Spectral scanning-free measurement of Brillouin frequency shift using transient analysis

Eyal Preter; Orel Shlomi; Yosef London; Yair Antman; Avi Zadok

doi:10.1117/12.2236802

30 May 2016 Spectral scanning-free measurement of Brillouin frequency shift using transient analysis

Eyal Preter, Orel Shlomi, Yosef London, Yair Antman, Avi Zadok

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.

Citation Download Citation

Eyal Preter, Orel Shlomi, Yosef London, Yair Antman, and 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); https://doi.org/10.1117/12.2236802

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