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:
Feb. 14, 1995
Filed:
Mar. 03, 1994
Fumihiko Ito, Kanagawa, JP;
Kenichi Kitayama, Kanagawa, JP;
Nippon Telegraph and Telephone Corp., Tokyo, JP;
Abstract
An optical receiver for receiving tile optical signals with high speed modulation at a high sensitivity. In this optical receiver, a local beam synchronized with a carrier of the optical signal is generated, and multi-frequency local beam components obtained from the local beam are spatially resolved to obtain spatially resolved beams with mutually different frequencies. Then, the optical signal and the obtained spatially resolved beams are entered into the photo-detector element array simultaneously to obtain an interference fringe pattern. The received optical signal is then reconstructed by Fourier analyzing the interference fringe pattern obtained by the photo-detector element array.