Fiber ring laser based on SMF–TCF–SMF structure for strain and refractive index sensing

Fen Yu; Ben Xu; Yixin Zhang; Dongning Wang

doi:10.1117/1.OE.56.12.126105

12 December 2017 Fiber ring laser based on SMF–TCF–SMF structure for strain and refractive index sensing

Fen Yu, Ben Xu, Yixin Zhang, Dongning Wang

Author Affiliations +

Optical Engineering, Vol. 56, Issue 12, 126105 (December 2017). https://doi.org/10.1117/1.OE.56.12.126105

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/μϵ and RI sensitivity of ∼44.88 nm/RIU are obtained in the range of 0 to 1750 μϵ 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.

Citation Download Citation

Fen Yu, Ben Xu, Yixin Zhang, and Dongning Wang "Fiber ring laser based on SMF–TCF–SMF structure for strain and refractive index sensing," Optical Engineering 56(12), 126105 (12 December 2017). https://doi.org/10.1117/1.OE.56.12.126105

Received: 28 September 2017; Accepted: 20 November 2017; Published: 12 December 2017

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