发明名称 |
DPSK modulation-demodulation method, and optical communication device and optical communication system using the same |
摘要 |
In the optical communication device and the optical communication system using DPSK modulation whose cost is low, whose size is small and whose power consumption is low, the N:1 multiplexer 125 generates a serial signal by multiplexing a parallel signal coded by the DPSK modulation coding units 115~117 bit by bit on a time division basis. The electric-phase modulation optical converter 127 converts a serial signal into a phase modulation light. The N-bit delay interferometer 132 executes DPSK decoding with respect to a phase modulation light by comparison with an N-bit preceding optical signal. The optical-electric signal converter 134 converts a decoded intensity modulation light into an electric signal. The N:1 demultiplexer 136 divides an electric signal converted by the optical-electric signal converter 134 into a number N of signals bit by bit on a time division basis. |
申请公布号 |
US8639114(B2) |
申请公布日期 |
2014.01.28 |
申请号 |
US20060916612 |
申请日期 |
2006.06.28 |
申请人 |
SHIOIRI SATOMI;ITOU TOSHIHARU;FUKUCHI KIYOSHI;TAKESHITA HITOSHI;NEC CORPORATION |
发明人 |
SHIOIRI SATOMI;ITOU TOSHIHARU;FUKUCHI KIYOSHI;TAKESHITA HITOSHI |
分类号 |
H04J14/02;H04J14/08 |
主分类号 |
H04J14/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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