Fujitsu Corporation

Kyousuke Sone

Paparao Palacharla

Inwoong Kim

Olga I Vassilieva

Shoichiro Oda

Yasuhiko Aoki

In an example, a method may include obtaining anomaly characteristics associated with an anomaly in a transmission medium in an optical transmission system. The anomaly may cause a degradation in one or more signal characteristics of an optical signal traversing the transmission medium. Based on the anomaly characteristics, the method may also include adjusting a first output power of a first optical amplifier that may be disposed at an input end of the transmission medium. Alternatively, or additionally, based on the anomaly characteristics, the method may also include adjusting a second output power of a second optical amplifier that may be disposed at an output end of the transmission medium.

Mitigation of anomaly loss in an optical transmission system

An optical network system capable of directly routing optical signals without entailing multiple reception of identical wavelengths. A set wavelength output unit outputs a set wavelength. An N-axis filter receives an N-axis signal propagated through a ring of an N-axis direction and an N-axis signal split inside the local node, and performs filtering by removing a wavelength identical with that of the N-axis signal from the N-axis signal and adding the wavelength of the N-axis signal to the N-axis signal. An N-axis splitter splits the N-axis signal into two, one being output to outside through the ring of the N-axis direction while the other being output, if k&#x3c;n, to a confluence with an N-axis signal, and, if k=n, to a wavelength separation filter. The filter separates a desired wavelength from the N-axis signal. Optical transmission media connect nodes so as to constitute an n-dimensional torus network.

Growing community of inventors

Kawasaki, Japan

Kyousuke Sone