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Ralph POSEY, Jr. Sandeep T. VOHRA Alan B. TVETEN
Simultaneous measurements of temperature and strain were demonstrated by measuring the stimulated Brillouin scattering frequency shift and gain in two separate types of optical fibers: dispersion shifted and special GeO2-doped optical fiber. This novel approach allows for a hybrid frequency division and time division multiplexing scheme for developing advanced distributed strain sensing. The preliminary measurements show a temperature resolution of approximately 1.6 and a strain resolution of 32 µε.