Abstract: An optical transceiver configured to operate in a host device includes an electrical interface communicatively coupled to the host device to interface electrically with the host device, wherein the optical transceiver is compliant with a Multi-Source Agreement (MSA) which is supported by the host device; optical transceiver components communicatively coupled to the electrical interface, wherein the optical transceiver components are configured to optically interface signals with a second optical transceiver to form an optical link; and electronic dispersion compensation circuitry communicatively coupled to the optical transceiver components and configured to electronically compensate for optical fiber chromatic and/or polarization mode dispersion associated with the optical link, separate and independent from the host device.

Abstract: A bi-directional coupler assembly includes a first port for connecting to one of an input forward path RF signal line and an output forward path RF signal line. A second port connects to the other of the input forward path RF signal line and the output forward path RF signal line. A relay is connected between the ports and to at least one directional coupler. In a first state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the first port is directed through the at least one directional coupler in a first direction. In a second state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the second port is directed through the at least one directional coupler in said first direction.

Abstract: A detection device is provided with a holding body that holds a light-receiving module, an optical fiber pigtail, and a lens. The light-receiving module is provided with a light-receiving element and a stem that supports the light-receiving element. The lens collimates an input light from one end of an input fiber and guides a portion of the input light to the light-receiving element. The lens separates the input light into a transmitted light and a reflected light, guiding the transmitted light to the light-receiving element and guiding the reflected light to an output fiber. The light-receiving element has a center of a light-receiving surface thereof disposed in a position away from an axis of the stem.

Abstract: A visible light communication device includes a light-emitting unit, a switch-mode light-emitting diode (LED) driver, a synthesizing circuit, and a path selection circuit. The switch-mode LED driver provides a driving current for driving the light-emitting unit. The synthesizing circuit synthesizes a data signal and a dimming signal to form a synthesized signal. According to a data frequency and a dimming ratio obtained from one or more path selection information, the path selection circuit selects to turn on a bypass current modulation unit to inject the synthesized signal to the bypass current modulation unit along one path and the bypass current modulation unit controls the light-emitting unit according to the synthesized signal, or selects to inject the synthesized signal to the switch-mode LED driver along another path and the switch-mode LED driver controls the light-emitting unit according to the synthesized signal.

Abstract: Systems and methods for remotely controlling infrared (“IR”) enabled appliances via a networked device are described. The technology enables one or multiple users to control, monitor, and manage their appliances (e.g., air conditioners, television sets, multimedia systems, window curtains, etc.) both locally and remotely, irrespective of the users' location or their line of sight. In various embodiments, the technology includes a device with integrated Wi-Fi and IR subsystems connected via a cloud platform to a user application interface that can control appliances, generate analytics, schedule automatic operation, and perform smart learning operation.

Abstract: The present invention discloses an optical switching apparatus, an optical cross-connect node, and an optical signal switching method. The optical switching apparatus includes: N input ports, N OAM modulators in a one-to-one correspondence with the N input ports, an OAM splitter, and M output ports, where the M output ports are in a one-to-one correspondence with M OAM modes; a first input port of the input ports is configured to input a first optical signal, a target output port of the first optical signal is a first output port; a first OAM modulator corresponding to the first input port modulates the first optical signal into an optical signal of a first OAM mode corresponding to the first output port; the OAM splitter transmits, to the first output port, the first optical signal received from the first OAM modulator; and the first output port outputs the first optical signal.

Abstract: Apparatus and method for compensating for transmitter errors in an optical communication system are provided. In certain configurations herein, a receiver is provided for processing an analog signal vector representing an optical signal received from a transmitter. The receiver includes an analog front-end that converts the analog signal vector into a digital signal vector including a digital representation of an I component and a Q component of the optical signal. The receiver further includes a digital signal processing circuit configured to process the digital signal vector to recover data, and the digital signal processing circuit includes a transmitter error compensation system that compensates the digital signal vector for at least one of a transmit skew error of the transmitter or a modulator biasing error of the transmitter.

Abstract: Monolithic asymmetric optical waveguide grating resonators including an asymmetric resonant grating are disposed in a waveguide. A first grating strength is provided along a first grating length, and a second grating strength, higher than the first grating strength, is provided along a second grating length. In advantageous embodiments, the effective refractive index along first grating length is substantially matched to the effective refractive index along second grating length through proper design of waveguide and grating parameters. A well-matched effective index of refraction may permit the resonant grating to operate in a highly asymmetric single longitudinal mode (SLM). In further embodiments, an asymmetric monolithic DFB laser diode includes front and back grating sections having waveguide and grating parameters for highly asymmetric operation.

Abstract: A laser communication apparatus is provided for sending and receiving messages. A processor encodes user messages for a modulator. The modulator provides control signals related to the encoded message to a plurality of seed lasers. Each seed laser can provide light at a different wavelength. Amplifiers are joined to amplify light from the seed lasers. Amplified light is multiplexed together. Multiplexed light is transmitted by a collimating lens along a target vector. A portion of the light can be monitored by a first detector. A telescope receives light from the target vector and provides focused light to a second detector. The second detector provides a signal responsive to the received light to the processor. The processor decodes this signal to provide the received message.

Abstract: Embodiments of the present invention provide a method and an apparatus for virtualizing a passive optical network, and a passive optical network virtualization system. The method includes: receiving a virtualized passive optical network creation message, where the virtualized passive optical network creation message includes an ID of a to-be-created VPON and at least one wavelength flow identifier ?-flow ID; and establishing, according to the VPON ID and the at least one ?-flow ID, a communication connection relationship with at least one optical network unit in the virtualized passive optical network identified by the VPON ID. According to the method provided by the embodiments of the present invention, on one hand, complex networking performed to deal with different application scenarios is avoided.

