The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2024
Filed:
Nov. 19, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A second transceiver () includes a guide light source (), a photorefractive crystal (), and a frequency control unit (). The guide light source () emits guide light (Y). A double phase conjugate mirror () is formed in a crystal () by scattering of reference signal light (Y), which has a frequency different from that of the guide light and is incident on the crystal via space () after being transmitted from a first transceiver () which is a transceiver on the other side, and the guide light that is incident on the crystal in a reverse direction to that of the reference signal light. A frequency control unit () couples the reference signal light emitted from the crystal (), which is phase-conjugate light of the guide light generated by the mirror (), to an optical fiber ().