Abstract: Methods, systems, and devices for a decision directed multi-modulus searching algorithm are described. A receiver may receive a signal including a set of data symbols. The receiver may iteratively determine a set of centroids for demodulating the set of data symbols (e.g., as part of a training procedure). The centroids may be used to demodulate the set of data symbols according to a modulation constellation associated with the set of data symbols. The training procedure may include, for each data symbol of a subset of data symbols, assigning a centroid of the set of centroids to each data symbol and updating the set of centroids based on assigning the centroid to each data symbol. The receiver may demodulate the set of data symbols based on the updated set of centroids.

Abstract: An optical transceiver may include an optical transmitter and an optical receiver. The optical transmitter and receiver may each include a grid including one or more lanes spaced apart. Each lane may correspond to a predetermined optical signal, or wavelength. The optical transmitter may include one or more sets of lasers to output one or more optical signals corresponding to the grid. Each set of laser may output a set of optical signals. Each set of lasers and, therefore, each set of optical signals may have a different passband. For example, the multiplexing and/or demultiplexing architecture may have a wide passband for the first set of optical signals and a narrow passband for the second set of optical signals. The narrow passband may be determined based on the space between two wider passbands.

Abstract: A method includes: determining, by the control device, that a site receives a first service; determining that a mapping wavelength of a first service is blocked on an original routing path, where the original routing path includes a first line board connected to a first local dimension, and a wavelength occupied by the first local dimension includes the mapping wavelength of the first service; and routing, by the control device, the first service to a second line board connected to a second local dimension, where the mapping wavelength of the first service is available in the second local dimension.

Abstract: Disclosed are an apparatus and testing methods for performing testing operations over multiple types of links and through multiple potential points of failure to segment sources of problems, which may relate to reported or actual instances of service disruption in a network communication environment. The apparatus may perform service layer testing directly via an optical link, in addition to via Ethernet service layer testing. The apparatus may further conduct tests on other layers as well, including the physical layer, the network layer, and the link layer. To facilitate efficient testing, the apparatus may integrate programmable workflow profiles that specify tests to be conducted, and may interface with a cloud platform for sharing results of the tests, providing end-to-end testing of various components and types of links (whether optical or electrical, including wired and wireless links). Results of the tests may provide guidance to resolve detected problems.

Abstract: A device includes a photonic integrated circuit having an optical phased array. The optical phased array includes multiple array elements, where each array element includes (i) an antenna element configured to transmit or receive optical signals and (ii) a phase modulator configured to phase-shift the optical signals transmitted or received by the antenna element. The device also includes multiple digital register in integrated circuit (DRIIC) cells, where each DRIIC cell is associated with one of the array elements. The DRIIC cells are configured to receive digital inputs and to provide outputs to the phase modulators of the associated array elements in order to control the phase-shifts of the optical signals transmitted or received by the antenna elements based on the digital inputs.

Abstract: A decoder for determining an estimate of a vector of information symbols carried by optical signals propagating along a multi-core fiber in an optical fiber transmission channel according to two or more cores is provided. The decoder is implemented in an optical receiver. The optical signals are encoded using a space-time coding scheme and/or scrambled by at least one scrambling device arranged in the optical fiber transmission channel according to a predefined scrambling function. The decoder comprises a processing unit configured to adaptively: determine, in response to a temporal condition, one or more channel quality indicators from the optical signals; determine a decoding algorithm according to a target quality of service metric and on the one or more channel quality indicators; update the predefined scrambling function and/or the space-time coding scheme depending on the target quality of service metric and on the one or more channel quality indicators.

Abstract: Provided are a laser emission system and a method for compensating for wavelength drift. The laser emission system includes a burst signal controller, a laser emitting chip, a TEC controller, and a TEC, the TEC is attached to the laser emitting chip, the burst signal controller is connected with the laser emitting chip and the TEC controller, respectively, the TEC controller is connected with the TEC, and the burst signal controller simultaneously sends a burst control signal to the laser emitting chip and the TEC controller; the laser emitting chip activates or deactivates a laser based on the received burst control signal; the TEC controller correspondingly controls a target temperature of the TEC based on the received burst control signal, so that the target temperature of the TEC is low when the laser is activated, and the target temperature of the TEC is high when the laser is deactivated.

Abstract: The various embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel made of a multi-core fiber, optical signals carrying the data propagate along the multi-core fiber according to two or more cores, each core being associated with one or more core parameters, wherein the optical transmission system comprises: a scrambling configuration device configured to determine a scrambling function depending on one or more of the core parameters associated with the two or more cores, and at least one scrambling device arranged in the optical fiber transmission channel for scrambling the two or more cores, each of the at least one scrambling device being configured to determine permuted cores by applying the scrambling function to the two or more cores and to redistribute the optical signals according to the permuted cores.

Abstract: An operating system includes an air conditioner and an infrared output device. The air conditioner includes an indoor unit. The infrared output device is configured to receive first information on an instruction to a first-type apparatus other than the air conditioner and operable by an infrared signal and transmit an infrared signal corresponding to the first information to the first-type apparatus. The air conditioner further includes a management device configured to manage the first-type apparatus. The management device includes a command information receiving unit configured to receive second information on a command content, and a determination unit configured to determine whether there is a deviation between a behavior of the first-type apparatus and the command content, based on the behavior of the first-type apparatus and the second information.

Abstract: An infrared output device is installed in a fixed apparatus whose position is fixed in a predetermined space. An input receiving device is configured to receive, through voice input, a control command to a first-type apparatus controllable by infrared ray. Upon the input receiving device receiving the control command, the infrared output device is configured to output infrared ray to the first-type apparatus.

