Abstract: An optical communication device includes: an optical switch configured to output an optical signal input from one transmission line to another transmission line among a plurality of transmission lines; and a control unit configured to control the optical switch such that a wavelength in accordance with a subscriber device and a transmission destination on a path of a communication destination is allocated to the subscriber device by using a control signal inserted or written by the control unit or a monitoring unit, and the input optical signal is output to the another transmission line corresponding to the communication destination.

Abstract: A determination unit determines whether non-compliant light that does not satisfy a predetermined criterion is included in multiplexed light passing through a path to be monitored. A restriction unit controls that an optical signal does not flow through the path when the non-compliant light is included in the multiplexed light.

Abstract: An optical communication device includes an optical switch that outputs an optical signal input from one of a plurality of transmission lines to another transmission line among the plurality of transmission lines, a monitoring unit that relays an optical signal in a transmission line on a side where the optical signal is output from the optical switch, a blocking unit that blocks transmission of an optical signal output from the monitoring unit, a wavelength controller that allocates a wavelength and the like that are a wavelength, a time, a polarization, a mode, a code, a frequency, a core, a core wire, or a combination thereof to an optical signal of a subscriber device via the monitoring unit, and an optical switch controller that controls the optical switch such that the optical signal input from the transmission line to the optical switch is output to the another transmission line, and cancels the blocking by the blocking unit.

Abstract: An aspect of the present invention is a separation system including a separation unit that separates a first signal having a first wavelength and a second signal having a second wavelength that is a wavelength excluding the first wavelength from an input optical signal, and a detection unit that detects intensity of the second signal.

Abstract: The semiconductor device includes a signal transmission element provided on an element structure in a high-withstand-voltage isolation region. The signal transmission element includes a primary coil that is provided on a side of a low potential region of the high-withstand-voltage isolation region and connected to the low potential region, and a secondary coil that is provided on a side of a high potential region of the high-withstand-voltage isolation region and connected to the high potential region. The primary coil and the secondary coil are magnetically coupled to each other by a magnetic field in a direction parallel to a main surface of a P type substrate.

Abstract: The control signal multiplexing device includes a modulation unit that performs polarization modulation of an optical signal for carrying a main signal with a control signal.

Abstract: In a semiconductor device, a first N-type diffusion layer is provided in a first high-side circuit region, and a second N-type diffusion layer is provided in a second high-side circuit region. Constituent elements for first and second high-side circuits are provided in the first and second N-type diffusion layers. An isolation trench is provided between the first N-type diffusion layer and the second N-type diffusion layer. The deepest portion of the isolation trench reaches a P-type substrate region of a P-type substrate. The first N-type diffusion layer and the second N-type diffusion layer are electrically isolated by the isolation trench having a buried insulating film inside.

Abstract: An optical switch includes a plurality of fifth ports and a plurality of sixth ports. A plurality of fifth ports of the optical switch are connected to a second ports of a first multiplexer-demultiplexer and a fourth ports of a second multiplexer-demultiplexer. A direction in which a wavelength component of a first wavelength out of an optical signal passing through the first port of the first multiplexer-demultiplexer travels and a direction in which the wavelength component of the first wavelength out of an optical signal passing through the third port of the second multiplexer-demultiplexer travels are opposite to each other.

Abstract: The wavelength adapter includes a first conversion unit, a first filter, a second conversion unit, and a second filter. The first conversion unit converts, by a first pump light, a first signal light into a second signal light having a wavelength not included in a target wavelength band while maintaining a phase relationship of the first signal light. The first filter blocks the first signal light and the first pump light, and allows for transmission of the second signal light. The second conversion unit converts, by a second pump light, the second signal light after transmission through the first filter into a third signal light having a wavelength in the target wavelength band while maintaining a phase relationship of the second signal light. The second filter blocks the second signal light and the second pump light, and allows for transmission of the third signal light.

Abstract: A service start method is a service start method executed by a communication system, and the service start method includes: a step of acquiring identification information or authentication information of a device, a customer, or a service; a step of making authentication of the device, the customer, or the service to succeed when the identification information or the authentication information has been acquired together with information that is associated with the customer or a customer's location in advance, or when the identification information or the authentication information has been acquired from a terminal or a line that is associated with the customer in advance; and a step of starting provision of the service for the device for which the authentication has succeeded.

