US Patent Issued to Nippon Telegraph and Telephone on July 1 for "Planar optical waveguide device for measuring amplitude phase of squeezed light" (Japanese Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,346,000, issued on July 1, was assigned to Nippon Telegraph and Telephone Corp. (Tokyo).

"Planar optical waveguide device for measuring amplitude phase of squeezed light" was invented by Asuka Inoue (Musashino, Japan), Ryoichi Kasahara (Musashino, Japan), Takeshi Umeki (Musashino, Japan), Osamu Tadanaga (Musashino, Japan), Koji Embutsu (Musashino, Japan), Nobutatsu Koshobu (Musashino, Japan), Takushi Kazama (Musashino, Japan) and Takahiro Kashiwazaki (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A planar optical waveguide device which has improved resistance to optical loss and improved stability of the entire system of balanced homody...