Abstract: In one embodiment, a method includes receiving power delivered over a data fiber cable at an optical transceiver installed at a network communications device and transmitting data and the power from the optical transceiver to the network communications device. The network communications device is powered by the power received from the optical transceiver. An apparatus is also disclosed herein.

Abstract: An optical wireless transmission system includes a transmission device including a digital baseband processor configured to generate a plurality of orthogonal signals, a pulse modulator configured to pulse-modulate an orthogonal signal, and a dither modulator configured to add a dither signal to a pulse-modulated signal, an optical fiber module configured to convert a signal to which a dither signal is added into an optical signal, transmit the optical signal through an optical fiber, and convert the optical signal into a digital electric signal, and a remote unit configured to transmit a digital electric signal transmitted by the optical fiber module as a radio signal.

Abstract: A monitoring control device and an optical transmission path monitoring device include a path information reception circuit for receiving optical path information indicating an optical path state when a path of signal light propagating through an optical transmission path is switched; and a transmission coefficient determination circuit for determining a transmission coefficient for use in monitoring a state of the optical transmission path by monitoring light depending on the optical path state.

Abstract: Optical beam-steering apparatus whereby an actuator effects relative movement, in a first direction, between an optical component comprising one or more lenses and a series of active transmitting or receiving elements, each active element disposed behind a respective one of the lenses. Different active elements are arranged at different positions relative to their respective lens in a second direction non-parallel to the first direction. Thus by selecting which of the first active elements to activate using the addressing circuitry, a first transmitting or receiving beam can be controlled to be formed at a selected angle in one dimension. Whereas by operating the actuator to effect a relative motion between the optical component and the series of active elements in the first direction, the first transmitting or receiving beam can be controlled to be formed at a selected angle in another, non-parallel dimension.

Abstract: The present disclosure provides an optical module, including a housing, an optical transmitter assembly, an optical receiver assembly, and an EMI shielding. The optical transmitter assembly is accommodated in the housing. The optical transmitter assembly includes an optical transmitting unit and an optical modulator, and the optical modulator is optically coupled to the optical transmitting unit. The optical receiver assembly is accommodated in the housing. The EMI shielding is accommodated in the housing, and the optical transmitter assembly and the optical receiver assembly are located on opposite sides of the EMI shielding, respectively.

Abstract: A method for initiating, via a telecommunications network, a communication or connectivity service between a first location and a second location based on optical data transmission of a user-defined optical signal includes: in a first step, an optical initialization signal is fed or input to an optical data transmission fiber; in a second step, the optical initialization signal is received by an optical safety and policy entity or functionality of the telecommunications network, and an identity of the optical initialization signal is determined by the optical safety and policy entity or functionality; and in a third step, dependent on the determined identity of the optical initialization signal, the communication or connectivity service between the first location and the second location is activated.

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: Some wireless communications systems may utilize optical wireless communication (OWC) to transmit or receive information. For instance, a first device may communicate with a second device via an OWC link. Some OWC systems may operate in an optical spectrum between approximately 1011 and 1016 hertz. Some examples of the techniques described herein may provide communication performance improvements by utilizing frequency-dependent communication structures for OWC. For example, frequency-dependent constellation patterns may be utilized for a codeword. Utilizing frequency-dependent constellation patterns may contrast with some approaches that utilize one modulation and coding scheme (MCS) per codeword. In some aspects, allocated frequency domain resources may be arranged into subbands with different MCSs. In some examples, an optical channel with relatively little or no fading may allow streamlining of channel state or control signaling. For example, MCS patterns may be updated relatively less frequently.

Abstract: A signal processing apparatus (10) according to the present disclosure includes: an overlap-type FFT processing unit (11) that performs FFT processing overlapping input subcarrier signals each other for each of FFT blocks, and a generation unit (12) that generates a signal which is obtained by frequency shifting the subcarrier signals that have been subjected to the FFT processing by the overlap-type FFT processing unit (11) by a frequency shift amount of a subcarrier, a phase offset that occurs between the FFT blocks overlapping each other being compensated in the signal.

