Abstract: Aspects of the subject disclosure may include, for example, arranging a signal into a wavelength division multiplexing (WDM) spectral slot, wherein the signal has a first spectral width, communicating with a receiver using the signal, determining one or more network characteristics based on the communicating, adjusting a center wavelength of the signal in accordance with the one or more network characteristics, modifying the signal such that the signal has a second spectral width, resulting in a modified signal, wherein the second spectral width is larger than the first spectral width, and causing the modified signal to carry traffic to the receiver. Other embodiments are disclosed.

Abstract: A controller maps a plurality of client-side traffic ports to a plurality of line-side optical ports of a wavelength division multiplexing system, that are operatively coupled to at least one optical long haul link. The controller determines idle traffic overhead associated with at least one mapped client-side traffic port of the plurality of client-side traffic ports. The controller determines that there is underutilized bandwidth capacity in at least a first line-side optical port in the plurality of mapped line-side ports that would reduce a need for use of at least a second line-side optical port. The controller logically remaps at least one client-side traffic port from the second line-side port to the underutilized first line-side optical port in response to determining that there is underutilized bandwidth capacity of the first line-side optical port.

Abstract: An RF signal transmission system which ensures the transmission of very wide bandwidth RF (radio frequency) signals to long distances with low noise factor in the defense industry, RADAR systems, electronic warfare systems, and including a fiber optic transmitter, a fiber optic cable and a fiber optic receiver.

Abstract: An optical wireless communication device (100) comprising: a two-dimensional array of emitters (110) each emitter arranged to emit an optical signal and having an individual coverage area; wherein the two-dimensional array of emitters (110) is arranged to create a combined coverage area larger than the individual coverage area, with each individual coverage area evenly distributed within the combined coverage area; a receiver (120) configured to receive a feedback from a remote device in the combined coverage area; and a controller (101) configured to assign an address to each emitter out of the two-dimensional array of emitters, each address comprising a pair of codes representing coordinates on an X-axis and a Y-axis, respectively, according to a Cartesian coordinate system, to uniquely identify each emitter in the Cartesian coordinate system; wherein each emitter out of the two-dimensional array of emitters (110) is configured to send a beacon signal comprising its address for assisting the remote device t

Abstract: Light-emitting diode (LED) packages and, more particularly, real-time digital communication for LED packages and related methods are disclosed. Discrete LED packages are arranged for cascade communication. Each LED package is separately capable of receiving communication from a data stream, controlling operation of one or more LED chips, and performing real-time processing on at least one alterable data value of the data stream. LED packages may include real-time processors capable of processing data from a data value of the data stream and introducing the processed or altered data back into the data stream in the same data value. LED packages are disclosed that may be assembled together in arrays where each LED package may separately process data and send the processed data to the next downstream LED package. Such real-time processing may be performed while also providing various bit delays within each LED package.

Abstract: Methods and systems for down-conversion of high frequency signals in millimeter-wave (mm-wave) communications and for up-conversion of high frequency signals in millimeter-wave (mm-wave) communications. A quantum dot multi-wavelength laser (QD MWL) source generates an optical signal comprising of a plurality of optical channels and allows flexible selection of the optical channels which can be used to generate and process RF signals in higher frequency bands of mm-wave spectrum including K-band, Ka-band V-band, W-band encompassing all 3GPP NR FR2 bands and even THz range depending on the channel spacing.

Abstract: A system includes one or more memories, and model generation circuitry coupled to the one or more memories, wherein the model generation circuitry is configured to: determine a plurality of decision trees, wherein each decision tree is associated with a corresponding network whose attribute data, including interface statistics, is used for training a trained model and includes one or more decision nodes for indicating whether the corresponding network includes a rogue network device; aggregate the plurality of decision trees to generate the trained model; and output the trained model for rogue network device detection.

Abstract: Provided is a detachable light source supply apparatus in which a light source element, which has a high probability of failure among components of an optical transceiver, is separately disposed on the outside, to supply a light source to the optical transceiver. This detachable light source supply apparatus includes a detachable coupling part to the optical transceiver, and an optical input/output unit. The detachable coupling part and the optical input/output unit may be implemented with MPO type connectors. Depending on various wavelength standards, an external light source element may be a multi-channel light source element that emits light sources having different wavelengths. For the multi-channel light source element, a plurality of light emitter of a single wavelength may be used, and in other embodiments, a multi-channel light emitter that emits light sources having a plurality of different wavelengths may be used.

Abstract: A data communication cable assembly, comprising: a first connector configured to connect to a first device, including a first coherent optical transmitter configured to: receive a first electrical data signal from the first device; and coherently modulate a first optical carrier with the first electrical data signal to generate a first optical data signal; a cable including a first end mechanically coupled to the first connector, wherein the cable comprises at least one optical fiber; and a second connector mechanically coupled to a second end of the cable, and configured to connect to a second device, including a first coherent optical receiver configured to: receive the first optical data signal from the first coherent optical transmitter via the at least one optical fiber; and coherently demodulate the first optical data signal using the first or a second optical carrier to regenerate the first electrical data signal for the second device.

Abstract: The disclosure relates to the technical field of optical fibers, and particularly relates to an optical fiber detection method, a reconfigurable optical add-drop multiplexer (ROADM) system, a server, and a storage medium. The optical fiber detection method is applied to a network management server of the ROADM system.

