A simple and robust refractive index (RI) sensor based on a Mach-Zehnder interferometer has been demonstrated. A section of optical microfiber drawn from silica fiber is employed as the sensing arm. Because of the evanescent field, a slight change of the ambient RI will lead to the variation of the microfiber propagation constant, which will further change… (More)
A novel microstructure based temperature sensor system using hybrid wavelength-division-multiplexing /frequency-division-multiplexing (WDM/FDM) is proposed. The sensing unit is a specially designed microstructure sensor both frequency and wavelength encoded, as well as low insertion loss which makes it have the potential to be densely multiplexed along one… (More)
A novel temperature sensor based on fiber Bragg grating (FBG) in micro/nanofiber (MNF) immerged in the refractive index oil with high thermo-optic coefficient is proposed and simulated. A sensitivity of 0.4168nm/°C can be achieved.