Title :
Singlemode hetero-core fiber based refractometer demodulated in a ratiometric system
Author :
Wu, Qiang ; Ma, Youqiao ; Bo, Lin ; Wang, Pengfei ; Semenova, Yuliya ; Farrell, Gerald
Author_Institution :
Photonics Res. Center, Dublin Inst. of Technol., Dublin, Ireland
Abstract :
We propose a fiber refractometer based on a singlemode-small core singlemode (SCSMF)-singlemode (SMF28-SCSMF-SMF28) structure demodulated by a ratiometric measurement system. Both the SMF28 and SCSMF fibers have a step index profile and the conventional SMF28 fiber is used at both ends as the attaching fiber to the small core SMF fiber. By measuring the power variations at the output of the refractometer, the surrounding refractive index (SRI) can be determined. Experiments demonstrate a maximum RI sensitivity of 1.55×10-5 in the SRI range from 1.3340 to 1.4485.
Keywords :
fibre optic sensors; refractive index; refractometers; ratiometric system; singlemode hetero-core fiber based refractometer; step index profile; surrounding refractive index; Optical fiber communication; Optical fiber sensors; Optical fibers; Refractive index;
Conference_Titel :
Sensors, 2011 IEEE
Conference_Location :
Limerick
Print_ISBN :
978-1-4244-9290-9
DOI :
10.1109/ICSENS.2011.6127258
