Abstract: A signal transmission system that includes a plurality of transceivers that transmits and receives an optical signal, a gateway that receives the optical signal transmitted by the transceiver, performs optical-electrical conversion and electrical-optical conversion for the received optical signal, and outputs the converted optical signal, an optical switch, a transceiver control unit that controls an operation of the transceiver, and a management unit that determines the wavelength of the optical signal transmitted by the transceiver, in which the management unit determines the wavelength of the optical signal to be transmitted by a transmission-scheduled transceiver that is the transceiver scheduled to transmit the optical signal according to a predetermined rule in a case of acquiring transmission schedule notification information indicating the transmission-scheduled transceiver, and after the determination of the wavelength, the transceiver control unit causes the transmission-scheduled transceiver to tra

Abstract: A wavelength division multiplexing (WDM) optical interconnect system may comprise a frequency comb generator configured to generate multiple optical wavelengths. A demultiplexing optical spectrometer may separate the multiple optical wavelengths. A processor chip may comprise a plurality of optical waveguides and modulators. The optical waveguides may direct individual optical signals to the modulators. The modulators may be internal to and integral with the processor chip. Output waveguides may direct modulated optical signals to separate networked devices. The modulators may be arranged in a three-dimensional array within the processor chip. The demultiplexing optical spectrometer may comprise an input for receiving optical signals, a collimating lens, a diffraction grating, and an output focusing lens. The input for receiving optical signals may be arranged in a two-dimensional array.

Abstract: An on-chip integrated wavelength division multiplexer, including a bus waveguide and at least two cascaded wavelength division multiplexing units disposed on the bus waveguide. Each of the wavelength division multiplexing units comprises two input ports and one output port, and is used for combining two optical signals received by the two input ports and outputting the combined optical signal from the output port, so as to implement multiplexing of incident optical signals of different wavelengths. By means of the structure in which the at least two wavelength division multiplexing units are cascaded, a relatively wide and flat-top passband can be provided for the on-chip integrated wavelength division multiplexer.

Abstract: Embodiments herein relate to an optical system coupled with or including a control logic. The control logic may be configured to identify, based on feedback provided by a photodiode (PD) of an optical receiver, that an amplitude of an optical marker signal output by an interferometer of the optical receiver is above a threshold value. The control logic may further be configured to adjust, based on the identification, a thermo-optic phase tuner of the interferometer, wherein adjustment of the thermo-optic phase tuner results in a change to the amplitude of the optical marker signal. Other embodiments may be described and/or claimed.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, an indication that the base station supports visible light communication (VLC). The UE may deactivate a radio frequency (RF) receiver of the UE based on the indication, and may receive a VLC message at a photo detector of the UE while the RF receiver of the UE is deactivated. In some examples, the UE may activate the RF receiver based on a content of the VLC message, which may include a physical cell identifier (PCI), a UE identifier, or a system information value tag, among other examples. Accordingly, the UE may communicate with the base station using the RF receiver. The described techniques may provide for reduced power consumption at the UE, among other benefits.

Abstract: A free-space optical communication terminal includes an optical antenna configured to receive, through a first aperture, a laser beam characterized by wavelengths in a first wavelength range, a collimator configured to couple the received laser beam into an optical fiber, a receiver subsystem comprising a first bandpass filter characterized by a pass band including the first wavelength range, a transmitter subsystem configured to generate a laser beam to be transmitted through the first aperture by the optical antenna and characterized by wavelengths in a second wavelength range outside of the pass band of the first bandpass filter, and a circulator coupled to the optical fiber, the receiver subsystem, and the transmitter subsystem. The circulator is configured to direct the received laser beam from the optical fiber to the receiver subsystem, and direct the laser beam to be transmitted from the transmitter subsystem to the optical fiber.

