Coded data generation or conversion – Digital code to digital code converters – Serial to parallel
Reexamination Certificate
2005-08-16
2005-08-16
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Serial to parallel
C341S101000, C341S137000
Reexamination Certificate
active
06930623
ABSTRACT:
The present invention aims at achieving an optical signal processing system which converts a higher speed optical signal to electrical signals by time-demultiplexing the signal with low-speed electrical signals.The present invention offers an improved optical signal processing system that converts a serial pulse train optical signal with transmission speed N to parallel pulse train electrical signals. This system is characterized by providing a serial-parallel converter in which at least two optical switches are cascaded, each of which outputs optical signals with transmission speed M (N>M) to one of the two output terminals and outputs the remaining optical signals to the alternative one of said two output terminals by switching connection to said output terminal, receiving parts which convert optical signals from one of the two output terminals of each of the above optical switches to electrical signals, a synchronizing circuit which outputs timing signals in synchronization with electrical signals output from these receiving parts, and drivers which cause the above described optical switches to switch their connections based on timing signals output from the above synchronizing circuit.
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“Ultra High-speed Optical Switching Technology” co-edited by Takeshi Kamiya and Yasuhiko Arakawa, the first edition, Baifukan Co., Ltd., Jul. 1993.
Asano Yoshiyuki
Iio Shinji
Kobayashi Shinji
Kodaka Hirotoshi
Matsuura Hiroyuki
Jean-Pierre Peguy
Westerman Hattori Daniels & Adrian LLP
Yokogawa Electric Corporation
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