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:
Jul. 02, 2002
Filed:
Apr. 05, 2000
Tsunetoshi Saito, Tokyo, JP;
Toshihiko Ota, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The invention provides a small-sized optical wavelength multiplexed transmission module with suppressed noise, without increasing the size of the chip, wherein an optical filter ( ) which interrupts light of a specified wavelength area other than the wavelength used for wavelength multiplexed transmissions is connected to an optical input waveguide side ( ) of an arrayed waveguide type optical wavelength synthesizing and dividing device ( ). Since the optical filter ( ) can interrupt noise wavelength components, light passed through and divided by the arrayed waveguide optical wavelength synthesizing and dividing device ( ) can become signal light of the use wavelength free from noise.