Phase modulation for an optical transmission syste
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专利名称：Phase modulation for an optical
transmission system
发明人：Martensson, Jonas, c/o Qvistgaard,Berntson,
Anders,Forzati, Marco
申请号：EP02008492.7
申请日：20020415
公开号：EP1355435A1
公开日：
20031022
专利内容由知识产权出版社提供
专利附图：
摘要：A data modulation apparatus is proposed that includes a data modulator (20)for modulating data onto an optical signal at a predetermined bit rate. The resulting
encoded optical signal is phase modulated by a phase modulator (50) that is driven by at least one waveform of a frequency that is 1/n of the predetermined bit rate, where n is an integer greater than 2. The application of a phase modulation at a frequency of a third or less of the bit rate of a digital data signal increases the non-linear tolerance of a transmission system by reducing the effect of non-linear pulse-to-pulse interactions. Moreover, this increase in non-linear tolerance is significantly better than that obtained by a phase modulation at one half of the data bit rate, while the implementation of a phase modulator at this lower frequency reduces the complexity of the transmitter.
申请人：TELEFONAKTIEBOLAGET LM ERICSSON
地址：126 25 Stockholm SE
国籍：SE
代理机构：Gray, Helen Mary
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