Abstract: Systems, devices, and techniques relating to optical communications are described. A described hub optical module includes an optical transceiver configured to communicate with edge optical modules of respective edge devices via an optical communication network, the edge optical modules comprising edge interfaces; and a controller coupled with the optical transceiver. The controller can be configured to provide, to a hub device, hub interfaces which are configurable to respectively correspond to different optical subcarriers transmitted from and received by the optical transceiver. The controller can advertise, to the hub device, an application select code to enable the hub device to configure an operational mode and to selectively enable each of the hub interfaces in the operational mode, store one or more associations among the hub interfaces and the edge interfaces, and configure one or more cross-connections among the hub interfaces and the optical subcarriers based on the one or more associations.

Abstract: Synchronizing a pulse position modulation (PPM) signal. A method includes performing a first synchronization operation by receiving a first series of symbols. The symbols in the first series are transmitted with a pulse in a known slot, such that the symbols comprise pulses that are substantially equally spaced in time from adjacent symbols. The first synchronization operation includes identifying when each pulse is received for each of the symbols and using information identifying when each pulse is received for each of the symbols in the first series of symbols to identify symbol and slot boundaries for the pulse position modulation signal. The method further includes performing a second synchronization operation by receiving a second series of symbols transmitted in a known pattern, and identifying the known pattern in the received second series of symbols to identify a frame boundary.

Abstract: A laser light source includes an inner ring and an outer ring. The inner ring includes a semiconductor optical amplifier (SOA), a pair of optical circulators, a first optical filter, and a first optical waveguide connecting those in series. The outer ring includes the SOA, a pair of optical circulators, a second optical filter, an output port, and a second optical waveguide connecting those in series except for a portion shared. The inner ring operates as a gain-clamped SOA with a feedback control light defined by the first optical filter. The outer ring generates a laser output in a gain region of the clamped SOA, and with multiple peak wavelengths defined by the second optical filter, in a range from L Band to U band, applicable to WDM network systems. A WDM network system and a method of controlling the laser light source are also disclosed.

Abstract: A device transmits data to management server via the first interface. A terminal transmits management information for the device to use the first interface to the device via the second interface by visible light communication. The device transmits the data acquired by the device to the management server via the first interface based on the received management information.

Abstract: An optical transceiver is pluggable to any one of a first apparatus and a second apparatus and includes a clock recovery circuit capable of regenerating a clock signal from an electrical signal, a memory storing a first program including a first transmission rate and a second program including a second transmission rate, and a processor executing a program with a higher priority level in a boot process. The processor sets a transmission rate of a program being executed to a transmission rate set value, and operates the clock recovery circuit. In accordance with an interrupt request, the processor sets, based on regeneration or non-regeneration of the clock signal, the priority level of the first or second program that is being executed to be lower than the priority level of the first or second program that is not being executed, and boots up.

Abstract: A customer premises device including an optical modem including at least one upstream laser is power controlled to provide one or more reduced power levels of service in response to a detected AC input power failure, and/or in response to control commands, e.g., from an optical line terminal (OLT). The commands control the customer premises device to switch to a reduced power consumption mode of operation. During the reduced power mode one or a few lasers are powered, e.g., on an intermittent but predictable basis. During normal operation mode each of the upstream lasers are powered. One or more receiver circuits are also powered off during reduced power mode operation in some embodiments. A schedule is used in some embodiments to control when one or more upstream lasers and/or receivers are powered. In some embodiments the schedule is determined based on information provided by the OLT.

Abstract: Provided are a sensor unit and function activation method that make it possible to collectively activate the functions of a plurality of sensor units. A sensor unit 10, which can be connected to other sensor units 10 to form a unit series, comprises an activation unit 64 for activating a prescribed function on the basis of a signal from the outside and a signal output unit 65 for outputting a trigger signal for activating a prescribed function to the outside on the basis of a signal from the outside.

Abstract: Examples relate to a transmitter for transmitting an optical signal including multiple frequencies. The transmitter includes a waveguide to receive a multi-frequency optical signal and a plurality of resonators coupled to the waveguide. Each resonator of the plurality of resonators selectively filters an optical signal of a frequency from the multi-frequency optical signal. The transmitter includes an optical combiner coupled to the plurality of resonators to receive optical signals filtered by the plurality of resonators and generate an output optical signal including a heterodyne combination based on the optical signals received from the plurality of resonators.

