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:
Jun. 01, 2004
Filed:
May. 02, 2001
Takehiro Tsuritani, Kamifukuoka, JP;
Yuichi Yamada, Kamifukuoka, JP;
Noboru Edagawa, Kamifukuoka, JP;
Masatoshi Suzuki, Kamifukuoka, JP;
Other;
Abstract
An object of this invention is to improve transmission characteristics in WDM transmission. An optical transmitter ( ) wavelength-multiplexes signal lights of wavelengths &lgr; through &lgr;n and outputs them onto an optical transmission line ( ). Optical powers of the signal lights of the respective wavelength through &lgr;n are identical or become smaller proportional to the wavelength. One repeater span of the optical transmission line ( ) is composed of an optical fibers ( ) and an optical amplifier ( ), and a gain equalizer ( ) is dispersed every several repeater spans. The optical amplifier ( ) in the repeater span amplifies each signal light so that optical power of a signal on the shorter wavelength side becomes smaller than that of a signal on the longer wavelength side. The gain equalizer ( ) equalizes optical powers of the respective signal lights.