is promising for high-precision strain and RI measurement.

Paper Details

Date Published: 12 December 2017
PDF: 4 pages
Opt. Eng. 56(12) 126105 doi: 10.1117/1.OE.56.12.126105
Published in: Optical Engineering Volume 56, Issue 12
Show Author Affiliations
Fen Yu, China Jiliang Univ. (China)
Ben Xu, China Jiliang Univ. (China)
Yixin Zhang, China Jiliang Univ. (China)
Dongning Wang, China Jiliang Univ. (China)

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