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中文摘要：
首次从理论上推导利用光纤环形腔实现信号复制时输入信号消光比对环形腔输出信号消光比影响的定量关系,并在实验上观察到光信号中连续光基座引起复制信号消光比恶化的现象。实验测得了输入信号消光比对输出信号恶化程度的定量关系,与理论结果相符。通过减小连续光基座,实现了光纤环形腔对光信号的多次复制。利用掺铒光纤放大器（EDFA）对环形腔进行功率补偿,及半导体光放大器（SOA）对输出信号进行功率均衡,实现了半功率复制10次以上。
英文摘要：
The influence of the extinction ratio（EXR） of the input signal on the copying optical signal are analyzed theoretizally and we notice that the deterioration of the EXR of the output signal result from continuous-wave（CW）.The relationship between the EXR of the output and the input signals are given quantificationally.The recopied optical signal using fiber ring cavity is realized in experiment by reducing CW.An Erbium-doped optical fiber amplifier（EDFA） is employed to compensate the round-trip loss of the fiber ring cavity,and a semiconductor optical amplifier（SOA） is used for the power equalizing of the output signal,the tenth copied optical signal is implemented.
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