Abstract: There is described herein a quantum computing system, quantum processor, and method of operating a quantum computing system. The quantum computing system comprises a quantum control system configured for at least one of delivery and receipt of multiplexed optical signals. At least one optical fiber is coupled to the quantum control system for carrying the multiplexed optical signals, and a quantum processor is disposed inside a cryogenics apparatus and coupled to the at least one optical fiber. The quantum processor comprises: at least one converter configured for converting between the multiplexed optical signals and microwave signals at different frequencies; and a plurality of solid-state quantum circuit elements coupled to the at least one converter and addressable by respective ones of the microwave signals at different frequencies.

Abstract: There is provided a method and device for forwarding a digital signal arranged into portions that each contain a timestamp and an error detection code. Duplicates of the digital signal are received on a first optical path and a second, separate optical path. Corresponding timestamps are identified in the signals and used to synchronize corresponding portions of the signals. The error detection codes in the synchronized portions are used to allow one and only one of the corresponding portions to be selected for forwarding. The selected portions are then forwarded.

Abstract: A photonic integrated circuit comprises an optical deinterleaver, including an input region, a dispersive region, and at least two output regions. The input region is adapted to receive an input optical signal including a plurality of channels. The dispersive region is optically coupled to the input region to receive the input optical signal. The dispersive region includes an inhomogeneous arrangement of a first material and a second material to structure the dispersive region to separate the input optical signal into a plurality of multi-channel optical signals, including a first multi-channel optical signal and a second multi-channel optical signal. The at least two output regions, include a first out region and a second output region optically coupled to the dispersive region. The first output region is positioned to receive the first multi-channel optical signal and the second output region is positioned to receive the second multi-channel optical signal.

Abstract: An optical module includes: a casing; a printed circuit board (PCB) connected to a first side wall of the casing and configured to provide first electrical signals to an optical transmitter assembly; the optical transmitter assembly arranged in the casing and configured to convert the first electrical signals into first optical signals; an optical receiver adapter and an optical transmitter adapter arranged outside the casing and connected to a second side wall of the casing, wherein the optical transmitter adapter is configured to receive second optical signals; a first displacement prism arranged in the casing and configured to direct the second optical signals toward an optical receiver assembly; and the optical receiver assembly configured to convert the second optical signals into second electrical signals. At least one component of the optical receiver assembly is arranged in the casing.

Abstract: A multi-channel wavelength division multiplexing light emitting device includes a casing and an optical communication assembly accommodated in the casing. The optical communication assembly includes a substrate, a plurality of first light emitting units disposed on the substrate, a plurality of second light emitting units disposed on the substrate, a first wavelength division multiplexer, and a second wavelength division multiplexer. The first light emitting units are arranged to correspond with the first wavelength division multiplexer. The second light emitting units are arranged to correspond with the second wavelength division multiplexer.

Abstract: According to an example, a transmitter transmits a plurality of optical signals of multiple wavelengths via an optical link to a receiver. An optical link tuner coupled to the optical link groups the plurality of optical signals into a first group of optical signals and a second group of optical signals, where the first group of optical signals has a first wavelength range and the second group of optical signals has a second wavelength range. The optical link tuner adjusts link tuning parameters associated with the first group of optical signals during a first phase, such that the second group of optical signals is propagated to the receiver without modifications to link tuning parameters associated with the second group, where during the first phase the receiver is to detect unplugging of the optical link based on the second group of optical signals.

Abstract: A wireless radio frequency conversion system is disclosed. The wireless radio frequency conversion system includes a wireless radio frequency transmit-receive device, a first conversion device, at least one optical fiber, a second conversion device, and a wireless radio frequency transmission device. The wireless radio frequency transmit-receive device performs a conversion and a transmit-receive manner to at least one radio frequency signal and at least one data signal. The first conversion device performs a conversion to the at least one data signal and at least one optical signal. The optical fiber transmits the at least one optical signal. The second conversion device performs a conversion to the at least one optical signal and the at least one data signal. The wireless radio frequency transmission device performs a conversion and a transmit-receive manner to the at least one data signal and the at least one terminal signal.

Abstract: An optical transmitter includes: a modulator, square law detector, and a processor. The modulator generates an optical signal indicating transmission data. The square law detector detects an intensity of the optical signal using a photodetector and output first intensity data indicating the detected intensity. The processor calculates, based on the transmission data, an electric field of the optical signal generated by the modulator by using parameters pertaining to a state of the modulator. The processor calculates second intensity data indicating the intensity of the optical signal based on the calculated electric field. The processor updates the parameters so as to reduce a difference between the first intensity data and the second intensity data. The processor controls the state of the modulator based on the parameters.

Abstract: Optical communication systems and their method of operation are disclosed. In some embodiments, one or more images of one or more optical transmitters may be collected with an imaging device during relative motion between the imaging device and the one or more optical transmitters. The one or more optical transmitters may transmit bit stream segments as a pattern of sequential modulation cycles. The relative motion between the imaging device and the one or more optical transmitters may be sufficiently fast and an image integration time of the imaging device may be sufficiently long such that one or more bit stream segments transmitted by the one or more optical transmitters may be captured as one or more data traces in the images for subsequent decoding.

Abstract: Data transceiving electronic device (100), configured to permit the establishment of at least a communication with at least an electronic device (301; 302) remotely positioned with respect to the data transceiving electronic device (100), said data transceiving electronic device (100) comprises a radio frequency module (105) configured to receive and transmit electronic data on a wireless channel according to at least a predefined first wireless communication standard, and an optical transceiver module (108) in turn comprising at least an optical transmitter (109) and an optical receiver (110); said data transceiving electronic device (100) being configured to select said optical transceiver module (108) as the preferential priority module for the establishment of said communication with said at least one electronic device (301; 302).