Abstract: An optical communication system includes at least one wave division multiplex (WDM) transmitter configured to generate WDM signals in multiple channels on a light guide, and a Code Division Multiple Access (CDMA) symbol generator coupled to modulate output of the WDM transmitter at a frequency below a noise floor of the WDM signals.

Abstract: Aspects of the subject disclosure may include, for example, determining whether a first device is communicating under a bandwidth surplus with a fixed network, wherein the bandwidth surplus results at least in part from use by the first device of one or more link aggregation groups, wherein the one or more link aggregation groups comprise one or more satellite broadband communication channels as well as licensed cellular wireless spectrum, unlicensed wireless spectrum, or a combination of the licensed cellular and unlicensed spectrum; determining whether a second device is communicating under a bandwidth deficit with the fixed network; and responsive to the first device communicating under the bandwidth surplus and responsive to the second device communicating under the bandwidth deficit, allocating at least a portion of the bandwidth surplus associated with the first device to the second device. Other embodiments are disclosed.

Abstract: Method for detecting an electromagnetic use-signal (2401) comprising: providing an use-signal; Providing a reference signal (2201) comprising M discrete tones with M?2; splitting the use-signal into N partial use-signals (2511) with N?2; splitting the reference signal into N partial reference signals (2521); mixing each partial use-signal (2511-n) with the corresponding partial reference signal (2521-n) to generate (I) partial mixing signals (2531), wherein the nth mixing element (2530-n) generates Kn partial mixing signals (2531-n); digitizing the partial mixing signals (2531) that (I) digitized partial mixing signals (2541) are generated; reconstructing the use-signal (2551) using a transformation that relates partial mixing signals to the use-signal and that comprises at least one model parameter related to a measurement property, characterized in that: at least one partial reference signal comprises at least two spectral tones, and the (I) of the partial mixing signals comprises redundant information to d

Abstract: A mapping and multiplexing method for an optical transport network, an electronic device, and a storage medium are provided. The method includes: first providing a mapping opportunity generated by an OPU in a current transport window to one or more OSU services, which satisfy a first scheduling condition, in a first queue, and performing in-queue scheduling on the one or more OSU services; in a case where there is no OSU service satisfying the first scheduling condition in the first queue, providing the mapping opportunity to one or more OSU services, which satisfy a second scheduling condition, in a second queue, and performing in-queue scheduling on the one or more OSU services; updating a remaining service mapping opportunity quantity of the OSU service which gets the mapping opportunity; and dynamically allocating OSU services entering mapping and multiplexing in the current transport window to the first queue and the second queue.

Abstract: An optical network unit, ONU, for a passive optical network, PON. The ONU comprises a tunable receiver having a wavelength tunable operating wavelength, a tunable transmitter having a wavelength tunable operating wavelength and a controller comprising at least one processor and memory.

Abstract: The optical tracking module includes an optical phased array (OPA), an analog drive, an integrated photodetector, and one or more processors. The OPA includes a plurality of array elements, and a plurality of phase shifters. The analog drive is configured to adjust the plurality of phase shifters. The integrated photodetector is configured to receive light from the OPA. The one or more processors is configured to extract signal information of an incoming beam via the OPA, and control an outgoing beam using the analog drive based on the signal information. The OPA, the analog drive, the integrated photodetector and the one or more processors are in an integrated circuit.

Abstract: The multi-wavelength phase stabilization system employs a broadband light source producing a continuous range of wavelengths that include the plurality of discrete optical wavelengths corresponding to the wavelengths to be stabilized. An interferometric mixing system receives the broadband light and the wavelengths to be stabilized, producing a plurality of interference patterns associated with the discrete optical wavelengths. A detecting system produces plural electrical signals based on the intensity of the interference patterns and feeds a control system which produces phase lock-in control signals based on feedback from the electrical signals. A phase shifting system driven by the control system independently adjusts each of the plural discrete optical signals to a stabilized phase, such that the plural discrete optical signals are phase-stabilized to a common reference point.

