Abstract: An optical network communication system utilizes a CPON. The system includes an OLT and an ONU. The OLT includes an OLT transmitter for transmitting a downstream signal, and an OLT receiver for detecting an upstream signal. The downstream signal includes a first tone centered at a first frequency, a second tone centered at a second frequency, and first and second downstream subcarriers distributed proximate the first frequency. The upstream optical signal includes first and second upstream subcarriers distributed proximate the second frequency. The ONU includes an ONU receiver for detecting the first and second downstream subcarriers using the first optical tone to generate an LO signal for coherent detection, and an ONU transmitter configured to generate the first and second upstream subcarriers using the second optical tone.

Abstract: A first coherent transceiver for a CPON includes a MAC layer for enabling dual-mode operation of the first coherent transceiver, a software management and control module for communicating with a second transceiver over an ODN communication channel, a coherent DSP in communication with the software management and control module and configured to process a digital signal from the MAC layer, and an optics infrastructure configured to transmit and receive analog data signals over the ODN to and from the second transceiver, respectively. The analog data signals include a communication subcarrier and a data subcarrier. The digital data signal includes a first data portion with control information from the communication subcarrier, and a second data portion with primary information from the data subcarrier. The coherent DSP further dynamically reconfigures digital data signal processing between first and second operational modes based on a transport type of the data channel subcarrier.

Abstract: A passive optical tap includes a first wavelength division multiplexer (WDM), a second WDM, a first optical splitter, and a second optical splitter. The first wavelength division multiplexer (WDM) has a first plurality of single-channel ports. The second WDM has a second plurality of single-channel ports. The first optical splitter has a first combined-power port optically coupled to a first one of the first plurality of single-channel ports and a first split-power port optically coupled to a first one of the second plurality of single-channel ports. The second optical splitter has a second combined-power port optically coupled to a second one of the second plurality of single-channel ports and a second split-power port optically coupled to a second one of the first plurality of single-channel ports.

Abstract: A CPON includes an OLT for transmitting a downstream signal to a plurality of remote ONUs. The downstream signal includes a first data subcarrier and a second subcarrier adjacent the first subcarrier, and a first communication subcarrier between the first and second subcarriers. The CPON further includes a first ONU having a first ONU receiver for receiving the first data subcarrier from the downstream optical signal within a first channel bandwidth, and a first ONU transmitter for transmitting a first upstream signal to the OLT within the first channel bandwidth. The CPON further includes a second ONU having a second ONU receiver for receiving the second data subcarrier from the downstream optical signal within a second channel bandwidth, and a second ONU transmitter for transmitting a second upstream signal to the OLT within the second channel bandwidth. The first communication subcarrier includes OAM management data and/or MAC layer control information.

Abstract: Adaptive modulation coding schemes improve spectral efficiency of telecommunication networks by implementing MCSs specific to each of a plurality of end devices in operable communication with a hub. For example, the MCSs may be specific to a channel, a wavelength, a distance, or capabilities of an end device. The MCSs are selected to include the highest modulation format and highest forward error correction coding rate that can be applied to a telecommunication signal without surpassing a signal parameter threshold.

Abstract: A substation inspection device includes a rack, an anti-vibration mechanism, a camera apparatus and a lock-stop apparatus. The anti-vibration mechanism is mounted on the rack. The camera apparatus includes a first mounting seat and a camera assembly. The first mounting seat is mounted on the rack through the anti-vibration mechanism. The camera assembly is mounted on the first mounting seat. The lock-stop apparatus is mounted on the rack and is configured to fix the camera apparatus.

Abstract: A substation inspection device includes a rack, an anti-vibration mechanism, a camera apparatus and a lock-stop apparatus. The anti-vibration mechanism is mounted on the rack. The camera apparatus includes a first mounting seat and a camera assembly. The first mounting seat is mounted on the rack through the anti-vibration mechanism. The camera assembly is mounted on the first mounting seat. The lock-stop apparatus is mounted on the rack and is configured to fix the camera apparatus.

Abstract: An optical full-field transmitter (OFFT) includes a plurality of optical circulators and a polarization beam combiner. The plurality of optical circulators are fabricated on a silicon-on-insulator (SOI) substrate, where each of the optical circulators has (a) a first port that optically couples to a high-quality optical source, (b) a second port that optically couples to a child laser configured to receive amplitude modulation data, and (c) a third port optically coupled to a phase modulator that (i) is configured to receive a phase modulation data and (ii) includes an output port that outputs amplitude and phase modulated light. The polarization beam combiner receives the amplitude and phase modulated light from each of the optical circulators and outputs combined amplitude and phase modulated light.

Abstract: An example operation may include one or more of receiving a loan application of a user, extracting a plurality of personal attributes about the user from the loan application, querying a machine learning model via an application programming interface (API) based on the plurality of attributes about the user to identify one or more rules for auto-adjudicating the loan application, determining whether or not to approve the loan application based on the one or more rules identified via the machine learning model, and transmitting notice of the determination to a device associated with the user.

