US Patent Issued to NEC on Oct. 21 for "Communication control techniques in quantum cryptographic communication system" (Japanese Inventor)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,452,045, issued on Oct. 21, was assigned to NEC Corp. (Tokyo).

"Communication control techniques in quantum cryptographic communication system" was invented by Hiroshi Imai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A communication device can achieve SN ratio and stability of signal output an optical transmission line having the propagation characteristics susceptible to environmental changes. The communication device includes: an optical reception section configured to receive weak signal light and reference light arriving through the optical transmission line; an optical amplifier that amplifies received reference light; a probe light recei...