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Simulation study of microring resonator for seawater salinity sensing with weak temperature dependence

Published online by Cambridge University Press:  15 October 2014

Guo-Xiang Li ,
Jing Wang ,
Hong-Juan Yang ,
Zhao-Tang Su  and
Shan-Shan Wang
Guo-Xiang Li
Affiliation:
Department of Physics, Ocean University of China, Qingdao 266100, P.R. China
Jing Wang
Affiliation:
Department of Physics, Ocean University of China, Qingdao 266100, P.R. China
Hong-Juan Yang
Affiliation:
Department of Physics, Ocean University of China, Qingdao 266100, P.R. China
Zhao-Tang Su
Affiliation:
Department of Physics, Ocean University of China, Qingdao 266100, P.R. China State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, P.R. China
Shan-Shan Wang*
Affiliation:
Department of Physics, Ocean University of China, Qingdao 266100, P.R. China
*
ae-mail: wangshanshan@ouc.edu.cn
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Abstract

A seawater salinity sensor based on microring resonator with weak temperature dependence is proposed, which is coated by MgF2 film with positive thermo-optic coefficient. Temperature dependences of the sensor on fiber diameter, probing wavelength and coating thickness are theoretically investigated and ranges of microfiber diameters for weak temperature dependence are obtained. Under the temperature insensitive condition, sensitivity and detection limit of salinity sensing are studied. By optimizing the parameters of the sensing system, salinity sensitivity and detection limit can reach 0.03 nm/‰ and 0.13‰, respectively. The model presented here may be helpful for developing weak temperature dependence sensors for salinity sensing with high sensitivity, low detection limit and miniaturized sizes.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 68 , Issue 2 , November 2014 , 20502
Copyright
© EDP Sciences, 2014

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