Abstract: An optical communication device includes an optical transmitter configured to transmit data over an optical link. The optical communication device also includes a memory having a configuration location of one or more bytes, and one or more registers storing a default transmit power value. The optical communication device also includes a controller configured to access the configuration location. In response to determining that no valid transmit power value is indicated by information stored in the configuration location, the controller accesses the one or more registers to read the default transmit power value, and sets a transmit power level of the optical transmitter to the default transmit power value.

Abstract: An optical signal monitor, including: a storage that holds a threshold value set for each of determination areas having a bandwidth set in accordance with an average grid of dummy light; a measurement section that sequentially measures an optical intensity of an inputted wavelength-multiplexed optical signal with respect to each of measurement areas obtained by dividing the determination area into areas with a bandwidth sufficiently smaller than a grid width of a monitoring-target optical signal composing the wavelength-multiplexed optical signal, and output measured values; and a section that determines that dummy light corresponding to the determination area needs introducing if each of measured values in the determination area is smaller than a threshold value, and, determines that dummy light corresponding to the determination area does not need introducing if at least one of the measured values in the determination area is equal to or larger than the threshold value.

Abstract: A method of communication includes notify, by an optical line terminal (OLT), an optical network unit (ONU) a first time period assigned to a first power saving operation and a second time period assigned to a second power saving operation, and perform, by the OLT, the second power saving operation for a receiver of the OLT during the second time period and the first power saving operation for a transmitter of the OLT during the first time period.

Abstract: A optical transmission device that includes a light source, a spatial light modulator including a modulation part where a plurality of modulation regions that is irradiated with light emitted from the light source is set, a wave plate disposed in an optical path of modulated light that is modulated in each of the modulation regions set in the modulation part of the spatial light modulator, the wave plate converting the modulated light that is modulated in each of the modulation regions to mutually different polarization states, and a curved surface mirror having a curved reflection surface irradiated with the modulated light that is converted to the mutually different polarization states, the curved surface mirror reflecting the modulated light converted to the mutually different polarization states at a projection angle in accordance with a curvature of the reflection surface.

Abstract: The present disclosure relates to the technical field of campus local area networks (LANs), and particularly discloses a method and system for implementing multi-service bearer in a passive optical LAN (POL). The method includes: step S1: constructing a POL, and accessing an entire campus network at a bandwidth of Gigabit according to a point-to-multipoint star topology including three layers: a core layer, a convergence layer, and an access layer, to form a 10 Gbit backbone, wherein an optical network terminal enters a room and is deployed according to such a manner that one classroom or functional room has one terminal mode; step S2: planning and managing the entire POL, defining a plurality of LANs through software definition (SD-LAN), wherein different LANs bear different services; and step S3: allocating different service bandwidths to different LANs through a sharding mechanism of the PON, and the like.

Abstract: A transmission apparatus repeatedly inserts reference signal sequences into a transmission signal sequence at different timings, and converts the transmission signal sequence, into which the reference signal sequences are inserted, into an optical signal. The reception apparatus includes a detection unit, a waveform equalization unit, and a signal quality measurement unit. The detection unit receives the optical signal transmitted through an optical transmission line, and converts the received optical signal into a reception signal of an electrical signal. The waveform equalization unit performs waveform equalization on the reception signal converted into the electrical signal. The signal quality calculation unit extracts a reception signal sequence set in each section corresponding to the reference signal sequence from the received signal on which waveform equalization performed.

Abstract: A light-emitting assembly includes a laser, an optical isolator, and a polarization maintaining device. The laser is configured to emit a first optical signal; the polarization maintaining device is configured to receive a second optical signal; and the optical isolator includes a polarizer and an optical rotator. The laser, the polarizer, the optical rotator, and the polarization maintaining device are sequentially arranged, a polarization direction of the polarizer is the same as a polarization direction of the first optical signal, and the optical rotator is configured to deflect the first optical signal into the second optical signal.