Post chemical Etching of Tapered Seven-Core Fiber Sensor for Enhanced Figure of Merit

Zhen Tian, Yicun Yao, Jinhui Yuan*, Liqiang Zhang, Nan Kuang Chen, Yanqing Zhang, Minghong Wang, Qiang Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A post chemical etching process to a tapered seven core fiber (TSCF) is proposed and experimentally demonstrated to effectively adjust the mode profiles of high-order supermodes, aimed to improve the figure of merit (FOM). The experimental results show that the FOM of an etched TSCF (ETSCF) is as high as 1431.36 1/RIU, a 7.32 times enhancement compared to that of TSCF without etching, provided the TSCF has the same taper waist diameter of 19.20 µm. The proposed method opens a new method for optimizing optical fiber sensor performance.
Original languageEnglish
JournalOptics Letters
Publication statusAccepted/In press - 23 Aug 2022

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