Abstract

Preparation and characterization of a liquid level sensor based on macro-bending coupling of fibers are demonstrated in this Letter. The sensitive component can be obtained through a twisting and twining structure of transparent cladding plastic fibers. The difference in light power originating from the surrounding media in the fibers is tested. The light power loss for different tested media and the fiber bending magnitude are investigated. The sensing measurements show that the coupling light power in the passive fiber decreases in accordance with increasing liquid level, whereas it exhibits a steady tendency in the case of the active fiber.

© 2015 Chinese Laser Press

Analysis of a plastic optical fiber-based displacement sensor

Felipe Jiménez, Jon Arrue, Gotzon Aldabaldetreku, Gaizka Durana, Joseba Zubia, Olaf Ziemann, and Christian-Alexander Bunge
Appl. Opt. 46(25) 6256-6262 (2007)

Liquid-level sensor with optical fibers

Katsuharu Iwamoto and Isao Kamata
Appl. Opt. 31(1) 51-54 (1992)

Polymer optical fiber twisted macro-bend coupling system for liquid level detection

Yu-Long Hou, Wen-Yi Liu, Shan Su, Hui-Xin Zhang, Jia-Wei Zhang, Jun Liu, and Ji-Jun Xiong
Opt. Express 22(19) 23231-23241 (2014)

In-line reflected fiber sensor for simultaneous measurement of temperature and liquid level based on tapered few-mode fiber

Yichun Li, Zhuo Song, Jiao Pan, Hanglin Lu, and Junhui Hu
Opt. Express 30(5) 7870-7882 (2022)

Sub-micrometer resolution liquid level sensor based on a hollow core fiber structure

Dejun Liu, Fengzi Ling, Rahul Kumar, Arun Kumar Mallik, Ke Tian, Changyu Shen, Gerald Farrell, Yuliya Semenova, Qiang Wu, and Pengfei Wang
Opt. Lett. 44(8) 2125-2128 (2019)