US Patent Issued to NTT on June 30 for "Optical signal transmitter" (Japanese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,671,229, issued on June 30, was assigned to NTT Inc. (Tokyo).

"Optical signal transmitter" was invented by Meishin Chin (Musashino, Japan), Takahiko Shindo (Musashino, Japan) and Shigeru Kanazawa (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical signal transmitter (AXEL) in which a quality of an optical signal waveform is maintained includes a distributed Bragg reflector to be coupled with an emission end surface of an SOA in an optical circuit unit including an optical waveguide core portion formed on an upper surface of a substrate. In the optical circuit unit, a diffraction grating formed on an upper surface side opposite to...