Multichannel WDM-PON module with integrated OTDR function

摘要

The present document relates to passive optical networks (PON). In particular, it relates to the cost efficient provisioning of an OTDR (optical time-domain reflectometer) into multichannel Wavelength Division Multiplexing-PON (WDM-PON) modules. A WDM-PON transmitter configured to analyze an optical fiber and a corresponding method are described. The transmitter (200) comprises a plurality of light sources (111, 112) configured to respectively generate a plurality of optical signals at different wavelengths; a multiplexing unit (113) configured to combine the plurality of optical signals for transmission over the optical fiber (121); a tapping unit (230) downstream of the merging unit (113) configured to extract a backscattered optical signal from the fiber (121); and analysis means configured to analyze the backscattered optical signal.