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. 14, 2005
Filed:
Oct. 18, 2002
Shin-ichirou Harasawa, Kawasaki, JP;
Shin-ichirou Harasawa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In the method according to the present invention, an optical fiber transmission line for transmitting signal light is first provided. A Raman repeaterhaving a pumping source for supplying pump light propagating in a direction opposite to the direction of propagation of the signal light to the optical fiber transmission line is provided in the middle of the optical fiber transmission line. A terminal device having a similar pumping source is provided at one end of the optical fiber transmission line. A control signal is transmitted to the Raman repeaterby the pump light from the terminal device. The Raman repeater is controlled by the control signal transmitted. According to this method, the Raman repeater is controlled by the pump light from the terminal device provided at the receiving end, thereby eliminating a problem arising in the case of control by signal light as in the prior art.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile