Optical EngineeringDispersion compensation and crosstalk reduction in a bidirectional dense wavelength division multiplexing cable television system
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We propose and demonstrate a bidirectional dense wavelength division multiplexing cable television system that uses large effective area fibers (LEAFs) as transmission fibers and chirped fiber grating (CFG) as a dispersion compensation device to reduce the dispersion and cross-phase modulation (XPM)-induced crosstalk. By comparing the system link with the transmission length of a 50-km single-mode fiber (SMF) without CFG, good performances of carrier-to-noise ratio (CNR) ≥ 50 dB, a composite second order (CSO) ≥ 69 dB, and a composite triple beat (CTB) ≥ 66 dB are obtained in our proposed system over a 50-km LEAF transport.