US Patent Issued to Nippon Telegraph and Telephone on May 20 for "Photonic integrated optical device with an optical functional element and planar lightwave circuit" (Japanese Inventor)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,440, issued on May 20, was assigned to Nippon Telegraph and Telephone Corp. (Tokyo).

"Photonic integrated optical device with an optical functional element and planar lightwave circuit" was invented by Yu Kurata (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A photonic integrated optical device can implement hybrid integration of an optical functional element simply and easily using an optical circuit of a PLC as a platform and allows high accuracy butt-joining of optical waveguides. For that, on the side of an optical circuit on top of a substrate of the PLC, the device uses a butt-joint holding substrate that transmits light in t...