In this paper we present a giant-area fiber-optic gyroscope (GAFOG) combining a Raman distributed temperature sensor (RDTS) for metrological monitoring of Earth rotation rate fluctuations. The GAFOG exhibits sensitivity limits in Earth rotation sensing associated to temperature variations along the fiber. Distributed temperature measurements providing an accurate fiber temperature mapping, enable tracking of the signal phase drifts. This allows reduction of the phase noise at low Fourier frequencies, and a corresponding enhancement of the Earth rotation rate variation sensitivity beyond the currently achieved 2·nrad/s for integration times of 1000 s. © 2014 SPIE.

Giant-area fiber optic gyroscope with Raman-based temperature sensing for metrological applications / Bolognini, G.; Clivati, C.; Costanzo, G.; Frittelli, M.; Levi, F.; Mura, A.; Schiller, S.; Calonico, D.. - ELETTRONICO. - 9157:(2014). ((Intervento presentato al convegno 23rd International Conference on Optical Fibre Sensors tenutosi a Santander, esp nel 2014 [10.1117/12.2059316].

Giant-area fiber optic gyroscope with Raman-based temperature sensing for metrological applications

Costanzo G.;
2014

Abstract

In this paper we present a giant-area fiber-optic gyroscope (GAFOG) combining a Raman distributed temperature sensor (RDTS) for metrological monitoring of Earth rotation rate fluctuations. The GAFOG exhibits sensitivity limits in Earth rotation sensing associated to temperature variations along the fiber. Distributed temperature measurements providing an accurate fiber temperature mapping, enable tracking of the signal phase drifts. This allows reduction of the phase noise at low Fourier frequencies, and a corresponding enhancement of the Earth rotation rate variation sensitivity beyond the currently achieved 2·nrad/s for integration times of 1000 s. © 2014 SPIE.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2821364