Supervision of wavelength division multiplexed optical networks

摘要

An arrangement in a node in a WDM-PON and a method therein for supervision of the WDM-PON are provided. The arrangement comprises X splitters of splitting ratio 1:Y, each splitter having one input and Y outputs such that X*Y equals N, wherein X, Y, N are integers. The one input of each of the X splitters is configured to receive an Optical Time Domain Reflectometry, OTDR, signal and to split the received OTDR signal into Y OTDR sub-signals such that a total of N OTDR sub-signals are outputted from the X splitters. The arrangement further comprises an N*N Arrayed Waveguide Grating, AWG, and a first filter configured to mix a feeder signal comprising data communication from an Optical Line Termination, OLT, with one of the N OTDR sub-signals. One input of the AWG is configured to receive the mix of the feeder signal and the one OTDR sub-signal, and the remaining N-inputs of the AWG are each configured to receive a respective one of the N-remaining OTDR sub-signals.

主权项

1. An arrangement in a node in a Wavelength Division Multiplexed Passive Optical Network (WDM-PON) for supervision of the WDM-PON, the arrangement comprising:
X splitters each having a splitting ratio of 1:Y, each splitter having one input and Y outputs such that X*Y equals N, wherein:
X, Y, and N are integers;the one input of each of the X splitters is configured to receive an Optical Time Domain Reflectometry (OTDR) signal; andeach of the X splitters is configured to split the received OTDR signal into Y OTDR sub-signals such that a total of N OTDR sub-signals are output from the X splitters; an N*N Arrayed Waveguide Grating (AWG); and a first filter configured to mix a feeder signal comprising data communication from an Optical Line Termination (OLT) with one of the N OTDR sub-signals; wherein one input of the AWG is configured to receive the mix of the feeder signal and the one OTDR sub-signal, and the remaining N−1 inputs of the AWG are each configured to receive a respective one of the N−1 remaining OTDR sub-signals, thereby enabling supervision of the WDM-PON without influencing the data communication.