30 May 2016 Spectral scanning-free measurement of Brillouin frequency shift using transient analysis
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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162K (2016) https://doi.org/10.1117/12.2236802
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland
Abstract
The scanning-free, precise reconstruction of the local value of the Brillouin frequency shift in a section of optical fiber is proposed and demonstrated experimentally. The Brillouin shift is identified based on transient analysis of the step response of the amplified signal wave. The measurement protocol requires a single trace, taken at an arbitrary frequency offset between the central optical frequencies of the pump and signal waves. The frequency offset may be chosen anywhere within ±100 MHz of the Brillouin frequency shift, corresponding to a measurement range of ±100 °C or ±2,000 μepsilon. The experimental error between the estimated Brillouin shift and its true value is less than±1 MHz. The protocol is suitable to high-resolution Brillouin optical correlation domain analysis.
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Eyal Preter, Eyal Preter, Orel Shlomi, Orel Shlomi, Yosef London, Yosef London, Yair Antman, Yair Antman, Avi Zadok, Avi Zadok, } "Spectral scanning-free measurement of Brillouin frequency shift using transient analysis", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162K (30 May 2016); doi: 10.1117/12.2236802; https://doi.org/10.1117/12.2236802
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