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:
Aug. 12, 1997
Filed:
Apr. 12, 1996
Kenichi Yoneyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A monitoring system for all optical regenerators comprises at least one all optical regenerator including an optical signal amplifier for directly amplifying and outputting main optical signals, which are inputted, and optical terminal equipments, connected to the all optical regenerator or regenerators, for delivering and supplying the main optical signals. Each all optical regenerator is provided with a monitor information delivering section for superposing monitor information, representing the internal information of the regenerator, over the main optical signals and delivering monitor optical signals. Each optical terminal equipment comprises a monitor information extractor section for receiving the monitor optical signals and extracting the monitor information from them and a monitor section for monitoring the regenerator according to the monitor information. Each all optical regenerator may also be provided with a regenerator section for regenerating the main optical signals. Each all optical regenerator may further be provided with a reshaping section for reshaping the waveform of the main optical signals or a retiming section for retiming the main optical signals. The monitor information from the monitor information delivering section is superposed over the main optical signals by phase modulation. Each main optical signal contains a clock optical signal for giving a clock to this main optical signal, and a monitor information superposing section superposes the monitor information over the clock optical signals. The present invention provides a monitoring system which is cleared of the disadvantages of conventional monitoring systems and applicable to all optical regenerators as well.