Abstract: The present disclosure is a base station system S that connects each of base station functional units that provides each of radio schemes and each of antenna units in each of provision areas via an optical fiber section, the base station system including passive light functional units disposed between each of base station functional units and each of antenna unit and including each downlink signal output port to which each downlink signal wavelength is allocated and each uplink signal output port to which each uplink signal wavelength is allocated and an optical switch disposed between each of the antenna units and the passive light functional units, accommodates some of each of the radio schemes, and switches to which one of the provision areas the some of the radio schemes are provided.

Abstract: The present invention relates to a method for dual-polarisation SDM transmission over optical fibre. The transmission method uses specific I/Q coding for combating the effects of PDL. The modulation symbols to be transmitted on the 2N polarisation states of the N wavelengths are broken down into real values and imaginary values (220). A first orthogonal linear transformation (230-1) is applied to the vector of the real values thus obtained and a second orthogonal linear transformation (230-2), separate from the first, is applied to the vector of the imaginary values thus obtained. A complex scalar solving an irreducible polynome of [X] in is multiplied with the first or second transformed vector before the two transformed vectors are summed (240) in order to provide a vector of transmission symbols for modulating the different states of polarisation of the spatial elementary channels.

Abstract: Provided are a method and apparatus for controlling power consumption of an ONU, an electronic device, and a storage medium. The method includes: monitoring a current state of the ONU in real time, wherein the state at least includes a deep energy saving state, and data flow of the ONU in the deep energy saving state is lower than a preset threshold; and performing message processing on received data through a CPU channel and performing a power-off operation on a hardware module in an acceleration channel of the ONU when the ONU is currently in the deep energy saving state; wherein the acceleration channel is connected to a data ingress of the ONU, and the hardware module in the acceleration channel is configured to perform message processing on the received data of the ONU.

Abstract: Channel monitoring means monitors channel quality information of a plurality of optical signals of a plurality of channels transmitted from a transmitting apparatus and received by a receiving apparatus, and outputting first information including the monitored channel quality information, the transmitting apparatus processing a plurality of data signals to transform them into a plurality of mixed data signals using a transfer matrix and converting the plurality of mixed signals into the plurality of optical signals. Estimation means estimates transmission a first objective between the transmitting apparatus and the receiving apparatus based on the first information and second information received from the transmitting apparatus, and outputting an estimation result.

Abstract: An optical virtual-circuit-switching network system and optical switches thereof are provided. The optical virtual-circuit-switching network system includes multiple optical switches. Each optical switch includes an optical outbound handling module, an optical pass around module, and an optical inbound handling module. The optical outbound handling module transmits optical signals to both the horizontal optical network subsystem and the vertical optical network subsystem. The optical pass around module transmits optical signals from the horizontal optical network subsystem to the vertical optical network subsystem, or transmits optical signals from the vertical optical network subsystem to the horizontal optical network subsystem. The optical inbound handling module outputs the selected optical signals to dense wavelength-division multiplexing transceivers and, through these transceivers, converts the optical signals into electrical signals before forwarding the data to the top-of-rack switches.

Abstract: Aspects of the disclosure provide a method of adjusting a plurality of phase shifters of an OPA. The method may include identifying a plurality of subsets of phase shifters of the plurality of phase shifters based on an orthogonal set of functions; performing a plurality of dithers iteratively on the plurality of subsets of phase shifters of the plurality of phase shifters using the same frequency; determining a plurality of corrections based on a plurality of outputs of the OPA, each output resulting from each of the plurality of dithers; and adjusting the plurality of subsets of phase shifters of the plurality of phase shifters using the plurality of corrections, the adjustment resulting in at least one set of corrected phase shifter values.

Abstract: An optical power and data delivery system includes an optical base station and an autonomous wireless hotspot device. The optical base station includes routers, a media converter device, a optical data transceiver configured to transmit the received data laser light beam; one or more power laser devices configured to transmit a power laser light beam, a beam combining device to generate and transmit a combined power and data laser light beam through a first optical antenna. The autonomous wireless hotspot device includes a second optical antenna configured to receive the combined data and power laser light beam, an optical dividing device, an optical data transceiver, a media converter device and wireless communication transceivers to transmit wireless data signals and one or more laser power converters to receive the power laser light beam and to convert the power laser light beam into electrical energy.

Abstract: A coexistence element within a passive optical network (PON) includes a housing having a plurality of input communication ports. Each input communication port is configured to receive, via a separate optical fiber, optical communications each having a wavelength within a particular wavelength band corresponding to a particular optical service. At least one of the input communication ports is configured to receive optical communications having wavelengths within two or more different wavelength bands. The housing also includes an output communication port configured to transmit, via a single optical fiber, the optical communications from each of the plurality of input communication ports.

Abstract: The present invention relates to a method for dual-polarisation WDM transmission over optical fibre. The transmission method uses specific I/Q coding for combating the effects of PDL. The modulation symbols to be transmitted on the 2N polarisation states of the N wavelengths are broken down into real values and imaginary values (220). A first orthogonal linear transformation (230-1) is applied to the vector of the real values thus obtained and a second orthogonal linear transformation (230-2), separate from the first, is applied to the vector of the imaginary values thus obtained. A complex scalar solving an irreducible polynome of [X] in is multiplied with the first or second transformed vector before the two transformed vectors are summed (240) in order to provide a vector of transmission symbols for modulating the different states of polarisation of the WDM channels.

