title: In-series double cladding fibers for simultaneous refractive index and temperature measurement.
abstract: A fiber-optic sensor for simultaneous measurement of refractive index (RI) and temperature was proposed and demonstrated. It was fabricated by cascading two sections of specialty double cladding (DC) fibers which presented a pair of well-separated resonant spectra dips. The sensing properties of temperature and ambient RI were investigated theoretically based on the coupled mode theory. Experimental results indicated that these two resonant spectra shifts were linearly dependent on the variation of the RI in the range of 1.3333 approximately 1.4118 and on the temperature in the range of -10 degrees C approximately + 80 degrees C. Such a fiber-optic sensor is simple and easy for mass production and has potential applications for biosensors or chemical sensors.
authors.affiliation: The Key Lab of Specialty Fiber Optics and Optical Access Networks, Shanghai University, NO 149 Yanchang Road, Shanghai, 200072, PR China.
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Liu
authors.forename: Fufei
authors.initials: F
authors.lastname: Pang
authors.forename: Hairui
authors.initials: H
authors.lastname: Guo
authors.forename: Wenxin
authors.initials: W
authors.lastname: Cao
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Liu
authors.forename: Na
authors.initials: N
authors.lastname: Chen
authors.forename: Zhenyi
authors.initials: Z
authors.lastname: Chen
authors.forename: Tingyun
authors.initials: T
authors.lastname: Wang