Photonic crystal fiber based modal interferometer for refractive index sensing

Ming Deng; Xiaokang Sun; Wei Huang; Huifeng Wei; Jiang Li

doi:10.1117/12.2059445

2 June 2014 Photonic crystal fiber based modal interferometer for refractive index sensing

Ming Deng, Xiaokang Sun, Wei Huang, Huifeng Wei, Jiang Li

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 915785 (2014) https://doi.org/10.1117/12.2059445
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

A core-cladding-mode interferometer (CCMI) is fabricated by splicing a single-mode fiber (SMF) to an endlessly singlemode photonic crystal fiber (ESM-PCF). The optimum collapsed length of ESM-PCF is investigated to ensure a higherorder cladding mode of ESM-PCF to be excited, serving as a sensing beam. At the end of ESM-PCF, a spherical endfacet with big radius is proposed to ensure from where the higher-order cladding mode to be reflected and then it interferes with the core mode serving as a reference beam. Such a device has an enhanced refractive index sensitivity of ~199 nm/RIU, offering potentials in biological and chemical applications.

Citation Download Citation

Ming Deng, Xiaokang Sun, Wei Huang, Huifeng Wei, and Jiang Li "Photonic crystal fiber based modal interferometer for refractive index sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915785 (2 June 2014); https://doi.org/10.1117/12.2059445

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