Abstract: Provided in the present disclosure are an aramid aerogel and a preparation method thereof. The aramid aerogel is a porous material, and the porosity of the aramid aerogel is 65-99%. By means of the preparation method in the present disclosure, an aramid material having good high heat resistance may be prepared into the aramid aerogel, such that the aramid aerogel is suitable for industrial production. An application range of the aramid aerogel is expanded by owning the aramid aerogel with the above porosity. In addition, the aramid aerogel has good structure and mechanical properties and excellent thermal insulation performance, and in particular, has a very good application prospect in the field of high temperature thermal insulation.

Abstract: A method for tuning a power characteristic of an optical frequency comb includes controlling a modulating light source according to a plurality of modulation parameters to generate an optical frequency comb including a plurality of optical tones. Additionally, at least one of the plurality of modulation parameters is changed until a total power of the plurality of optical tones is greater than or equal to a minimum threshold value. Furthermore, at least one of the plurality of modulation parameters are changed until respective powers of each of the plurality of optical tones are within a predetermined proximity to respective target powers of each of the plurality of optical tones.

Abstract: A beam steering subsystem is provided in an optical communication system. The beam steering subsystem is configured for steering a free-space optical (FSO) beam from a first transceiver to a second transceiver disposed remotely from the first receiver. The beam steering subsystem includes a beam steering device disposed between the first transceiver and the second transceiver, and an optical tracking unit in optical communication and electrical communication with the beam steering device. The wherein the beam steering device is further configured to (i) receive the FSO beam from the first transceiver, (ii) receive an optical tracking signal from the second transceiver, (iii) optically relay the received optical tracking signal to the optical tracking unit, and (iv) steer the FSO beam to the second transceiver based on an electrical feedback control signal from optical tracking unit.

Abstract: A method for controlling a device, including: determining a distance state between a keyboard and a terminal device, the keyboard is in communication connection with the terminal device; in a case that the distance state is a distant state, adjusting a state of a screen of the terminal device to a wake-up state, and obtaining a first position of the keyboard and a second position of the terminal device; determining an angle between the keyboard and the screen of the terminal device according to the first position and the second position; and adjusting a state of the keyboard according to the angle.

Abstract: A fiber-optic network that uses as a hybrid telecommunication and sensing system when telecommunication signals and probe signals are transmitted across a shared fiber strand in either a co-propagated or counter-propagated direction is disclosed. Probe signals generated by a sensing termination system and/or by one or more end devices are used to analyze conditions affecting network hardware and/or events occurring within the fiber distribution area.

Abstract: A method for allocating bandwidth to a first ONU, a second ONU, M1 ONUs, and M2 ONUs includes, during an allocation cycle, (i) granting a respective upstream time slot to, of a plurality of N ONUs, only each of the M1 ONUs, and (ii) granting a first upstream time slot to the first ONU. Each of the M1 ONUs and M2 ONUs is one of the plurality of N ONUs. The method also includes, during a subsequent cycle, (i) granting a respective upstream time slot to, of the plurality of N ONUs, only each of the M2 ONUs. The N ONUs includes a skipped-ONU that is one of either, and not both, the M1 ONUs and the M2 ONUs. The method includes, during the subsequent allocation cycle, granting a second upstream time slot to a second ONU, which is not one of the plurality of N ONUs.

Abstract: A passive optical tap includes a first wavelength division multiplexer (WDM), a second WDM, a first optical splitter, and a second optical splitter. The first wavelength division multiplexer (WDM) has a first plurality of single-channel ports. The second WDM has a second plurality of single-channel ports. The first optical splitter has a first combined-power port optically coupled to a first one of the first plurality of single-channel ports and a first split-power port optically coupled to a first one of the second plurality of single-channel ports. The second optical splitter has a second combined-power port optically coupled to a second one of the second plurality of single-channel ports and a second split-power port optically coupled to a second one of the first plurality of single-channel ports.

Abstract: Adaptive modulation coding schemes improve spectral efficiency of telecommunication networks by implementing MCSs specific to each of a plurality of end devices in operable communication with a hub. For example, the MCSs may be specific to a channel, a wavelength, a distance, or capabilities of an end device. The MCSs are selected to include the highest modulation format and highest forward error correction coding rate that can be applied to a telecommunication signal without surpassing a signal parameter threshold.

Abstract: A method for extracting a plurality of data streams from a time-frequency division multiplexed (TFDM) signal includes determining a plurality of sub-channels of the TFDM signal, where each of the plurality of sub-channels has a respective one of a plurality of frequency ranges. The method also includes down-converting, based on the plurality of frequency ranges, the TFDM signal into a plurality of down-converted signals, where each down-converted signal corresponds to a respective one of the plurality of sub-channels. The method also includes extracting the plurality of data streams from a respective one of the plurality of down-converted signals.

Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.

Abstract: A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to (i) transmit a downstream optical signal at a first wavelength, and (ii) simultaneously receive an upstream optical signal at a second wavelength. The second coherent optics transceiver is configured to (i) receive the downstream optical signal, and (ii) simultaneously transmit the upstream optical signal. The first wavelength has a first center frequency separated from a second center frequency of the second wavelength.