US Patent Issued to NTT on Aug. 4 for "Control circuit and optical circuit control method" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,299, issued on Aug. 4, was assigned to NTT Inc. (Tokyo).

"Control circuit and optical circuit control method" was invented by Hiroto Kawakami (Musashino, Japan), Yoshiaki Kisaka (Musashino, Japan) and Shoichiro Kuwahara (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A control circuit controls at least one optical path difference among optical path differences of two optical paths included in a single MZI or each of a plurality of the MZIs included in an optical circuit. The control circuit includes a reference light generation unit, a reference light input unit, an optical power monitor unit, and a controller. The reference light ge...