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:
Jun. 07, 2005
Filed:
Mar. 13, 2002
Izumi Iwasa, Nakai-machi, JP;
Makoto Furuki, Nakai-machi, JP;
Yasuhiro Sato, Nakai-machi, JP;
Minquan Tian, Nakai-machi, JP;
Lyong Sun Pu, Nakai-machi, JP;
Satoshi Tatsuura, Nakai-machi, JP;
Izumi Iwasa, Nakai-machi, JP;
Makoto Furuki, Nakai-machi, JP;
Yasuhiro Sato, Nakai-machi, JP;
Minquan Tian, Nakai-machi, JP;
Lyong Sun Pu, Nakai-machi, JP;
Satoshi Tatsuura, Nakai-machi, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An optical pulse code recognition device and an optical distributor recognize multiple bits of a 1 Tbps packet signal as they are, all at one time. A serial signal light emitted from an optical fiber is collimated by a lens and applied onto a mask having a mask pattern. A thin film optical switch increases its optical transmittance when irradiated with a control light, allowing the collimated signal light to transmit through it. When the control light is applied, the transmitted collimated signal light is converted into a parallel signal. The mask pattern has multiple transmission portions allowing one bit of signal light to transmit through and an equal number of non-transmitting portions to block the light, and whether or not a bit pattern of the signal light and the mask pattern match each other is found by detecting a maximum or minimum value of light intensity with a photodetector.