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23 March 2017 Ultrashort and high-sensitivity refractive index sensor based on dual-core photonic crystal fiber
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Abstract
An ultrashort and high-sensitivity refractive index sensor based on dual-core photonic crystal fiber (PCF) is proposed, and the characteristics are evaluated by finite-element method. The coupling characteristics can be changed by filling different index liquids in the holes of the PCF. Also, the transmission spectrum also changes as the length of the optical fiber is set to a specific value. The average sensitivities of 8916  nm/RIU (refractive index unit) and 8588  nm/RIU are realized in the index range from 1.41 to 1.438. The corresponding linearities are 0.9936 and 0.9916, respectively. The fiber length is just 3 mm, which could be widely used in the integrated sensing system. The sensor with high sensitivity and nice linearity is significative.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2017/$25.00 © 2017 SPIE
Qiang Liu, Shu-Guang Li, Jianshe Li, and Hailiang Chen "Ultrashort and high-sensitivity refractive index sensor based on dual-core photonic crystal fiber," Optical Engineering 56(3), 037107 (23 March 2017). https://doi.org/10.1117/1.OE.56.3.037107
Received: 18 January 2017; Accepted: 9 March 2017; Published: 23 March 2017
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