Abstract
This work reports a refractive index sensor made of plastic optical fiber (POF) with tapered structure. Transmission loss is measured when the external environment’s refractive index changes from 1.33 to 1.41. Three wavelengths (532, 633, and 780 nm) are used to evaluate the sensitivity of the sensor, and results indicate that 633 nm is the best sensing wavelength due to the increased levels of sensitivity achieved at this wavelength. A biconical sensing structure is designed to enhance the sensitivity of the sensor. A sensitivity of at 633 nm is obtained for a biconical sensing structure when launched power is 1 mW. Due to its sensitivity to the refractive index and simple construction, POF with tapered structure has potential applications in the biosensing field.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Chuanxin Teng, Ning Jing, Fangda Yu, Yue Ding, and Jie Zheng
Appl. Opt. 56(7) 1833-1838 (2017)
Ning Jing, Jie Zheng, Xiaowei Zhao, and Chuanxin Teng
Appl. Opt. 53(34) 8145-8150 (2014)
T. K Yadav, R. Narayanaswamy, M. H. Abu Bakar, Y. Mustapha Kamil, and M. A. Mahdi
Opt. Express 22(19) 22802-22807 (2014)