Response Characterization of a Fiber Optic Sensor Array with Dye-Coated Planar Waveguide for Detection of Volatile Organic Compounds

Sensors

Jae-Sung Lee⁵  Na-Rae Yoon⁴  Byoung-Ho Kang²  Sang-Won Lee⁵  Sai-Anand Gopalan⁵  Hyun-Min Jeong⁵  Seung-Ha Lee³  Dae-Hyuk Kwon¹ 

[1] Department of Electronics Engineering, Kyungil University, Hayang-up, Gyeongsang buk-do 712-702, Korea; E-Mail:;Center for Functional Devices Fusion Platform, Kyungpook National University, 1370 Sankyuk-dong, Bukgu, 702-701 Daegu, Korea; E-Mail:;Department of Biomedical, School of Medicine, Dankook University, 119, Dandae-ro, Dongnam-gu, cheonan-si, 330-714 Chungnam, Korea; E-Mail:;Department of Sensor and Display Engineering, Kyungpook National University, 1370 Sankyuk-dong, Bukgu, 702-701 Daegu, Korea; E-Mail:;School of Electronic Engineering, College of IT Engineering, Kyungpook National University, 1370 Sankyuk-dong, Bukgu, 702-701 Daegu, Korea; E-Mails:

关键词: volatile organic compounds;    side-polished optical-fiber;    solvatochromic dye;    multi-array;    gas-sensing;    principal component analysis;   

DOI  :  10.3390/s140711659

来源: mdpi

【 摘 要 】

We have developed a multi-array side-polished optical-fiber gas sensor for the detection of volatile organic compound (VOC) gases. The side-polished optical-fiber coupled with a polymer planar waveguide (PWG) provides high sensitivity to alterations in refractive index. The PWG was fabricated by coating a solvatochromic dye with poly(vinylpyrrolidone). To confirm the effectiveness of the sensor, five different sensing membranes were fabricated by coating the side-polished optical-fiber using the solvatochromic dyes Reinhardt's dye, Nile red, 4-aminophthalimide, 4-amino-N-methylphthalimide, and 4-(dimethylamino)cinnamaldehyde, which have different polarities that cause changes in the effective refractive index of the sensing membrane owing to evanescent field coupling. The fabricated gas detection system was tested with five types of VOC gases, namely acetic acid, benzene, dimethylamine, ethanol, and toluene at concentrations of 1, 2,…,10 ppb. Second-regression and principal component analyses showed that the response properties of the proposed VOC gas sensor were linearly shifted bathochromically, and each gas showed different response characteristics.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland