H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/04 (2006.01) H04B 10/145 (2006.01) H04B 10/148 (2006.01) H04B 10/155 (2006.01) H04B 10/158 (2006.01) H04L 27/20 (2006.01) H04L 27/22 (2006.01)
Patent
CA 2047022
A direct modulation phase shift keying transmission system (DM-PSK transmission system) is disclosed for coherent optical fiber transmission in which an injection current supplied to a semiconductor laser is adapted to be directly modulated. This system presents useful features in automatic frequency control, demodulation, and phase noise suppression.
Chikama Terumi
Kuwahara Hideo
Naito Takao
Watanabe Shigeki
Fetherstonhaugh & Co.
Fujitsu Limited
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