Coherent Rayleigh Backscatter Phase Noise in Digitally Enhanced Fiber Interferometers
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Bandutunga, Chathura
Zhang, Ya
McRae, Terry
Gray, Malcolm
Chow, Jong
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Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
The coupling of Rayleigh backscatter induced phase noise in bi-directional, inline fiber interferometers compromises detection sensitivity for Fourier frequencies less than 1 Hz. Here we report experimental and theoretical work highlighting the coupling of backscatter phase noise, and its subsequent range-gating and suppression using digitally enhanced homodyne interferometry. Between two in-line fiber interferometers, each with a differential arm-length of 8 km, we demonstrate a relative stability of 10 Hz/√Hz at a Fourier frequency of 100 mHz.
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Journal of Lightwave Technology
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Restricted until
2099-12-31