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:
Dec. 07, 2004
Filed:
Nov. 12, 2002
Applicant:
Inventor:
Hitoshi Hatayama, Yokohama, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/28 ; G02B 6/10 ; G02F 1/295 ; H04B 1/012 ;
U.S. Cl.
CPC ...
G02B 6/28 ; G02B 6/10 ; G02F 1/295 ; H04B 1/012 ;
Abstract
Provided herein are a planar optical circuit and optical transmission system in which signal light power can be adjusted with respect to signal light and light that is different from the wavelength band of the signal light can be maintained satisfactorily. The planar optical circuit is composed of a filter that can cause loss of variable wavelength dependence to signal light of a signal light wavelength band such that signal light input from a signal light input end is caused to have loss at given wavelength dependent loss by filter and is output from signal light output end