Abstract: A semiconductor device includes: a substrate; a breakdown voltage holding insulating film; an element portion including a lower element and an upper element; a lead-out wire; a first electrode pad; a second electrode pad being one end portion of the upper element; and a top layer protective film covering the upper element so that the second electrode pad is exposed from a second contact hole. The breakdown voltage holding insulating film and the top layer protective film extend to a region outside the first electrode pad in a direction of extension of the lead-out wire. An electrically conductive pad double stack portion is disposed on an upper surface of the second electrode pad. The top layer protective film covers a peripheral portion of the pad double stack portion.

Abstract: A semiconductor device includes a first conductive portion provided on a part of a second semiconductor layer via a first insulating film, a second conductive portion provided on a part of a third semiconductor layer via a second insulating film, a first main electrode, and a second main electrode. When an ON control signal is input to one of the first conductive portion and the second conductive portion, conduction is established between the first main electrode and the second main electrode by a bipolar operation, and when the ON control signal is input to both the first conductive portion and the second conductive portion, conduction is established between the first main electrode and the second main electrode by a unipolar operation.

Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a sorting unit configured to acquire a signal that is transmitted by a first component and transmit the signal to a second component indicated by destination information that is added to the signal by the first component.

Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a platform for each component that realizes a function corresponding to a plurality of the networks, wherein the platform includes a common processing unit configured to execute processing that is not dependent on the network and a dependent processing unit for each network, the dependent processing unit being configured to execute processing that is dependent on the network.

Abstract: A communication device in a communication system in which functions that are converted to software are configured as a plurality of components, and the functions are realized as a result of the components being respectively executed by a plurality of communication devices that are connected to a network, the communication device including a capsulation function unit configured to encapsulate information that is to be transmitted to another communication device.

Abstract: An isolation region separates a first circuit region and a second circuit region. A signal conveyance element is an element to convey a signal from the first circuit region to the second circuit region and includes at least one primary coil and two secondary coils. The at least one primary coil has opposite ends electrically connected to the first circuit region and is disposed in the isolation region. The two secondary coils each have opposite ends electrically connected to the second circuit region, are arranged to be magnetically coupled to the at least one primary coil, and are arranged in the isolation region.

Abstract: One aspect of the present invention is a communication device including: a first control unit that converts, when data including partial data obtained by fragmenting a user frame and a user frame is received via a passive optical network, the partial data into data that is not discarded in a transmission line through which the user frame is transmitted, and transmits the data through the transmission line through which the user frame is transmitted; and a second control unit that receives the data via the transmission line through which the user frame is transmitted from the first control unit, converts the received data into a user frame that is transmittable through the passive optical network, and transmits the user frame via the passive optical network.

Abstract: A communication device includes: a first transmission-reception unit connected with a first optical line terminal; a second transmission-reception unit connected with a second optical line terminal; and a control unit, the first transmission-reception unit acquires a control signal having a destination at the second or third optical line terminal from the first optical line terminal, the control unit forwards the control signal toward the second transmission-reception unit connected with the second or third optical line terminal, and the second transmission-reception unit forwards the control signal to the second or third optical line terminal.

Abstract: An optical communication device includes: an optical switch configured to output an optical signal input from one transmission line to another transmission line among a plurality of transmission lines; and a control unit configured to control the optical switch such that a wavelength in accordance with a subscriber device and a transmission destination on a path of a communication destination is allocated to the subscriber device by using a control signal inserted or written by the control unit or a monitoring unit, and the input optical signal is output to the another transmission line corresponding to the communication destination.

Abstract: Provided is a semiconductor device including: an N-type diffusion layer being a second region, formed in a surface portion of a P-type diffusion layer being a first region, to function as a RESURF region; an N-type buried diffusion layer being a third region formed in a bottom portion of the second region, close to a high-side circuit; and a MOSFET using the second region as a drift layer. The MOSFET includes a thermal oxide film formed between an N-type diffusion layer being a fourth region serving as a drain region and an N-type diffusion layer being a sixth region serving as a source region, and an N-type diffusion layer being a seventh region formed below the thermal oxide film. The seventh region has an end portion close to a low-side circuit, being closer to the low-side circuit than an end portion of the third region close to the low-side circuit.