Abstract: The receiver 11 for self-homodyne detection comprises a coherent detection system and a direct detection system. The receiver comprises a polarization splitter 13, a first splitter 15, a 90 degree polarization rotor 17, a hybrid detector 19, a first balanced detector 21, and a processor 23.

Abstract: Systems for a PLM configured active optical module (AOM) with native and non-native-network element support are provided. A system includes a non-native network element having a first port with a first inventory interface; a first pluggable AOM installed in the first port and coupled to the first inventory interface, where in response to a request to read a table entry the first pluggable AOM provides PLM information to the non-native network element; an extended network element having a second port with a second inventory interface; and a second pluggable AOM installed in the second port and coupled to the second inventory interface, where in response to a request to read a table entry, processing devices provide PLM information to the extended network element.

Abstract: Described herein are ground based subsystems, and related methods, for use in transmitting an optical feeder uplink beam to a satellite that is configured to receive the optical feeder uplink beam and in dependence thereon produce and transmit a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Also described herein are space based subsystems of a satellite, and related methods, for use in transmitting a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Beneficially certain embodiments eliminate the need for any frequency down-converters or any other type of frequency conversion equipment in a space segment forward link equipment. Also described herein is space segment return link equipment, and related methods, for use in transmitting an optical feeder downlink beam to a ground based subsystem, as well as ground based return link equipment thereof.

Abstract: An optical module includes an optoelectronic transceiver. The optical modules includes a heat sink. The heat sink includes a heat radiating element aligned along a length of the heat sink. The heat sink radiates heat received from the optoelectronic transceiver. The optical modules includes a housing. The optoelectronic transceiver is encapsulated by the heat sink and the housing.

Abstract: Described herein are ground based subsystems, and related methods, for use in transmitting an optical feeder uplink beam to a satellite that is configured to receive the optical feeder uplink beam and in dependence thereon produce and transmit a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Also described herein are space based subsystems of a satellite, and related methods, for use in transmitting a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Beneficially certain embodiments eliminate the satellite to perform any RF frequency conversions upstream of a channelizer of the space based forward link subsystem on the satellite. Also described herein is space segment return link equipment, and related methods, for use in transmitting an optical feeder downlink beam to a ground based subsystem, as well as ground based return link equipment thereof.

Abstract: A single-wavelength light path is selected between a source access node and a destination access node of a wavelength-division multiplexed optical network, including selecting an illuminated wavelength of the light path and selecting a start time and duration for a data transfer that would not interfere with other data transfers. If no start time/wavelength combination is available with duration sufficient to transport the data, an additional wavelength is automatically selected, based on modeling, that would not impair traffic being carried by other wavelengths in the network, and without a time-consuming manual process of the prior art. The scheduling process may include selecting a set of optical fibers, a wavelength, a start time and an end time to transport proposed traffic. A novel scheduler avoids checking every possible start time, thereby saving significant processing time. The scheduler schedules single-wavelength light paths, rather than relying on complex wavelength shifting schemes.

Abstract: An integrated apparatus with optical/electrical interfaces and protocol converter on a single silicon substrate. The apparatus includes an optical module comprising one or more modulators respectively coupled with one or more laser devices for producing a first optical signal to an optical interface and one or more photodetectors for detecting a second optical signal from the optical interface to generate a current signal. Additionally, the apparatus includes a transmit lane module coupled between the optical module and an electrical interface to receive a first electric signal from the electrical interface and provide a framing protocol for driving the one or more modulators. Furthermore, the apparatus includes a receive lane module coupled between the optical module and the electrical interface to process the current signal to send a second electric signal to the electrical interface.

Abstract: A method and apparatus for pro-active protection of packet-optical transport in a software defined network (SDN) controller are disclosed herein. The SDN controller may define a proactive protection threshold criterion based on based on a plurality of optical system performance metrics and may collect at least one measurement for each of the metrics. The SDN controller may then determine whether the proactive protection threshold criterion is met based on at least one of the collected measurements. Further, the SDN controller may select a protection mechanism and define a protection threshold criterion on a condition that the proactive protection threshold criterion is met. Also, the SDN controller may initiate proactive protection events based on the selected protection mechanism. The SDN controller may determine whether the protection threshold criterion is met. The SDN controller may implement one or more protection events on a condition that the protection threshold criterion is met.

Abstract: Apparatus and method for transmitter alignment in an optical communication system are provided. In certain configurations, a method of correcting for transmitter skew is provided. The method includes generating an optical signal using a transmitter based on an in-phase (I) component and a quadrature-phase (Q) component of a transmit signal, the optical signal having a baud rate that is based on a timing tone. The method further includes receiving the optical signal as an input to a receiver, and generating a signal vector representing the optical signal using the receiver. The signal vector includes an I component and a Q component. The method further includes calculating a power of the timing tone based on processing the signal vector using a tone power calculator of the receiver, and correcting for a skew of the transmitter based on the calculated power.

Abstract: An array of columns and rows of host server devices is mounted in a row of racks. Each device has a host processor and an exact-match packet switching integrated circuit. Packets are switched within the system using exact-match flow tables that are provisioned by a central controller. Each device is coupled by a first cable to a device to its left, by a second cable to a device to its right, by a third cable to a device above, and by a fourth cable to a device below. In one example, substantially all cables that are one meter or less in length are non-optical cables, whereas substantially all cables that are seven meters or more in length are optical cables. Advantageously, each device of a majority of the devices has four and only four cable ports, and connects only to non-optical cables, and the connections involve no optical transceiver.