A High Sensitivity Refractive Index Sensor Based on Leaky Mode Coupler of MMI

被引：3

作者：

Saimon, Siti Mahfuza ^{[1
]}

Noor, Muhammad Yusof Mohd ^{[1
]}

Azmi, Asrul Izam ^{[1
]}

Abdullah, Ahmad Sharmi ^{[1
]}

Ibrahim, Mohd Haniff ^{[1
]}

Ahmad, Mohd Hafizi ^{[2
]}

Salim, Mohd Rashidi ^{[1
]}

Othman, Ahmad Fauzi ^{[3
]}

Alqazoun, Fouziyah Abdulsalam Hamid ^{[1
]}

机构：

[1] Univ Teknol Malaysia, Sch Elect Engn, Lightwave Commun Res Grp LCRG, Skudai 81310, Johor, Malaysia

[2] Univ Teknol Malaysia, Inst High Voltage & High Current, Skudai 81310, Malaysia

[3] Tenaga Nasl Berhad, Distribut Network Div, Kuala Terengganu 80673, Malaysia

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2022年 / 34卷 / 01期

关键词：

Optical fiber sensors; Optical fiber networks; Silicon compounds; Optical fiber couplers; Sensitivity; Interference; Oils; Fiber optic sensor; high refractive index; leaky mode; multimode interference; silica rod; MULTIMODE-SINGLE-MODE; OPTICAL-FIBER; REFRACTOMETER; GRATINGS;

D O I：

10.1109/LPT.2021.3137288

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel leaky mode coupler of multimode interference (MMI) fiber structure is proposed and experimentally demonstrated for surrounding refractive indices higher than that of silica fiber. The sensor is composed of a section of silica rod (SR) and multimode fiber (MMF) between two identical single-mode fibers (SMFs) to form a single-mode-silica rod-multimode-single-mode (SSRMS) fiber structure. In the proposed design, the SR acts as a mode coupler and a sensing element, while the MMF functions as the narrow spectral width generator. The output power at narrow spectral response of the SSRMS sensor was monitored corresponding to different surrounding high refractive indices (SHRI). The experimental results revealed that the SSRMS sensor exhibited high sensitivity up to -293.40 dB/RIU for SHRI ranging from 1.450 to 1.531. The sensor is highly suitable for SHRI applications, such as for monitoring insulation oil in a power transformer.

引用

页码：63 / 66

页数：4

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