Laser & Optoelectronics Progress, Volume. 56, Issue 17, 170626(2019)
Brillouin Refractive Index Sensing Technique Based on Micro-Nano Fiber
This study proposes a Brillouin refractive index sensor based on the evanescent field effect of a micro-nano fiber. Multipeak Brillouin spectrum caused by hybrid acoustic field of the fiber is used for liquid refractive index sensing. Experimental results show that, for a 2 μm-micro-nano fiber, Brillouin peaks at approximately 10.4 GHz have a relatively high signal-to-noise ratio in NaCl solution, and their frequency shifts have a linear dependence on the liquid refractive index. A refractive index sensing sensitivity of 369.6 MHz/RIU (RIU is refractivity unit) is obtained within the range of 1.3333-1.3612. The proposed sensor will provide a new alternative for refractive index sensing.
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Chenhui Huang, Li Qin, Hao Liang, Linghao Cheng. Brillouin Refractive Index Sensing Technique Based on Micro-Nano Fiber[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170626
Category: Fiber Optics and Optical Communications
Received: Mar. 25, 2019
Accepted: Apr. 9, 2019
Published Online: Sep. 5, 2019
The Author Email: Huang Chenhui (154584790@qq.com), Liang Hao (lianghao1509@gmail.com)