Title :
Simultaneous measurement of refractive index and temperature using a single ultralong-period fiber grating
Author :
Zhu, Tao ; Rao, Yun-Jiang ; Mo, Qiu-Ju
Author_Institution :
Dept. of Optoelectronics Eng., Chongqing Univ., China
Abstract :
Novel ultralong-period fiber gratings (ULPFGs) with periods of up to several millimeters are reported here, which are fabricated by the high-frequency CO2 laser pulses exposure method. The experimental results show that the different resonant peaks of the ULPFG have different temperature and refractive index sensitivities. In addition, it is found that different resonant peaks of the ULPFG have quite different sensitivities to refractive index. Hence, this offers the potential for realizing simultaneous measurement of refractive index and temperature.
Keywords :
Bragg gratings; fibre optic sensors; laser materials processing; optical fibre fabrication; refractive index measurement; temperature measurement; CO2; CO2 laser pulse exposure method; refractive index measurement; resonant peaks; temperature measurement; ultralong-period fiber grating; Diffraction gratings; Erbium-doped fiber lasers; Fiber gratings; Optical fiber sensors; Optical fibers; Optical pulses; Refractive index; Resonance; Strain measurement; Temperature sensors; optical fiber sensors; refractive index measurement; ultralong-period fiber gratings (ULPFGs);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859400
