12 December 2017 Fiber ring laser based on SMF–TCF–SMF structure for strain and refractive index sensing
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Fen Yu, Fen Yu, Ben Xu, Ben Xu, Yixin Zhang, Yixin Zhang, Dongning Wang, 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 . Submission: Received: 28 September 2017; Accepted: 20 November 2017
Received: 28 September 2017; Accepted: 20 November 2017; Published: 12 December 2017
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