Abstract: This application provides a data transmission method, a radio frequency unit, a baseband unit, and a communication system. The baseband unit includes: a multi-wavelength integrated light source, configured to generate a first optical carrier and a second optical carrier that have different wavelengths; a first modulator, configured to modulate downlink data sent to the first radio frequency unit to the first optical carrier, to obtain a first downlink optical signal; a second modulator, configured to modulate downlink data sent to the second radio frequency unit to the second optical carrier, to obtain a second downlink optical signal; and a multiplexer/demultiplexer, configured to multiplex the first downlink optical signal and the second downlink optical signal into a downlink combined optical signal and send the downlink combined optical signal.

Abstract: An optical communication system and a method. The system includes a distributed acoustic sensing (DAS) interrogation unit. The DAS interrogation unit is configured to generate one or more optical signals for determining a status of one or more portions of an optical communication path, modulate one or more optical signals using one or more measurement pulses and generate one or more modulated optical signals, and transmit one or more modulated optical signals to the one or more portions of the optical communication path. The status of one or more portions of the optical communication path is determined based on one or more reflected signals reflected by one or more portions of the optical communication path in response to one or more modulated optical signals.

Abstract: A communication system that includes a master communication device, a service communication device, and passive optical routing devices is provided. The master communication device obtains first signal from data source or modem and directs first laser beam carrying the first signal in a downstream path to the service communication device directly or via the plurality of passive optical routing devices. The service communication device demodulates the first signal from the first laser beam, re-modulates the demodulated first signal into a plurality of different radio frequency (RF) signals associated with different communication protocols having different communication ranges, and serves a plurality of end-user devices based on wireless communication capabilities of the plurality of end-user devices and the re-modulation of the demodulated first signal into the plurality of different RF signals.

Abstract: An optical communication fiber link including a monitoring system connected to an optical fiber transmitting electromagnetic radiation including a communication. The monitoring system includes a detection system detecting a scattering of the electromagnetic radiation from the optical fiber. The monitoring system monitors the scattering for an abnormal change and determines, from the abnormal change, an absence or a presence of a fault in the optical fiber.

Abstract: Embodiments of the present disclosure relate to devices, methods, apparatuses and media for communication. A device for communication is configured to generate target data for the optical network unit based on template data for an optical network unit set and instance data for an optical network unit in the optical network unit set. The device is further configured to perform validation on the target data of the optical network unit. In this way, an optical network unit data validation solution that supports an optical network unit to use template data is provided, which can significantly improve the validation speed of optical network unit data.

Abstract: A method includes generating first and second optical carrier signals having a specified frequency offset. The method also includes modulating an RF input signal onto a portion of the first optical carrier signal to generate modulated optical signals, where the modulated optical signals include the portion of the first optical carrier signal and sideband signals. The method further includes suppressing the portion of the first optical carrier signal in the modulated optical signals to generate carrier-suppressed single sideband signals. The method also includes optically filtering the carrier-suppressed single sideband signals to generate filtered carrier-suppressed single sideband signals. The method further includes combining the filtered carrier-suppressed single sideband signals with portions of the second optical carrier signal to generate frequency-converted optical signals. In addition, the method includes generating an output RF signal based on the frequency-converted optical signals.

Abstract: An aspect of the present invention is an optical transmitter including: a first modulation unit configured to generate an optical modulated signal through intensity modulation of an optical signal; a second modulation unit configured to generate an optical modulated signal through phase/frequency modulation of the optical signal; and a modulation scheme switching unit configured to switch a modulator of the optical signal to one of the first and second modulation units. The modulation scheme switching unit switches the modulator to a modulation unit corresponding to a device of a connection destination between the first and second modulation units.

Abstract: A data center interconnect (DCI) includes a downstream (DS) transceiver array including one or more DS transceivers. The DCI further includes a first comb source in operable communication with the US transceiver array. The first comb source is configured to generate one or more first spaced optical signals. The DCI further includes an upstream (US) transceiver array including one or more US transceivers in operable communication, over an optical communication medium, with the one or more DS transceivers, respectively, of the DS transceiver array. The DCI further includes a second comb source in operable communication with the US transceiver array. The second comb source is configured to generate one or more second spaced optical signals.

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.