title: Optical diversity transmission using WDM signal and phase-conjugate lights through multi-core fiber.
abstract: This paper proposes a maximum-ratio combining (MRC) scheme for a WDM signal and phase-conjugate pair (PCP) diversity transmission to cancel nonlinear phase-shift. A transfer function approximation for nonlinear phase-shift cancellation is formulated. It shows, with the help of a numerical calculation, that span-by-span chromatic dispersion compensation is more effective than the lumped equivalent at the receiver. This is confirmed in a 2-core diversity 5 channel WDM transmission experiment over 3-spans of 60km MCF with 25 Gbit/s-QPSK PCP. The peak Q-value was enhanced by 3.6dB through MRC, resulting in superior bitrate-distance product and optical power density limit, compared to twice the single core transmission.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Koga
authors.forename: Mitsuki
authors.initials: M
authors.lastname: Moroi
authors.forename: Hidehiko
authors.initials: H
authors.lastname: Takara