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. 16, 1999
Filed:
Nov. 15, 1997
Shuntaro Yamazaki, Tokyo, JP;
Takeshi Nagahori, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A fiber-optic access system for subscriber optical communication adopting star type topology in an optical fiber network includes a central office, a plurality of optical network units, an optical interface, and a signal recognition/reproduction and clock extraction IC. The optical interface is provided in the central office and includes an array optical transmission module as a package unit accommodating a plurality of light sources and a plurality of output fiber terminals, and an array optical reception module as a package unit accommodating a plurality of optical sensors and a plurality of input fiber terminals. The signal recognition/reproduction and clock extraction IC is provided to each channel of the array optical reception module. The access system provided is of a scale comparable to that of a central office side optical interface of PDS and wide band characteristics comparable to those of a single star type system.