Refractive index sensor based on stress-induced long period grating |
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Authors: | Guei-Ru Lin Hung-Ying Chang Ming-Yue Fu Hao-Jan Sheng Wen-Fung Liu |
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Institution: | 1. Ph.D. Program in Electrical and Communications Engineering, Feng Chia University, Taichung, 40724, Taiwan, R.O.C. 2. Department of Avionics Engineering, Air Force Academy, Kaohsiung, 82047, Taiwan, R.O.C. 3. Department of Electrical Engineering, Feng Chia University, Taichung, 40724, Taiwan, R.O.C.
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Abstract: | We proposed a novel refractive index sensor based on a side-polishing fiber to be cascaded with a stress-induced long period fiber grating (LPG), which is created by applying a force to a V-grooved plate on the single mode fiber with micro-bending deformation. When the refractive index (RI) surrounding the side-polishing surface is changed, the LPG-induced cladding mode light could be coupled back to the core mode, so that it will result in the magnitude variation of LPG loss-peak. This property of index sensing based on the stress-induced LPG by monitoring the power-level change may be exploited in chemical sensing and environmental monitoring applications. |
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