To read the full version of this content please select one of the options below:

Long-period fiber grating cascaded to thin-core fiber for simultaneous measurement of liquid refractive-index and temperature

Meng Jiang (College of Science, Donghua University, Shanghai, China)
Ze-Ming Wang (College of Science, Donghua University, Shanghai, China)
Zhong-Ze Zhao (College of Science, Donghua University, Shanghai, China)
Kun Li (College of Science, Donghua University, Shanghai, China)
Fu Yang (College of Science, Donghua University, Shanghai, China)

Sensor Review

ISSN: 0260-2288

Article publication date: 5 December 2017

Issue publication date: 8 January 2018

Downloads
213

Abstract

Purpose

The purpose of this paper is to demonstrate a simple fiber sensor for simultaneous measurement of liquid refractive-index (RI) and temperature.

Design/methodology/approach

The sensor structure is formed by a long period fiber grating cascaded with a section of thin-core fiber. The long period fiber grating is fabricated on single mode fiber, followed by a section of 20-mm length thin-core fiber which is a modal interferometer.

Findings

Cladding mode interference between long period fiber grating and thin-core fiber modal interferometer is weak in the experimental investigation. Both of these two cladding mode type fiber devices are sensitive to surrounding RI and temperature. So the RI and temperature can be measured simultaneously by monitoring the spectral characteristics of the compound sensor. The sensitivity is calibrated and sensor matrix is provided in the experiment.

Originality/value

This proposed fiber sensor is simple, tough, cost-effective and suitable for discriminate the liquid RI and temperature with high sensitivity.

Keywords

Acknowledgements

This work was supported by Pujiang Program (No. 14PJ1400100), the National Natural Science Foundation of China (No. 51575099) and the Shanghai Natural Science Foundation (No. 15ZR1401700). The author Fu Yang would like to express sincere thanks to the “DHU Distinguished Young Professor Program”.

Citation

Jiang, M., Wang, Z.-M., Zhao, Z.-Z., Li, K. and Yang, F. (2018), "Long-period fiber grating cascaded to thin-core fiber for simultaneous measurement of liquid refractive-index and temperature", Sensor Review, Vol. 38 No. 1, pp. 79-83. https://doi.org/10.1108/SR-11-2016-0242

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited