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:
Apr. 18, 2006
Filed:
Jul. 12, 2001
Shigeru Tokita, Yokohama, JP;
Mitsuo Akashi, Yokohama, JP;
Naohiko Baba, Yokohama, JP;
Yoichi Honzawa, Yokohama, JP;
Hideki Satoh, Yokohama, JP;
Shigeru Tokita, Yokohama, JP;
Mitsuo Akashi, Yokohama, JP;
Naohiko Baba, Yokohama, JP;
Yoichi Honzawa, Yokohama, JP;
Hideki Satoh, Yokohama, JP;
OpNext Japan, Inc., Yokohama, JP;
Abstract
An optical transmission system includes a current source for outputting a drive current, a semiconductor laser for converting the drive current into a stimulated emission light and producing the same, a drive circuit for converting a transmission data signal into a modulation control signal and outputting the same, an optical modulator for receiving the stimulated emission light and a shading control signal for interrupting light emission and producing and outputting transmission signal light by changing an amount of transmission of the stimulated emission light according to the shading control signal, and a shading element for receiving the transmission signal light and a shading control signal for interrupting light emission and interrupting the transmission of the transmission signal light according to the shading control signal whereby an optical signal having wrong optical wavelength is rapidly prevented.