Dual-parameter sensor based on a no-core fiber and fiber Bragg grating

Guei-Ru Lin; Ming-Yue Fu; Cheng-Ling Lee; Wen-Fung Liu

doi:10.1117/1.OE.53.5.050502

20 May 2014 Dual-parameter sensor based on a no-core fiber and fiber Bragg grating

Guei-Ru Lin, Ming-Yue Fu, Cheng-Ling Lee, Wen-Fung Liu

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Optical Engineering, Vol. 53, Issue 5, 050502 (May 2014). https://doi.org/10.1117/1.OE.53.5.050502

Abstract

A dual-parameter fiber sensor achieved by cascading a fiber Bragg grating with a no-core fiber (NCF) is used for simultaneously detecting both the temperature and index physical parameters. The main index sensing mechanism of NCF is based on the wavelength shift of multimode signals’ interference (MMI), and the temperature-sensing mechanism is determined by the Bragg wavelength shift and MMI wavelength shift. As the testing index value approaches the cladding index of the optical fiber, an MMI-induced loss-dip is thus created with a sensitivity of 899 nm/RIU due to the phase-match condition of MMI being satisfied. By coating the thin films of different materials, this kind of sensor can be applied in a wide range of different sensing systems.

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Guei-Ru Lin, Ming-Yue Fu, Cheng-Ling Lee, and Wen-Fung Liu "Dual-parameter sensor based on a no-core fiber and fiber Bragg grating," Optical Engineering 53(5), 050502 (20 May 2014). https://doi.org/10.1117/1.OE.53.5.050502

Published: 20 May 2014

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