Optical communications networks, optical line terminations and related methods

摘要

Wireless communication systems are provided including a transmitter and a receiver. The transmitter is configured to transmit a first polarized signal and a second polarized signal to the receiver, and in accordance with an instruction from the receiver, halt transmission of the second polarized signal. The receiver is configured to receive the polarized signals from the transmitter, determine whether or not the reception quality of the second polarized signal is below a threshold, and if so, instruct the transmitter to halt transmission of the second polarized signal.

主权项

1. An optical communications network comprising:
an optical line termination; a first optical multiplexer/demultiplexer comprising a first plurality (N) of input ports and a first plurality (N) of output ports; a plurality of wavelength division multiplexed passive optical network distribution networks, each coupled to a respective one of the plurality of output ports; a plurality of optical network units; a plurality of feeder fibers, each coupled between the optical line termination and a respective one of the plurality of input ports; and a plurality of interconnection fibers each coupled between a respective pair of the plurality of optical network units, wherein each wavelength division multiplexed passive optical network distribution network comprises one of: a wavelength routed wavelength division multiplexed passive optical network distribution network comprising a second optical multiplexer/demultiplexer comprising an input port and a second plurality (N′) of output ports; a broadcast and select passive optical network distribution network comprising an optical splitter comprising an input port and a plurality (N″) of output ports; and a hybrid wavelength division multiplexed/time division multiplexed passive optical network distribution network comprising a second optical multiplexer/demultiplexer comprising an input port and a second plurality (N′) of output ports each coupled to a respective optical splitter comprising an input port and a plurality of output ports, wherein a first network unit and a second network unit of said plurality of optical network units are paired to protect one another dependent on an identity of the second optical multiplexer/demultiplexer, an identity of the output port of the second optical multiplexer/demultiplexer, to which the first and second network units are respectively coupled, an identity of a free spectral range of the first optical multiplexer/demultiplexer used by each output port, the number of working feeder fiber (L) and an identity of the backup feeder fiber of each of the first and second network units.