US Patent Issued to CISCO TECHNOLOGY on April 29 for "Two layer polarization splitter rotator" (California Inventor)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,287,512, issued on April 29, was assigned to CISCO TECHNOLOGY INC. (San Jose, Calif.).

"Two layer polarization splitter rotator" was invented by Jonathan Edgar Roth (San Mateo, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A polarization splitter rotator includes a first lower waveguide and a second lower waveguide disposed on a first layer, the first lower waveguide and the second lower waveguide, in a first portion of the device, widening symmetrically as the first lower waveguide and the second lower waveguide extend from an input end of the device to an output end of the device, and, in a second portion of the device, at least the second lowe...