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. 28, 2005
Filed:
Oct. 22, 2002
Hideyuki Sotobayashi, Tokyo, JP;
Wataru Chujo, Tokyo, JP;
Hideyuki Sotobayashi, Tokyo, JP;
Wataru Chujo, Tokyo, JP;
Abstract
An optical signal noise reduction device and method, where optical control signals are input into a first ring optical fiber, so that optical signals propagates clockwise and counter-clockwise in the optical fiber, with optical control signals propagating either clockwise or counter-clockwise in the first ring optical fiber. Optica signals propagating in the same direction as the optical control signals are affected with cross phase modulation with the optical control signals, while optical signals propagating in the opposite direction as the optical control signals are not affected with cross phase modulation with the optical control signals. The two kinds of the optical signals are then interfered with each other at the optical output to reduce noise of the optical.