Abstract: An optical node device to which a first subscriber device and a second subscriber device are connected in an optical communication system in which the first subscriber device and the second subscriber device are mixed, the first subscriber device being connected by one core using different wavelengths in transmission and reception, the second subscriber device being connected by two cores using the same wavelength in transmission and reception, the optical node device including: a transmission/reception separator that transfers an optical signal transmitted from the first subscriber device and an optical signal addressed to the first subscriber device without interference; and an optical switch that controls a connection relationship between ports such that an optical signal transmitted from the first subscriber device or an optical signal addressed to the first subscriber device passes through the transmission/reception separator and an optical signal transmitted from the second subscriber device or an optic

Abstract: An aspect of the present invention is an optical transmission device including a connector that is able to be connected to an accommodation module accommodating an optical fiber such that optical communication is performed, an optical switch that receives an optical signal from the connector and outputs an optical signal to the connector, an optical switch controller that controls the optical switch, an up wavelength multiplexer/demultiplexer that multiplexes light of a plurality of wavelengths output from the optical switch and outputs the multiplexed light to a transmission line, and a down wavelength multiplexer/demultiplexer that demultiplexes light input from the transmission line and outputs the demultiplexed light to the optical switch, wherein the connector can be connected to any one of a one-core accommodation module and a two-core accommodation module as the accommodation module.

Abstract: Provided is a communication system in which at least a master unit of the master unit and a slave unit is driven by a finite power source, in which the master unit notifies the slave unit by including period information indicating a shortest sleep period, which is a shortest possible period of a sleep period, in a communication signal with the slave unit before transitioning to a sleep state in which a power saving operation is possible and communication is disabled, with respect to the sleep period of operating in the sleep state after transitioning to the sleep state, and the slave unit performs a power saving operation during the shortest period notified of by the master unit.

Abstract: An optical transmission apparatus includes: a distributing unit which distributes a laser beam based on a first oscillation frequency; a phase modulator which generates, using the laser beam based on the first oscillation frequency, a phase-modulated signal that is an optical signal phase-modulated in accordance with a modulated signal; a multiplexing unit which multiplexes a laser beam based on a second oscillation frequency and the phase-modulated signal; a detecting unit which generates a frequency-modulated signal by performing detection processing on a result of multiplexing of the laser beam based on the second oscillation frequency and the phase-modulated signal; and an intensity modulator which generates, using the laser beam based on the first oscillation frequency, an optical signal intensity-modulated in accordance with the frequency-modulated signal.

Abstract: An optical transmission apparatus includes an input unit, a demultiplexing unit, a measurement unit, and a switching unit. The input unit inputs a first multiplexed signal and a second multiplexed signal each obtained by multiplexing a plurality of optical signals having different wavelengths. The demultiplexing unit demultiplexes the first multiplexed signal and the second multiplexed signal by wavelength. The measurement unit measures qualities of a plurality of optical signals obtained by demultiplexing the first multiplexed signal and qualities of a plurality of optical signals obtained by demultiplexing the second multiplexed signal. The switching unit performs switching between the first multiplexed signal and the second multiplexed signal to be output to a subsequent stage based on a result of measurement by the measurement unit.

Abstract: An optical communication device includes: a control signal generation unit that generates, on the basis of a communication log, a sleep cancellation signal including information about at least one time at which communication with a terminal device performing wireless communication with a power-receiving optical communication device is expected to be successful, the communication log including information about a result of communication at a time when sleep state cancellation is performed on the power-receiving optical communication device that is driven by electrical power obtained from an optical signal for power supply; and an optical communication unit that converts the generated sleep cancellation signal into an optical signal, and transmits the optical signal to the power-receiving optical communication device.

Abstract: There is provided a signal amplification method executed by an optical reception device, the method including: an electrical conversion step of converting an optical intensity modulation signal according to a frequency modulation signal which is converted from a frequency division multiplexing signal into the frequency modulation signal; a delay control step of controlling a delay amount of the frequency modulation signal based on a center frequency of the frequency modulation signal and a shift amount of a highest frequency of the frequency modulation signal; a delay detection step of demodulating the frequency modulation signal into the frequency division multiplexing signal by executing demodulation processing based on delay detection on the frequency modulation signal of which the delay amount is controlled; an amplification factor derivation step of deriving an amplification factor of the demodulated frequency division multiplexing signal based on the delay amount; and an amplification step of amplifying

Abstract: A battery system incudes battery stack formed by stacking a plurality of battery cells and cooling plate thermally coupled to battery cell of battery stack. Heat insulating material is disposed between battery cells of battery stack, which are adjacent to each other, and heat insulating material insulates heat between battery cells adjacent to each other. In addition, cooling plate cools battery cell, is used in combination with an endothermic material having heat capacity to absorb thermal runaway energy of battery cell, and prevents induction of thermal runaway.

Abstract: A first communication device, transmits a startup instruction signal and a second communication device restarts supply of power that has been stopped in a sleep state when receiving the startup instruction signal from the first communication device and includes transmission data in a startup completion signal when generating the start completion signal that is a response signal to the startup instruction signal.

Abstract: An optical power feeding device including a photodiode array having a same number of photodiodes as a number of cores included in a multicore fiber, in which each of light receiving surfaces of the respective photodiodes faces a corresponding one of the cores of the multicore fiber, and at least the two photodiodes are connected in series to a power feeding target.

