Abstract: A light monitoring device according to the present disclosure comprises: a light spectrum generator that generates the light spectrum information of propagating light that propagates via a light path switching device for switching signal light paths; an identified-light information generator that generates, from the light spectrum information, identified-light information related to the spectrum form of identified light included in the propagating light; and a switching state determiner that determines the switching state of the light path switching device from the identified-light information.

Abstract: A light source device of the present invention includes: a light generation circuit that generates amplified spontaneous emission; a beam splitting circuit that splits the amplified spontaneous emission into a plurality of split light beams; and a light control circuit that controls the band and power of at least one of the plurality of split light beams to generate a waveform-shaped split light beam.

Abstract: Since it is difficult to constantly monitor a large number of unused fiber optic transmission lines in an optical submarine cable system, a light source device according to the present invention includes: a light generation unit for generating amplified spontaneous emission light; a light control unit for controlling the band and power of the amplified spontaneous emission light and generating waveform shaping spontaneous emission light; and an optical branching unit for branching the waveform shaping spontaneous emission light into a plurality of branched light beams.

Abstract: To provide a means that can notify a user, of a sub-band of a wavelength-multiplexed optical signal, regarding the occurrence of a problem, a notification system comprising: a detection means that receives a wavelength-multiplexed optical signal including a plurality of optical signals, and on the basis of an intensity of an optical signal in a sub-band allocated to the wavelength-multiplexed optical signal, detects the optical intensity in the sub-band; an identification means which, on the basis of the optical intensity in the sub-band, identifies a sub-band in which a problem has occurred; and a notification means that provides notification of the occurrence of the problem to a notification destination associated with the identified sub-band.

Abstract: An object is to provide an optical transmission apparatus in which dummy lights can be arranged according to an arrangement of optical signals. A plurality of optical signals of different frequencies arranged in a frequency grid are input to a multiplexing unit and the multiplexing unit multiplexes the input optical signals. A dummy light output unit identifies a dummy light to be arranged in the frequency grid based on the plurality of optical signals and outputs the dummy light. A multiplexing unit multiplexes an optical signal multiplexed by the multiplexing unit and the dummy light output from the dummy light output unit to output a wavelength-multiplexed optical signal L.

Abstract: An object is to provide an optical transmission apparatus in which dummy lights can be arranged according to an arrangement of optical signals. A plurality of optical signals of different frequencies arranged in a frequency grid are input to a multiplexing unit and the multiplexing unit multiplexes the input optical signals. A dummy light output unit identifies a dummy light to be arranged in the frequency grid based on the plurality of optical signals and outputs the dummy light. A multiplexing unit multiplexes an optical signal multiplexed by the multiplexing unit and the dummy light output from the dummy light output unit to output a wavelength-multiplexed optical signal L.