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:
Mar. 14, 2006
Filed:
Jul. 15, 2005
Teruya Sugiyama, Shizuoka, JP;
Mitsuteru Inoue, Okazaki, JP;
Dong-hak Shin, Toyohashi, JP;
Hitoshi Masuda, Yamato, JP;
Teruya Sugiyama, Shizuoka, JP;
Mitsuteru Inoue, Okazaki, JP;
Dong-Hak Shin, Toyohashi, JP;
Hitoshi Masuda, Yamato, JP;
Pegasusnet Co., Ltd., Shizuoka-ken, JP;
T. S. Photon Co., Ltd., Shizuoka-ken, JP;
Abstract
An optic switch for cross-connecting input light signals incoming from inlet fiber cables to outlet fiber cables is disclosed that makes use of a holographic filter () having a series of preformed different speckle patterns, each in the form of a hologram (H, H, . . . ). Associated with input light signals guided past respective inlet passages (in) of a multimode waveguide (), different speckle patterns are formed by applying different control voltages across respective electrode pairs () provided thereon. These speckle patterns past a single outlet passage (out) of the multimode waveguide () into which the inlet passages (in) converge are joined together and enter the holographic filter () in which an input light signal is selectively switched, addressed and cross-connected to an outlet waveguide () through a region thereof where a formed speckle pattern coincides with a preformed speckle pattern. The multi mode waveguides () is formed in, e.g., a LiNbOphotorefractive substrate ().