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, Ben Xu, Yixin Zhang, 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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