Patent ID: 9008503
Filing Date: 2015-04-14
Classification: G01M,H04B,H04J

Abstract:
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: 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.