Abstract

We propose a simple intrinsic Fabry–Perot interferometer (FPI) based on single-mode fiber, where a thin film is formed by arc discharge to serve as one mirror of the FPI cavity. The temperature and refractive-index (RI) characteristics of the proposed device are investigated. Experimental results show that the device can provide temperature-independent measurement of RI with a fringe-contrast sensitivity of 72.59dB/RIU (RI units). Meanwhile, it can also be used as a temperature sensor with a wavelength sensitivity of 8pm/°C. Therefore, the potential simultaneous measurement of RI and temperature could be realized by detecting the variations of fringe contrast and wavelength, respectively.

© 2013 Optical Society of America

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