Abstract: An optical transmitter capable of colorless WDM includes a source of optical frequency comb (OFC) light having a plurality of separate optical frequency tones, and a plurality of optical modulators connected in parallel to modulate different parts of the OFC light with corresponding modulating signals, each of the parts including the plurality of separate optical frequency tones. An optical combiner combines the different parts of the OFC light to obtain an output optical signal of the optical transmitter. MIMO processing may be used to recover the modulating signals at an optical receiver using, or to configure the modulating signals at the transmitter so that each of the frequency tones is modulated with a corresponding target data signal.

Abstract: According to an aspect, a flexible node design for a high-degree ROADM is provided. In an embodiment, this design is implemented as a network node. The network node includes a plurality of optical input and a plurality of optical outputs. The network node further includes a MEMS (or other Optical Cross Connect, OXC) component and a WSS component, where each of the OXC and the WSS component has a set of inputs of the plurality of optical inputs and a set of outputs of the plurality of optical outputs. In some embodiments, the network node has a set of add inputs supported by one or both of the OXC and WSS components. In some embodiments, the network node has a set of drop outputs supported by one or both of the OXC and WSS components.

Abstract: In order to perform data transfer efficiently in an electro-optical hybrid switch network, monitor data that is a blocking rate in an optical line switching network, an amount concerning flows transferred by a connection apparatus to an electric packet network, a buffer utilization state in telecommunication devices within the electric packet network, or packet transfer latency or the like in telecommunication devices is obtained, and based on the monitor data, a threshold for distinguishing a first flow to be transferred by the connection apparatus through the optical line switching network from a second flow to be transferred by the connection apparatus through the electric packet network is changed, wherein the threshold is to identify, as the first flow, a flow that has a size exceeding the threshold and identify, as the second flow, a flow that has a size that is equal to or less than the threshold.

Abstract: A sub-carrier multiplexing (SCM) system include a digital layer including circuitry configured to interface with a client via a client signal and to interface with a media layer via a plurality of constituent signals, that together comprise the client signal; and the media layer including sub-carrier multiplexing (SCM) with each sub-carrier configured to carry one of the plurality of constituent signals. The client signal can be an Ethernet signal, Optical Transport Network (OTN) signal, etc., and the plurality of constituent signals can be Flexible Ethernet (FlexE) layer signals, Flexible OTN (FlexO) layer signals, Metro Transport Network (MTN) layer signals, ZR layer signals, etc.

Abstract: A transmitting device for transmitting a broadband optical transmission signal via an optical waveguide, having an electronic subsystem and an optical subsystem, the optical subsystem has N electro-optic modulators for providing N optical signal components, where N is a number greater than 1, the electronic subsystem is configured to transform a baseband signal by a Fourier transform, or a discrete Fourier transform, into a frequency spectrum containing N digital coefficient signals, and to provide, on a basis of the N digital coefficient signals, N analog coefficient signals, and the electro-optic modulators of the optical subsystem are configured to be driven each by one of the N analog coefficient signals.

Abstract: A cloud-based infrared signal protocol detector that is able to detect signal protocols for infrared-controlled devices and appliances and is able to generate new signal models for infrared signal protocols that cannot be detected. In an embodiment, the cloud-based infrared signal protocol detector comprises a signal capture and processing circuit, a cloud-based service comprising a signal protocol detector, an IR signal database comprising one or more signal models, and a new signal model manager.

Abstract: A wireless communication method in a wireless communication system including an exchange device and a base station device that performs beamforming according to the control of the exchange device, in which: the exchange device performs beamforming control of the base station device by transmitting an optically modulated signal to the base station device via an optical transmission line, the optically modulated signal being generated by modulating an intensity of an optical signal on a basis of a transmission signal to be transmitted by controlling any combination of an optical wavelength, a frequency, and an optical polarization or controlling the frequency; and the base station device performs beamforming in a direction in which a wireless signal radiated from an antenna to which an electrical signal based on the optically modulated signal has been input is reflected by a reflector or is transmitted through a lens among antennas corresponding to the number of combinations of the optical wavelength, the frequ

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.