ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,381,648, issued on Aug. 5, was assigned to Infinera Corp. (San Jose, Calif.).

"Probabilistic constellation shaping for point-to-multipoint optical fiber communication systems employing subcarriers" was invented by Christopher R. Fludger (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Consistent with the present disclosure, a transmitter is provided in a hub node of a point-to-multi-point optical communication system. The transmitter supplies a plurality or group of optical subcarriers, each subgroup of the group of optical subcarriers in, one example, is associated with a respective leaf node. Since the leaf nodes may be located at diffe...