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:
Nov. 23, 2004
Filed:
Mar. 13, 2003
Michiko Takushima, Yokohama, JP;
Tomomi Sano, Yokohama, JP;
Hiroshi Suganuma, Yokohama, JP;
Tatsuhiko Tanaka, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
This invention provides an optical signal processing apparatus capable of size reduction. When signal light with multiple wavelengths &lgr; to &lgr; is collimated by and output from a fiber collimator, the signal light components with multiple wavelengths &lgr; to &lgr; are diffracted by a diffraction grating at diffraction angles corresponding to the wavelengths and separated for the respective wavelengths. The separated signal light components of the respective wavelengths are output to spatially different optical paths. The signal light components having the wavelengths &lgr; are deflected at their optical paths by prisms to increase the optical path interval and then input to fiber collimators.