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:
Jul. 20, 1999
Filed:
Mar. 11, 1997
Tsutomu Tajima, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical fiber amp repeater, provided on an optical transmission channel in an optical system, having an excitation light output section for supplying an excitation light for amplifying a received optical signal, and a main signal light amplifier section for supplying the optical signal which is amplified while going through the rare earth dope fiber after combining the received optical signal with the excitation light supplied from the excitation light output section, the excitation light output section including an excitation light source for transmitting the excitation light and an excitation light source driving circuit for driving the excitation light source, the excitation light source driving circuit controlling the excitation light source according to a given data and modulating the excitation light by high frequency wave, thereby to create an auxiliary signal containing the given data.