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:
Nov. 07, 2006
Filed:
Aug. 09, 2001
Yusuke Yajima, Chiyoda-ku, Tokyo 100-8220, JP;
Takashi Mori, Chiyoda-ku, Tokyo 100-8220, JP;
Masatoshi Shibasaki, Chiyoda-ku, Tokyo 100-8220, JP;
Yusuke Yajima, Chiyoda-ku, Tokyo 100-8220, JP;
Takashi Mori, Chiyoda-ku, Tokyo 100-8220, JP;
Masatoshi Shibasaki, Chiyoda-ku, Tokyo 100-8220, JP;
Other;
Abstract
In a known wavelength multiplexer, optical signals to pass are passed with their wavelengths held identical. Therefore, unless an unused wavelength common to all zones exists in case of setting an optical channel, the channel cannot be set. According to the present invention, a drop/add type wavelength multiplexer includes a wavelength converting section (in FIG.) which converts the wavelengths of optical signals to pass from the input side of the multiplexer to the output side thereof. In a network employing the wavelength multiplexers at individual nodes, a new optical channel can be easily set by utilizing wavelengths not used at the nodes.