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:
Apr. 11, 2023
Filed:
Mar. 18, 2020
Nec Corporation, Tokyo, JP;
Yasushi Hara, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to stabilize the characteristics of reception of an optical signal received via a transfer path, this optical receiver is provided with: a local beam output means; a light receiving means; a photoelectric conversion means; a measuring means; a control means; and a comparing means, the comparing means, when the control meanssweeping the wavelength of the local beam in a predetermined wavelength range with respect to the central wavelength of the optical signal, generating difference data between a spectrum based on a result of the measuring, by the measuring means, of the electric signal in accordance with a change in the wavelength of the local beam and a preset reference spectrum.