Abstract: A communication module of the present invention is a communication module including a transmission/reception part and an electromagnetic flux controlling member. The electromagnetic flux controlling member includes a first surface and a second surface. The first surface of the electromagnetic flux controlling member includes a first region including an incidence portion of near-axis light to be converged at a first focal position, the near-axis light being located closest to a central axis of the electromagnetic flux controlling member, and a second region disposed in a region surrounding the first region and including an incidence portion of light to be converged at a second focal position when parallel light is entered from the first surface and emitted from the second surface. The second focal position is located at a position farther from the electromagnetic flux controlling member than the first focal position.

Abstract: A free-space optical communication apparatus control apparatus includes: a detecting section for detecting an impediment to laser communication of a free-space optical communication apparatus; and a judging section for judging, in accordance with the state of the impediment to the laser communication, whether pruning of a tree is necessary.

Abstract: A communication apparatus including a transmitter that transmits modulated light modulated by a modulation part of a spatial light modulator as a first spatial light signal, a receiver that receives a second spatial light signal transmitted from a communication target, a detector that detects a physical quantity related to oscillation of the own apparatus, and a communication control unit that acquires the physical quantity detected by the detector and information on oscillation of the communication target included in the second spatial light signal, analyzes a state of the oscillation of the communication target using the information on the oscillation of the communication target and the physical quantity, and sets a transmission condition of the first spatial light signal in the transmitter according to the analyzed state of the oscillation of the communication target.

Abstract: Disclosed herein are devices, methods, and systems for selectively amplifying optical signals using an optical circuit. The optical circuit includes an input port to receive a plurality of input laser signals and a switching array connected to the input port. The switching array includes a plurality of switching optical amplifiers configured to amplify a laser signal of the plurality of input laser signals as an amplified laser signal and absorb the remaining of the plurality of input laser signals. The optical circuit also includes a splitting circuit connected to the switching array. The splitting circuit is configured to split the amplified laser signal into a plurality of output laser signals.

Abstract: A regenerative relay transponder includes: an optical receiving unit that receives an optical signal from a transmitting device as a reception optical signal and converts the reception optical signal into an electrical signal; an electrical-signal processing unit that executes predetermined processing on the electrical signal; an optical transmitting unit that generates a transmission optical signal by converting the electrical signal subjected to the predetermined processing into an optical signal and transmits the transmission optical signal; and a monitoring unit that monitors the predetermined processing by the electrical-signal processing unit, wherein the monitoring unit accumulates in a storage unit monitoring data, which indicates the result of the monitoring, over a predetermined period and causes a communication unit to transmit the monitoring data accumulated over the predetermined period as transmission data to the transmitting device.

Abstract: An optical communication system is provided with a sequence of diffraction gratings interposed between an external signal pathway and both an internal transmitting unit and an internal receiving unit. A plurality of diffraction gratings arranged into the sequence define a reciprocal optical directional filter. The diffraction gratings, transmitting unit, receiving unit and external signal pathway are arranged such that the transmitted signals from the transmitting unit are transmitted through the sequence of gratings to the external signal pathway based on the wavelength and angle of incidence of the transmitted signals and the received signals from the external signal pathway are transmitted through the sequence of gratings to the receiving unit based on the wavelength and angle of incidence of the received signals. The gratings can be volume Bragg gratings formed within a solid transparent volume interposed between the external signal pathway, the internal transmitting unit and the internal receiving unit.

Abstract: Aspects of the disclosure provide a method of adjusting a plurality of phase shifters of an OPA. The method may include identifying, by one or more processors, one or more first subsets of phase shifters of the plurality of phase shifters based on an orthogonal set of functions; performing, by the one or more processors, one or more first dithers on the one or more first subsets of phase shifters of the plurality of phase shifters using one or more first frequencies of a predetermined set of frequencies; determining, by the one or more processors, one or more first corrections based on a first power output of the OPA resulting from the one or more first dithers; and adjusting, by the one or more processors, the one or more first subsets using the one or more first corrections, the adjustment resulting in a first set of corrected phase shifter values.

Abstract: The present disclosure relates to methods, apparatuses, and computer readable medium for communication in a passive optical network. According to an embodiment, a method for communication implemented at an optical network unit may includes receiving an optical network unit management and control interface (OMCI) message from an optical line terminal, the OMCI message including configuration information on a synchronization status message incoming (SSM-IN) managed entity; receiving synchronization status information from the optical line terminal; and processing the received synchronization status information according to the configuration of the SSM-IN managed entity.

Abstract: A downlink data transmission method and apparatus, a storage medium, and an electronic device are disclosed. The method may include: determining a transmission delay, where the transmission delay includes a sum of an optical fiber transmission delay and a downlink processing delay from a Media Access Control (MAC) exit to an air interface (S102); determining a frame starting time of the MAC exit according to the transmission delay (S104); and transmitting downlink data according to the frame starting time (S106).

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: A transmission method for optical communication and a related device and system are provided, which may be applied to various scenarios such as a metropolitan area network, a backbone network, and data center interconnect of over 400 Gbps (including 600 Gbps, 800 Gbps, and the like). The method includes: generating a super-frame including a plurality of sub-frames; and transmitting the super-frame, wherein each sub-frame includes training symbols and pilot symbols, and each of the training symbols and the pilot symbols is one of ?A?Aj, ?A+Aj, A?Aj, and A+Aj, A being a real number. In addition, in the training symbols and the pilot symbols included in each sub-frame, quantities of ?A?Aj, ?A+Aj, A?Aj, and A+Aj in two mutually perpendicular polarization directions meet specific requirements, so that direct current balance can be achieved, which helps a receiver end restore a signal.