Fujitsu Corporation

1Finity Inc.

Motohiko Eto

Paparao Palacharla

Inwoong Kim

Olga I Vassilieva

Shoichiro Oda

Setsuo Yoshida

Kazuyuki Tajima

Ryu Shinzaki

A method may include obtaining a first waveform corresponding to a first optical signal received at a first optical receiver via an optical link, and a second waveform profile corresponding to a second optical signal received a second optical receiver. The first waveform profile and the second waveform profile may be combined to form a combined waveform profile. A first reconstructed waveform profile that is an estimate of the first waveform profile and a second reconstructed waveform profile that is an estimate of the second waveform profile may be obtained. The first reconstructed waveform profile and the second reconstructed waveform profile may be combined to form a combined reconstructed waveform profile which may be emulated to obtain an emulated reconstructed waveform profile. A power profile estimation corresponding to the optical ink may be determined based on a comparison between the combined waveform profile and the emulated reconstructed waveform profile.

Multi-channel power profile estimation

A characteristics estimation device estimates characteristics of an optical fiber transmission line in an optical transmission system in which an optical signal is transmitted from first node to second node via the optical fiber transmission line. The characteristics estimation device includes a processor. The processor generates, based on electric field information indicating an electric field of the optical signal received by the second node via the optical fiber transmission line, a power profile indicating a relationship between power of the optical signal and dispersion amount corresponding to a transmission distance from the first node or the second node. The processor detects a span forming the optical fiber transmission line by using the power profile. The processor calculates, for the detected span, a dispersion coefficient of the optical fiber transmission line by dividing the dispersion amount estimated based on the power profile by a corresponding span length.

Device and method for estimating characteristics of optical fiber transmission line

Growing community of inventors

Kawasaki, Japan

Motohiko Eto