Title :
Temperature Robust Refractive Index Sensor Based on a Photonic Crystal Fiber Interferometer
Author :
Park, Kwan Seob ; Choi, Hae Young ; Park, Seong Jun ; Paek, Un-Chul ; Lee, Byeong Ha
Author_Institution :
Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., Gwangju, South Korea
fDate :
6/1/2010 12:00:00 AM
Abstract :
We present a simple photonic crystal fiber (PCF)-based reflection type interferometer insensitive to temperature for refractive-index measurement. By simply collapsing the airholes at a middle point and forming a reflector at the end of a PCF, the interferometer could be implemented. The PCF sensor showed a low thermal sensitivity even without any compensation process. The feasibility as a refractive-index sensor is demonstrated by presenting the spectral response to liquids having various refractive indexes and to temperature. The implemented sensor showed a good sensitivity of 850 nm/RUI (refractive unit index).
Keywords :
fibre optic sensors; holey fibres; light interferometers; photonic crystals; refractive index measurement; photonic crystal fiber interferometer; refractive index measurement; temperature robust refractive index sensor; Liquids; Optical refraction; Optoelectronic and photonic sensors; Photonic crystal fibers; Reflection; Refractive index; Robustness; Temperature measurement; Temperature sensors; Thermal sensors; External refractive index (ERI); low-temperature cross sensitivity; photonic crystal fiber (PCF);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2037510
