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:
May. 16, 2000
Filed:
Apr. 21, 1997
Tetsuo Wada, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
An optical transmission system having a linear repeater section that performs linear amplification of an optical signal, in which some functional redundancy is introduced to improve the reliability of long-distance signal transmission. The optical transmission line is segmented by regenerative repeater devices into a plurality of linear repeater sections, in each of which a plurality of linear optical amplifiers are deployed. The regenerative repeater devices have a signal regeneration unit that regenerates the received optical signals to compensate for their deterioration. The present invention eliminates RSOH termination and insertion functions from the regenerative repeater devices connected to at least one end of each linear repeater section. Further, the present invention deploys a signal regeneration unit in parallel with a linear optical amplifier within each linear repeater section. Still further, the present invention adds another signal regeneration unit to the existing signal regeneration unit as part of each regenerative repeater device connected to at least one end of each linear repeater section.