Alcatel Lucent

Ronald Heron

Thomas Pfeiffer

Joseph Lee Smith

Wolfgang Poehlmann

Wolfgang Pöhlmann

In one embodiment, a media access controller includes first and second optical line terminals with a receiver for adjacent first and second wavelength ranges, respectively, and an optical network unit with a transmitter having a transmitter wavelength which drifts between the first and the second wavelength range. The media access controller is configured to assign the optical network unit to the first and the second optical line terminals, such that an optical burst transmitted by the optical network unit is received by the first optical line terminal and the second optical line terminal. The media access controller is configured to determine first and second qualities of the optical burst received by the first and second optical line terminals, respectively, and to determine an estimate of the transmitter wavelength based on the first quality and the second quality.

WDM PON with non tunable legacy ONUs

A manner of providing for testing of access fibers in a PON (passive optical network) using OTDR (optical time-domain reflectometry). According to the invention, a PON includes an optical splitter module having one or more optical couplers that combines downstream light from 1&#xd7;N optical splitter directing the output of an OLT (optical line terminal) and a cyclic AWG (arrayed waveguide grating) for transmission toward one or more ONUs (optical network units). The splitter module is preferably formed on a single semiconductor chip, such as a PIC (photonic integrated circuit) chip and may reside in an outside plant of the PON.

Growing community of inventors

Rigaud, Canada

Ronald Heron