Evaluation of Rayleigh scattering loss in photonic crystal fibers by using bi-directional OTDR measurement

Modal Dependence of Rayleigh Scattering Coefficients Based on the Bidirectional Otdr Technique

“…This concept was demonstrated experimentally in 1982 and the local attenuation coefficient and the local backscattering factor have hence been measured separately [11]. Since then, multiple studies have reported the comparison of the Rayleigh scattering coefficients of two SMF spliced together [9,12,13]. It appears that a bidirectional measurement is sufficient to extract the backscattering factor of a mode for a given fiber.…”