Ultrashort and high-sensitivity refractive index sensor based on dual-core photonic crystal fiber

Qiang Liu; Shu-Guang Li; Jianshe Li; Hailiang Chen

doi:10.1117/1.OE.56.3.037107

23 March 2017 Ultrashort and high-sensitivity refractive index sensor based on dual-core photonic crystal fiber

Qiang Liu, Shu-Guang Li, Jianshe Li, Hailiang Chen

Author Affiliations +

Optical Engineering, Vol. 56, Issue 3, 037107 (March 2017). https://doi.org/10.1117/1.OE.56.3.037107

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.

Citation Download Citation

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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