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:
Oct. 06, 2009
Filed:
Aug. 29, 2008
Toshiki Nishizawa, Yokohama, JP;
Kenji Kobayashi, Yokohama, JP;
Yuji Mitsuhashi, Yokohama, JP;
Hiroshi Tomita, Yokohama, JP;
Toshiki Nishizawa, Yokohama, JP;
Kenji Kobayashi, Yokohama, JP;
Yuji Mitsuhashi, Yokohama, JP;
Hiroshi Tomita, Yokohama, JP;
NTT Electronics Corporation, Kanagawa, JP;
Abstract
In a wavelength selective switch according to the present invention, an isolator is disposed between a lens array and a first lens. The isolator includes an isolator element and a transmitting means. The isolator is disposed so that the isolator element is on light paths of input lights and that the transmitting element is on a light path of an output light. The isolator element is shared among the light paths of the plurality of input lights. The isolator element intercepts lights propagating in an opposite direction to the input lights and prevents coupling of the lights to input ports. The transmitting element transmits the output light and couples it to an output port.