Coreless side polished fiber as ultra-sensitive refractive index sensor

Huazhuo Dong; Junwen Guan; Jianhui Yu; Huihui Lu; Yunhan Luo; Jun Zhang; Zhe Chen; Zhuoqi Wu

doi:10.1117/12.2228838

29 April 2016 Coreless side polished fiber as ultra-sensitive refractive index sensor

Huazhuo Dong, Junwen Guan, Jianhui Yu, Huihui Lu, Yunhan Luo, Jun Zhang, Zhe Chen, Zhuoqi Wu

Proceedings Volume 9899, Optical Sensing and Detection IV; 98992S (2016) https://doi.org/10.1117/12.2228838
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

A novel type of coreless side-polished fiber (CSPF) was investigated numerically and experimentally for sensing refractive index (RI). Numerical simulations and experiments found that multi-mode interference can be excited at the transitional section of coreless side-polished fiber, leading to resonant dips in transmission spectrum through such a CSPF. A red shift of such dips was observed due to increase in surrounding RI, whereby the CSPF can be used as RI sensor. Interestingly, by such a simple CSPF structure, ultra-high sensitivity of 7225nm/RIU for RI range of 1.432 to 1.434 was achieved in our experiment. As the CSPF can act as a versatile platform, the high sensitivity of the CSPF will open new opportunities for other high sensitive sensors and fiber devices.

Citation Download Citation

Huazhuo Dong, Junwen Guan, Jianhui Yu, Huihui Lu, Yunhan Luo, Jun Zhang, Zhe Chen, and Zhuoqi Wu "Coreless side polished fiber as ultra-sensitive refractive index sensor", Proc. SPIE 9899, Optical Sensing and Detection IV, 98992S (29 April 2016); https://doi.org/10.1117/12.2228838

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