Mitsubishi Electric Corporation

Yuita Noguchi

Naoki Suzuki

There are included: a light source () that outputs pulsed light; an optical splitter () that splits the pulsed light output from the light source () and outputs the split pulsed light from each of a plurality of second ports; a plurality of VOAs () that is each connected to a corresponding one of the second ports of the optical splitter (), and attenuates and outputs the pulsed light input from the optical splitter (); a plurality of optical couplers () each of whose first port is connected to output of a corresponding one of the VOAs () and each of whose second port is connected to one end of a corresponding one of a plurality of transmission lines () to be measured; a light receiving element () that receives backscattered light from the one end of each of the transmission lines (); a power adjustment unit () that individually controls each of the VOAs (); and a data processing unit () that performs abnormality detection on each of the transmission lines () from a result of light reception by the light receiving element ().

Multi-degree monitoring apparatus

An optical relay device includes a WSS functioning as a wavelength selective switch capable of performing path switching in wavelength units and optical level adjustment for each of wavelengths and a control device that instructs, on the basis of a fluctuation amount of an optical level for each of the wavelengths of an optical signal output from the WSS and setting information indicating, for each of the wavelengths, whether optical level adjustment for the wavelengths of the optical signal is enabled, the WSS to perform a setting change of an optical level adjustment amount of the optical signal.

Growing community of inventors

Tokyo, Japan

Yuita Noguchi