US Patent 7609982 RZ-DPSK optical receiver circuit
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Patent Inventor Names
Tadashi Ikeuchi0
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Patent abstract
A received RZ-DPSK signal is guided to an interferometer. The interferometer comprises a 1-bit delaying element in an upper arm. A balanced photodiode converts a pair of optical signals output from the interferometer into electrical signal. A high-pass filter, which has a cut-off frequency equal or approximately equal to the symbol rate of transmission data, filters the signal output from the balanced photodiode. A BPSK demodulator circuit demodulates the output signal of the high-pass filter.
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US Patent 07609982 RZ-DPSK optical receiver circuit US Patent 7609982 RZ-DPSK optical receiver circuit
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Patent Number
076099820
Patent Number
76099820
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Patent Jurisdiction
Patent Number
076099820
Date of Patent
October 27, 2009
0Patent Application Number
112706550
Date Filed
November 10, 2005
0Official Website
Patent Primary Examiner
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US Patent 07609982 RZ-DPSK optical receiver circuit
Infobox
Is a
Patent jurisdiction
Patent number
07609982
Date of patent
October 27, 2009
Patent application number
11270655
Date Filed
November 10, 2005
Patent primary examiner
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