Abstract
An optical fiber sensor based on the change of optical confinement in a subwavelength tip is presented. The optical spot is substantially increased when the environmental refractive index (RI) increases from 1.3 to 1.4. By measuring the intensity of low angular spectral components, an intensity sensitivity up to 8000% per RI unit is achieved. The fiber tip sensors take advantage of the small detection volume and real-time responses. We demonstrate the application of the nanofiber sensors for measuring concentrations of acids and evaporation rates of aqueous mixtures.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Chunyu Lu, Hamed Nikbakht, M. Yusuf Erdolu, Bob van Someren, and B. Imran Akca
Opt. Lett. 47(23) 6281-6284 (2022)
Vivek Semwal and Banshi D. Gupta
Appl. Opt. 58(15) 4149-4156 (2019)
Dejun Liu, Arun Kumar Mallik, Jinhui Yuan, Chongxiu Yu, Gerald Farrell, Yuliya Semenova, and Qiang Wu
Opt. Lett. 40(17) 4166-4169 (2015)