ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,981, issued on Oct. 14, was assigned to Cisco Technology Inc. (San Jose, Calif.).
"Double-layered antisymmetric two mode Bragg gratings" was invented by Tao Ling (Breinigsville, Pa.), Ravi S. Tummidi (Breinigsville, Pa.) and Shiyi Chen (Breinigsville, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments herein describe a dual-layer Bragg grating that can be used as a dual-bandpass filter. In one embodiment, the dual-layer Bragg grating comprises at least two layers, each having an anti-symmetrical structure. In addition, the anti-symmetrical structures can have different pitches which are tuned to different bands. That is, the pitch of the...