Abstract: An optical wireless communication system comprises: a first device comprising a transceiver apparatus; and a plurality of further devices each comprising respective further transceiver apparatus, wherein the first device is configured to communicate via at least one optical channel with the plurality of further devices, and the transceiver apparatus of the first device comprising: a receiver for receiving light (optionally of a first wavelength or range of wavelengths) representing optical wireless communication signals transmitted by the further devices, the receiver comprising at least one photodetector; receiver-side processing circuitry for processing optical wireless communication signals received by the receiver to extract data represented by the received optical wireless communication signals; a transmitter for transmitting further light (optionally of a second wavelength or range of wavelengths)s representing optical wireless communication signals; transmitter-side processing circuitry for producing o

Abstract: A method includes detecting, by a mobile device, a light sequence emitted from a plurality of light emitting diodes on an access point and determining, by the mobile device, an identifier for the access point based on the light sequence. The method also includes reporting, by the mobile device, a geospatial location of the mobile device and the identifier for the access point to an automated frequency coordination (AFC) server to perform AFC for the access point.

Abstract: A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.

Abstract: This application provides example optical communications apparatuses. One example optical communications apparatus includes a control apparatus and an optical module matching apparatus. The control apparatus can output a first control signal to the control end. An input end of the optical module matching apparatus can connect to a first optical module and receive a first electrical signal output by the first optical module. An output end of the optical module matching apparatus can output a first serial signal. The control apparatus can output a second control signal to the control end. The input end of the optical module matching apparatus can receive a second electrical signal output by the second optical module. The output end of the optical module matching apparatus can output a second serial signal. The first electrical signal and the second electrical signal can have different level types.

Abstract: An optical module includes: a quantum photonic integrated circuit; a temperature controller; and a housing configured to house the photonic integrated circuit and the temperature controller. The photonic integrated circuit is attached to the temperature controller, such that the photonic integrated circuit is in thermal communication with the temperature controller, and the temperature controller is attached directly to the housing, such that the temperature controller is in direct thermal communication with the housing.

Abstract: An adapter includes a waterproof container, a photoelectric conversion device housed in the waterproof container and connected to an optical cable, and an attachment structure provided at the waterproof container, for use in detachably attaching the adapter to an ROV.

Abstract: Embodiments are directed to a rotor system for an aircraft comprising a gearbox configured to receive torque from a drive train, a mast having a first end and a second end, wherein the first end is attached to the gearbox and the mast configured to rotate in response to the torque from the drive train, a rotor hub attached to the second end of the mast, a first light transceiver mounted adjacent to the first end of the mast, wherein the first light transceiver is does not rotate relative to the mast, and a second light transceiver mounted adjacent to the second end of the mast, wherein the second light transceiver rotates with the mast.

Abstract: An example apparatus includes a first communications module having a first transceiver. The first communications module is operable to transmit, using the first transceiver, a plurality of first groups of optical subcarriers to a plurality of second communications modules via free-space optical communication. The first groups of optical subcarriers carry first data, and each of the first groups of optical subcarriers is associated, respectively, with a different one of the second communications modules. The first communications module is also operable to receive, using the first transceiver, plurality of second groups of optical subcarriers from the second communications modules via free-space optical communication. The second groups of optical subcarriers carry second data and each of the second groups of optical subcarriers is associated, respectively, with a different one of the second communications modules.

Abstract: Clothing equipment having a visual light communication emitter arranged to communicate a status of the clothing equipment, includes a light emitter arranged to emit flash light which is modulated at at least one target frequency in a dedicated non-visible spectrum, the light emitter including three fixed emitting portions distant from each other by predetermined distances, so as to authenticate the status of the clothing equipment.

Abstract: To provide a light wavelength separation device and a light wavelength separation method that can be flexibly adapted for various channel intervals of a wavelength-division multiplexed (WDM) signal, a light wavelength separation circuit is provided with: an optical coupler which splits a wavelength-multiplexed optical signal in which optical signals of a plurality of channels are multiplexed; a band-pass filter which is arranged for each of output ports of the optical coupler, separates optical signals included in the wavelength-multiplexed optical signal inputted from the output ports of the optical coupler into channels of which the central frequencies are not adjacent to each other, and outputs the separated optical signals from respectively different output ports; and an optical switch which selects one of paths of the optical signals inputted from the output ports of each band-pass filter.

Abstract: Various embodiments are disclosed for processing Flex Ethernet (FlexE) communications. Embodiments include a method of configuring a first FlexE node includes the first FlexE node configuring sending of second data, by the first FlexE node to a second FlexE node, using configuration specified in first data received by the first FlexE node. Other embodiments include apparatus arranged for configuring FlexE nodes, FlexE nodes comprising such apparatus, and computer-readable media.

Abstract: Systems and methods for forming a verified secure wireless connection are disclosed. One system includes a first device with a first transceiver and a second device with a second transceiver. The second device does not include a display or any other means for providing high resolution visible light information. The system also includes a visible light signal source on the second device. The first and second devices store computer-readable instructions to initialize a secure wireless connection using the first transceiver and the second transceiver. The second device also stores computer-readable instructions to generate a visible light signal using the visible light source. The first device stores computer-readable instructions to verify the secure wireless connection using the visible light signal.