Abstract: An optical transmission device includes: a first optical phase modulator that outputs a first optical signal by phase-modulating the laser beam having a first oscillation frequency according to the first electric signal in a case where the first electric signal is output to the first transmission path, a second optical phase modulator that outputs a laser beam having a second oscillation frequency as the second optical signal in a case where the first electric signal is output to the first transmission path; an optical multiplexer/distributor that outputs a third optical signal and a fourth optical signal by multiplexing the first optical signal and the second optical signal and distributing a result of the multiplexing; a first detection unit that converts the third optical signal into a first heterodyne detection signal; a second detection unit that converts the fourth optical signal into a second heterodyne detection signal; and a first optical intensity modulator that intensity-modulates a laser beam havi

Abstract: An optical communication system includes an optical line terminal and a plurality of optical network units connected by optical transfer paths. The optical line terminal includes a light transmitting/receiving unit and a control unit. The light transmitting/receiving unit transmits/receives an optical signal to/from the plurality of optical network units via the optical transfer paths. The control unit performs control to change a launch power of an optical signal transmitted from the light transmitting/receiving unit, such that, when, regarding at least one optical network unit, a monitoring value has changed to a value indicating deterioration, a receive power of an optical signal in each of the plurality of optical network units is lower than or equal to an upper limit value and a receive power of an optical signal in the optical network unit in which the monitoring value has changed is higher than or equal to a lower limit value.

Abstract: The laser welding device includes a laser transmission window and a gas injection nozzle. The gas injection nozzle includes an optical path hole and an injection unit that injects an inert gas for shielding metal vapor into the optical path hole toward an irradiation direction side and an optical axis side of a laser beam.

Abstract: An optical transmission apparatus of an embodiment is an apparatus for redundantly transmitting a multiplexed signal obtained by multiplexing N (N is an integer of 2 or greater) optical signals having different wavelengths, the apparatus including: a first demultiplexing unit to which a first multiplexed signal is input, the first demultiplexing unit configured to demultiplex the input first multiplexed signal into the N optical signals; N first detection units to which the N optical signals demultiplexed by the first demultiplexing unit are respectively input, each of the N first detection units configured to detect presence or absence of deterioration of a corresponding input optical signals of the input optical signals based on a signal level of the corresponding input optical signal; a second demultiplexing unit to which a second multiplexed signal is input, the second demultiplexing unit configured to demultiplex the input second multiplexed signal into the N optical signals; N second detection units to

Abstract: An optical transmission device includes: an FM batch conversion unit that performs FM batch conversion on a carrier signal input from the outside, to generate an FM batch conversion signal; a signal branching unit that causes the FM batch conversion signal to branch into a first path and a second path; an optical transmission unit that is provided in the first path, converts the FM batch conversion signal into an optical signal, and transmits the optical signal to the outside; and a detection unit that is provided in the second path, and detects quality degradation of the FM batch conversion signal on the basis of the signal level of the FM batch conversion signal.

Abstract: An optical power supply system comprising: a power supply optical communication device that supplies power using an optical signal for power supply; and a power reception optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communication device, wherein the power supply optical communication device includes an optical power supply unit that transmits the optical signal for power supply to the power reception optical communication device, and an optical signal generation unit that converts a continuous wave used for frequency conversion of a radio signal received by the power reception optical communication device into an optical signal and transmits the optical signal to the power reception optical communication device, the power reception optical communication device includes a photoelectric conversion unit that converts the optical signal transmitted from the power supply optical communication device into an electric

Abstract: An optical power supply system includes a power supply optical communication device that supplies power using an optical signal for power supply and a power reception optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communication device, wherein the power supply optical communication device includes an optical power supply unit that transmits the optical signal for power supply to the power reception optical communication device and a data transmission/reception unit that transmits the optical signal for power supply to the power reception optical communication device when there is no data to be transmitted to the power reception optical communication device, and the power reception optical communication device includes a power storage unit that stores power obtained based on the optical signal for power supply transmitted from the optical power supply unit and the optical signal for power supply transmitted from t

Abstract: An optical power supply system, comprising: a power supply optical communication device that supplies power using an optical signal for power supply; and a power receiving optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communication device, wherein the power supply optical communication device includes an optical power supply unit that transmits the optical signal for power supply to the power receiving optical communication device, when there is data to be transmitted to the power receiving optical communication device, transmit a sleep control signal having a shape corresponding to the time length of the data or having a shape with high noise resistance, to cancel a sleep state of a part of function units of the power receiving optical communication device, to the power receiving optical communication device, and the power receiving optical communication device includes a signal detection unit that detects the

Abstract: A higher-level device in an optical access system including: the higher-level device; a transition source subscriber line terminal station device before device replacement, the transition source subscriber line terminal station device communicating with the higher-level device and one or more subscriber line terminal devices; and a transition destination subscriber line terminal station device that is a device replacement destination, the higher-level device including a transfer control unit that transfers, in a case where data transmitted from the transition destination subscriber line terminal station device is received at a time of device replacement, to the transition destination subscriber line terminal station device, data addressed to one of the subscriber line terminal devices that is a transmission source of the data transmitted from the transition destination subscriber line terminal station device.

Abstract: A power supply side optical communication apparatus supplies power to a power receiving side optical communication apparatus using an optical signal for power supply, a power storage unit stores the supplied power, a data control unit of the power supply side optical communication apparatus superimposes data transmission/reception control information related to transmission/reception of data transmitted/received by a data transmission/reception unit on the optical signal for power supply, a control information detection unit detects the data transmission/reception control information superimposed on the optical signal for power supply, and a power supply control unit detects presence or absence of transmission and reception of the data in an optical transmission/reception unit and an external transmission/reception unit on the basis of the data transmission/reception control information detected by the control information detection unit and data stored in a data storage unit, and supplies the power stored in