Title :
Ultrahigh Sensitivity Refractive Index Sensor Based on Optical Microfiber
Author :
Ji, Wen Bin ; Liu, Huan Huan ; Tjin, Swee Chuan ; Chow, Kin Kee ; Lim, Anthony
Author_Institution :
Photonics Res. Center, Nanyang Technol. Univ., Singapore, Singapore
Abstract :
We demonstrate a nonadiabatic microfiber sensor with a taper diameter of few micrometers. The modal interference caused by the abrupt taper results in a sinusoidal spectral response. The wavelength shift arising because of the changes in the external refractive index is found to be significant, achieving a maximum sensitivity of 18681.82 nm/RIU. The measured results show good agreement with the theoretical predictions. The high sensitivity and the simplicity offer the sensor the potential for many real applications.
Keywords :
fibre optic sensors; light interference; refractive index measurement; modal interference; nonadiabatic microfiber sensor; optical microfiber; sinusoidal spectral response; ultrahigh sensitivity refractive index sensor; wavelength shift; Optical fiber sensors; Optical fibers; Optical interferometry; Optical refraction; Refractive index; Sensitivity; Microfiber; nonadiabatic taper; optical fiber; refractive index sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2217738
