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:
Apr. 08, 2003
Filed:
Jul. 25, 2001
Daeyoul Yoon, Tokyo, JP;
Hiroshi Matsuura, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
An optical multiplexing/demultiplexing module for inputting a first linearly polarized beam after exiting a first optical waveguide, and the first beam is collimated by a first lens. A second linearly polarized beam exits a second optical waveguide and is collimated by a second lens. Both beams enter an entrance surface of a uniaxial birefringent crystal. The second beam enters the crystal along an optical path which is changed by a prism. This reduces the distance between the respective points of entrance of the beams. The beams which have entered the crystal are multiplexed at an exit surface of the crystal. A resultant multiplexed beam is converged by a third lens to enter and exit a third optical waveguide.