摘要:
Disclosed herein is an apparatus comprising a plurality of separators configured to forward a plurality of optical signals from a plurality of optical network terminals (ONTs) along a plurality of single mode waveguides, a mode coupler coupled to the single mode waveguides and configured to receive the optical signals from the plurality of separators and combine the optical signals into a multi-mode waveguide, and an optical receiver coupled to the mode coupler via the multi-mode waveguide and configured to detect the optical signals. Also disclosed is a method comprising receiving a plurality of single mode optical channels, coupling the single mode optical channels into a multimode channel, and detecting the optical modes corresponding to the channels in the multimode channel.
摘要:
The present invention discloses a framing method and apparatus in a passive optical network and a system. The method includes: generating a first gigabit-capable passive optical network transmission convergence TC frame and a second TC frame separately, where a sum of frame lengths of the first TC frame and the second TC frame is 125 microseconds, and an interval between frame headers of second TC frames is 125 microseconds; performing bit mapping on the second TC frame to generate a third TC frame, where the bit mapping refers to identifying each bit of the second TC frame by using N bits; and sending the first TC frame and the second TC frame to an optical network unit. In the framing method, a line rate corresponding to the second TC frame is lower than 2.488 Gbps, so that a rate of a receiver on a receiving side is decreased and a bandwidth of the receiver is narrowed, thereby decreasing an optical link loss and increasing an optical power budget.
摘要:
An Optical Network Unit (ONU) in a Passive Optical Network (PON), the ONU comprising: a receiver module configured to receive a first rate selection signal from an optical line terminal (OLT) that indicates a reduced rate mode, and a component comprised within the receiver module, the component configured to transition from a normal operation mode to the reduced rate mode in response to the receiver module receiving the first rate selection signal, wherein operating in the normal operation mode comprises receiving a downstream signal from the OLT at a nominal data rate, and wherein operating in the reduced rate mode comprises receiving the downstream signal from the OLT at a reduced data rate that is less than the nominal data rate but greater than zero.
摘要:
An Optical Network Unit (ONU) in a Passive Optical Network (PON), the ONU comprising: a receiver module configured to receive a first rate selection signal from an optical line terminal (OLT) that indicates a reduced rate mode, and a component comprised within the receiver module, the component configured to transition from a normal operation mode to the reduced rate mode in response to the receiver module receiving the first rate selection signal, wherein operating in the normal operation mode comprises receiving a downstream signal from the OLT at a nominal data rate, and wherein operating in the reduced rate mode comprises receiving the downstream signal from the OLT at a reduced data rate that is less than the nominal data rate but greater than zero.