ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection

被引：5

作者：

Johari, Siti Halma ^{[1
,2
]}

Cheak, Tiu Zian ^{[3
]}

Rahim, Hazli Rafis Abdul ^{[4
]}

Jali, Mohd Hafiz ^{[5
]}

Yusof, Haziezol Helmi Mohd ^{[4
]}

Johari, Md Ashadi Md ^{[2
]}

Yasin, Moh ^{[6
]}

Harun, Sulaiman Wadi ^{[1
,6
]}

机构：

[1] Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia

[2] Univ Teknikal Malaysia Melaka, Fac Elect & Elect Engn Technol, Melaka 76100, Malaysia

[3] INTI Int Univ, Fac Engn & Quant Surveying, Nilai 71800, Negeri Sembilan, Malaysia

[4] Univ Teknikal Malaysia Melaka, Fac Elect & Comp Engn, Melaka 76100, Malaysia

[5] Univ Teknikal Malaysia Melaka, Fac Elect Engn, Melaka 76100, Malaysia

[6] Airlangga Univ, Fac Sci & Technol, Dept Phys, Surabaya 60231, Indonesia

来源：

PHOTONICS | 2022年 / 9卷 / 11期

关键词：

evanescence wave sensor; tapered plastic optical fiber; zinc oxide nanorods; humidity sensing; SENSITIVITY OPTIMIZATION; SENSOR; RESONATOR; PERFORMANCE; GROWTH;

D O I：

10.3390/photonics9110796

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods were synthesized using a hydrothermal method and grown on the POF by a seeding process for 12 h. A significant response of the sensor was observed when the sensor was exposed to 35 to 90%RH due to the intense chemisorption process and changeable relative index in the POF. The sensitivity and resolution of the sensor have been improved by factors of 1.23 and 2.18, respectively, compared to the conventional tapered POF sensor without ZnO coating. Besides, the ZnO-coated sensor also exhibited better repeatability properties in terms of output voltage when exposed to 35 to 90%RH for three repeated measurements. The obtained results revealed that the proposed new POF sensor has an excellent sensing performance as an RH sensor in terms of sensitivity, repeatability, and stability properties.

引用

页数：12

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