Refractive Index Detection of Liquid Analyte in Broad Range Using Multimode Fiber Speckle Sensor

Penglai Guo1; Xiaoling Peng1; Jianqing Li1; Penglai Guo2; Zhitai Zhou2; Jie Hu2; Chenlong Xue2; Jiaqi Hu2; Jialong Li2; Hong Dang2; Jinna Chen2; Liyang Shao2; Huanhuan Liu2; Perry Ping Shum2

10.1109/ACP55869.2022.10088535

2022

Asia Communications and Photonics Conference (ACP) / International Conference on Information Photonics and Optical Communications (IPOC)

2162-108X

978-1-6654-8156-4

2022 Asia Communications and Photonics Conference (ACP)

1981-1983

5-8 Nov. 2022

Shenzhen, China

345 E 47TH ST, NEW YORK, NY 10017 USA

IEEE

The multimode fiber (MMF) speckle sensor applied to measure the refractive index (RI) of liquid analyte is investigated. The change of refractive index is detected by the changes of speckle patterns with image correlation technology. Tapered multimode fibers are immersed in liquids analytes with different refractive index, and different speckle patterns are formed at the output of the fibers. Using zero- mean normalized cross-correlation coefficient (ZNCC) to calculate of correlation degree between different speckles can obtain the relationship between the refractive index and the speckle pattern correlation, so as to achieve the detection of the refractive index. Our results exhibit a linear correlation over the large range of refractive index variations, i.e., from 1.3449 to 1.4323. The sensitivity of the speckle sensor is 2.56 RIU-1.

tapered multimode fiber multimode fiber speckle sensor refractive index sensing large dynamics range

其他

英语

CPCI-S

Stable Support Program for Higher Edu cation Institutions from Shenzhen Science, Technology & Innovation Commission[20200925162216001]

Engineering ; Optics ; Telecommunications

Engineering, Electrical & Electronic ; Optics ; Telecommunications

WOS:001000552100512

IEEE

1.School of Computer Science and Engineering, Macau University of Science and Technology, Macau, China
2.Department of Electrical and Electronic Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China

Penglai Guo,Xiaoling Peng,Jianqing Li,et al. Refractive Index Detection of Liquid Analyte in Broad Range Using Multimode Fiber Speckle Sensor[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2022:1981-1983.