摘要
对AM VSB光纤 75 0MHzCATV系统的非线性补偿技术以及DFB激光器的APC和ATC电路进行了讨论和设计。给出了研制的DFB光发射机及接收机的特性及实测结果。对光发射机的关键技术即预失真校正技术进行了论述 ,给出了研制的预失真电路的实测结果。在 6 0路PAL制信号同时传输条件下 ,CSO改善 2～ 4dB ,CTB改善 5～ 7dBc。
Study is devoted to nonlinearity and its compensation in AM VSB fibre CATV transmission system with transmission bandwidth of 750 MHz.Automatic optical power control circuit and automatic temperature control circuit in transmitter are discussed and designed.The results of measurements of optical transmitter and optical receiver developed by us are presented.The key technology in transmitter,the predistortion technology,is discussed.The results of measurements of predistortion circuit developed by us are given.The improvement of CSO is 2～4 dB and that of CTB is 5～7 dB in 60 channels.
出处
《南京邮电学院学报》
2000年第2期83-85,90,共4页
Journal of Nanjing University of Posts and Telecommunications(Natural Science)
关键词
AM-VSB光纤
有线电视
传输系统
Correcting distortion by predistortion
Automatic optical power control
Automatic temperature control
Multiquantum well distributed feedback laser
