Title :
Highly accurate refractive index sensor based on Fourier-transformed phase acquisition in fiber-optic interferometer
Author :
Young Ho Kim ; Kwan Seob Park ; Byeong Ha Lee ; Seok Lee ; Deok Ha Woo ; Young-Tak Chough
Author_Institution :
Sch. of Inf. & Commun., Gwanju Inst. of Sci. & Technol., Gwangju, South Korea
Abstract :
High precision refractive index (RI) measurement was achieved by utilizing the phase term of a Fourier-transformed interference signal. With a fiber-optic Fabry-Perot RI sensor, it was verified that the proposed method had high resolving performance in RI determination compared with the conventional wavelength tracing method. Even with a tiny variation in liquid RI, the Fourier-transformed phase shift showed high accuracy as much as 0.99995 of R square value.
Keywords :
Fabry-Perot interferometers; Fourier transforms; fibre optic sensors; refractive index measurement; Fourier-transformed phase acquisition; R square value; RI measurement; fiber-optic Fabry-Perot RI sensor; fiber-optic interferometer; phase shift; refractive index measurement; refractive index sensor; signal interference; wavelength tracing method; Ethanol; Interference; Optical fiber sensors; Optical interferometry; Refractive index; Wavelength measurement; Fiber-optic sensors; High precision measurement; Refractive index sensors;
Conference_Titel :
Sensing Technology (ICST), 2013 Seventh International Conference on
Conference_Location :
Wellington
Print_ISBN :
978-1-4673-5220-8
DOI :
10.1109/ICSensT.2013.6727714
