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:
Sep. 14, 2021
Filed:
Aug. 04, 2020
Fujitsu Limited, Kawasaki, JP;
Youichi Akasaka, Plano, TX (US);
Tadashi Ikeuchi, Plano, TX (US);
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical system including a transmission fiber to transmit a WDM input optical signal between first and second points; a second order forward Raman pump module positioned along a first region of the transmission fiber proximate to the first point; a first order backward Raman pump module positioned along a second region of the transmission fiber proximate to the second point, the first order backward Raman pump module is configured to generate a first pumping light along the transmission fiber to amplify the WDM input optical signal at the second region of the transmission fiber, wherein the second order forward Raman pump module is configured to generate a second pumping light along the transmission fiber to amplify the first pumping light generated by the first order backward Raman pump module, wherein the amplified first pumping light amplifies the WDM input optical signal at the first region of the transmission fiber.