摘要:
A communication system (200, 200a-e) includes a first and second trunk terminals (110, 110a-b), a plurality of communication trunks (222, 400), and power feed equipment (212). Each communication trunk couples the first trunk terminal to the second trunk terminal and includes at least one signal amplifier (300) configured to amplify a signal (266) conveyed along the corresponding communication trunk. The power feed equipment is coupled to the plurality of communication trunks and is configured to deliver power along each communication trunk to power the at least one signal amplifier of the communication trunk. The power feed equipment is also configured to receive a shunt fault notification (214) identifying an electrical shunt fault along a faulted communication trunk of the plurality of communication trunks. In response to the shunt fault notification, the power feed equipment is configured to cease delivery of power along at least one communication trunk.
摘要:
Systems and methods for performing wavelength conflict detection are provided. These are to detect situations in optical networks where two instances of the same wavelength channel have been added. Wavelength conflict detection is performed for each of a plurality of possible wavelength channels that could be present in an optical signal, each wavelength channel that is present modulated by a pilot tone signal with a respective pilot tone frequency, the pilot tone signal carrying M-ary pilot tone data, M=2 n , n≥1, with a respective one of M different sequences being used to represent each of M possible data values over a data value period. Conflict detection for each wavelength channel involves performing correlation peak detection using each of the M different sequences to determine correlation peaks for each of the M different sequences, and, based on the determined correlation peaks, determining whether multiple instances of the wavelength channel are present in the optical signal.
摘要:
An optical transceiver assembly includes a thermal dual arrayed waveguide grating (AWG) for both multiplexing and demultiplexing optical signals. The thermal dual AWG may be used as an optical multiplexer/demultiplexer with an array of laser emitters and an array of photodetectors to provide a transmitter optical subassembly (TOSA) and a receiver optical subassembly (ROSA) in the optical transceiver assembly. The thermal dual AWG may be formed as a single chip, and a temperature control device, such as thermoelectric cooler (TEC), may be used in the transceiver to stabilize the temperature of the AWG. In an embodiment, an external reflector may be used at a transmit output of the dual AWG to complete the lasing cavities after the AWG, thereby providing a laser array mux assembly. The optical transceiver device may also be part of a larger system, such as a wavelength division multiplexed (WDM) passive optical network (PON).
摘要:
A communication system (100) includes a first optical system (242, 242a) and a second optical system (270) optically connected to a clamping laser (202) and a pump laser (204). The first optical system includes first and second optical splitters (244, 244a, 244b). The first optical splitter receives a clamping laser signal (203) from the clamping laser and splits the signal into split clamping laser signals (203a, 203aa-an). The second optical splitter receives a pump laser signal (205) from the pump laser and splits the signal into split pump laser signals (205a, 205aa-an). The second optical system is optically connected to the first optical system and includes amplifier systems (200), which receive a multiplexed signal (220u). The second optical system includes first and second combiners (212, 212a, 212b) optically connected to an erbium-doped fiber (230) and the first and second splitters, respectively.
摘要:
A data transceiver module, data transmission system incorporating same and methods related thereto, which include optical transmitters configured to receive an information bearing signal and generate an optical signal having a wavelength different from wavelengths generated by others of the plurality of optical transmitters; optical receivers configured to receive an optical signal having a wavelength matching one of the plurality of optical transmitters and convert it to an information bearing electrical signal; and a four level pulse-amplitude-modulator (PAM4) chip generating a pulse-amplitude-modulated information bearing signal input to at least one optical transmitter of the plurality of optical transmitters and receiving the information bearing from at least one optical receiver of the plurality of optical receivers and converting it to an information signal using pulse amplitude demodulation. Alternative embodiments include coherent-detection-based optical coherent receiver and coherent transmitter.
摘要:
A radio frequency over glass (RFoG) system may be modified to extend a downstream band. A transimpedance amplifier with a downstream path may be used in the RFoG system in combination with an upstream path having greater than 200 MHz radio frequency (RF) bandwidth to provide the greater than 1.2 GHz downstream bandwidth overlapping with the greater than 200MHz upstream bandwidth. The RFoG system may include a gateway facilitating an optical network unit and modem connection, the gateway having an express upstream port and an express downstream radio frequency (RF) port. The gateway may be configured for processing legacy RFoG signals in an upstream and a downstream direction and for at least one of generating or processing, via the express ports on the modem, RFoG signals in an extended spectrum beyond 42 MHz in the upstream direction and beyond 1000 MHz in the downstream direction.