ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,451,987, issued on Oct. 21, was assigned to Amazon Technologies Inc. (Seattle).

"Controlling transient effects in spectral changes due to channel drop scenarios" was invented by Diego Rodrigo Villafani Caballero (Dublin) and Lee Richardson (Dublin).

According to the abstract* released by the U.S. Patent & Trademark Office: "Optical add-drop multiplexers (OADMs) connect two or more network terminals in an optical network to perform wavelength division multiplexing. If a channel in an optical connection between an OADM and a terminal is interrupted for any reason such that the signal in the channel drops, transient effects such as spectral hole burning may occur which impacts neighbori...