Abstract: When a frequency deviation compensation amount is compensated for by use of frequency shift, a phase offset occurs between adjacent input blocks included in a plurality of input blocks as divided, with the result that an error occurs in a reconstructed bit sequence. A frequency deviation compensation system of the invention is characterized by comprising: a frequency deviation compensation means for compensating for a frequency deviation occurring in a signal by use of frequency shift; and a phase offset compensation means for compensating for a phase offset occurring, in the signal, due to the frequency shift.

Abstract: A quantum optical memristor for manipulating photon quantum states includes a Mach-Zehnder interferometer having a first optical input and a first optical output and a second optical output. The first optical input and the first optical output of the Mach-Zehnder interferometer are a first optical input and a first optical output of the quantum optical memristor respectively. A detector is configured to detect a time-dependent optical signal at the second optical output of the Mach-Zehnder interferometer. A controller is configured to compute a target reflectivity of the Mach-Zehnder interferometer, wherein the controller is configured to update the reflectivity of the Mach-Zehnder interferometer to match the computed target reflectivity. The controller is configured to compute the target reflectivity based on the derivative of the reflectivity with respect to time. The derivative of the reflectivity with respect to time is a linear function of the detected signal.

Abstract: Apparatuses, methods, and systems for a modulated laser are disclosed. The modulated laser includes a substrate including a plurality of laser segments, a first laser segment comprising a DC electrode, a second laser segment comprising an AC electrode, an isolation barrier formed between the first laser segment and the second laser segment, and a modulated laser cavity spanning from a rear face to a front face of the modulated laser inclusive of the plurality of laser segments, wherein a primary injection current supporting stimulated emission at a desired optical output power out of the front face of the modulated laser is generated when a DC bias is applied to the DC electrode, and wherein a carrier signal of the modulated laser is modulated when an AC signal is applied to the AC electrode, wherein the AC bias is independent of the DC bias.

Abstract: The present invention relates to a method and a device for feed-forward carrier recovery in coherent optical communication. The present invention discloses the method and the device to receive an optical signal from a light source, wherein the optical signal comprises at least one pilot pulse and at least one signal pulse including information. Quadrature values of a plurality of samples of the at least one pilot pulse are determined using a local oscillator signal of a local oscillator source. A phase difference between the received optical signal of the light source and the local oscillator signal of the local oscillator source is determined using the quadrature values of the plurality of samples and the carrier information of the at least one signal pulse is recovered based on the determined phase difference.

Abstract: At a first node in a network, a first (second) message is received indicating that a first (second) quantum element at the first node is entangled with a quantum element at a second (third) node in the network. The first (second) message comprises a first (second) identifier that uniquely identifies one of a plurality of entanglement generation operations between the first and second (third) nodes over a first time period. At the first node, a third identifier is generated that identifies an entanglement resulting from an entanglement swap operation based on the entangled quantum elements at the first and second nodes and the entangled quantum elements at the first and third nodes. At least a portion of the first identifier is included in the third identifier, and at least a portion of the second identifier is included in the third identifier.

Abstract: This disclosure provides a service data processing method. The method includes: receiving service data; obtaining a processing manner for processing the service data; performing first timeslot-based multiplexing, bit width conversion, and second timeslot-based multiplexing on the service data when a bandwidth of the service data is less than a first threshold, to obtain an intermediate frame; performing single-level timeslot-based multiplexing on the service data when the bandwidth of the service data is not less than the first threshold, to obtain the intermediate frame; mapping the intermediate frame to an optical transport network (OTN) frame; and sending the OTN frame. A first bit width and a first bandwidth based on which the first timeslot-based multiplexing is performed are different from a second bit width and a second bandwidth based on which the second timeslot-based multiplexing and the single-level timeslot-based multiplexing are performed.

Abstract: A method for determining a round-trip latency of a communication channel in a system between a first device and a second device, comprising: setting an estimated round-trip latency binary value by the first device that represents a latency measured in clock cycles; generating and sending a first test signal by the first device comprising alternating first and second values, being sent at each clock cycle; saving each first and second value of the first test signal for a duration that corresponds to the estimated latency value; receiving the first test signal at the second device; sending, by the second device, a validating signal that is based on the first test signal; receiving the validating signal at the first device; and determining if the latency value is correct based on the comparing of the validating signal and the first test signal.

Abstract: Provided an optical transmission characteristic estimation device that models an optical effect of an optical transmission line by a nonlinear Schrodinger equation, divides the optical transmission line into N (N is an integer of two or more) sections, obtains a solution of the nonlinear Schrodinger equation by an operation of N steps in which a section length of each of the divided N sections is a step size, and estimates transmission characteristics of the optical transmission line, the optical transmission characteristic estimation device including a step size update unit configured to update each of the N step sizes on the basis of an estimated optical power distribution and an estimated dispersion distribution, which are indicated by the transmission characteristics.

Abstract: The present disclosure provides an optical access network and a method for designing the same, in which a plurality of optical cable loops, in which optical cables are connected in a loop shape, are disposed between a communication station building and an optical termination position, and the optical cable loops are connected to each other.

Abstract: A communication method in a communication system including an optical transmission device and an optical reception device includes: detecting wave-front distortions of a reference optical signal used for wave-front observation which arrives at a first time point and a second time point before a compensation start time point at which compensation for wave-front distortion is performed, by a plurality of sensors; estimating spatial phase distributions of a plurality of atmospheric layers between the optical transmission device and the optical reception device, respectively, at the first time point and the second time point, based on the wave-front distortions detected by the plurality of sensors, respectively; predicting the respective spatial phase distributions of the plurality of atmospheric layers at the compensation start time point by using estimation results of the respective spatial phase distributions of the plurality of atmospheric layers estimated at the first time point and the second time point; co