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:
Jun. 27, 2023
Filed:
Mar. 08, 2022
Nec Corporation, Tokyo, JP;
Yusuke Yamauchi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An optical reception apparatus () of the present invention includes: a local oscillator () outputting local oscillation light (); an optical mixer () receiving a multiplexed optical signal () and the local oscillation light, and selectively outputting an optical signal () corresponding to the wavelength of the local oscillation light from the multiplexed optical signal; a photoelectric converter () converting the optical signal () output from the optical mixer into an electric signal (); a variable gain amplifier () amplifying the electric signal () to generate an output signal () whose output amplitude is amplified to a certain level; a gain control signal generating circuit () generating a gain control signal () for controlling the gain of the variable gain amplifier (); and a monitor signal generating unit () generating a monitor signal () corresponding to the power of the optical signal () using the gain control signal ().