EFFECTS OF LASER PHASE NOISE ON THE OPERATION OF COHERENT REFLECTOMETERS WHEN USING FIBERS WITH ARRAYS OF ARTIFICIAL REFLECTORS
E.A. Fomiryakov1,2, D.M. Bengalskii1, D.R. Kharasov1, O.E. Nanii1,2,3, S.P. Nikitin1,4, V.N. Treshchikov1,3
1Т8 Sensor, LLC, Moscow, Russia
2M.V. Lomonosov Moscow State University, Moscow, Russia
3Т8, LLC, Moscow, Russia
4FemtoVision, LLC, Moscow, Russia
Keywords: sensors, fiber-optic systems, heterodyning, Rayleigh coherent reflectometers
Abstract
A review of major noise processes affecting the operation of phase-sensitive coherent reflectometers is given. The overview may be useful for educational purposes. The measurement results obtained using modified single-mode fibers with artificial scatterers distributed along the fiber length are presented. The advantages of such fibers over the standard single mode fibers are demonstrated and analyzed. The relationship between the phase noise of the reflectometer signal and that of the probing laser is shown.
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