【摘要】 导出了单一串扰情况下 ,串扰光和系统光噪声共同存在时 ,接收机输入光信号及其基带输出信号的表达式。阐述了信号光与串扰光的物理相干性与信号数字逻辑相关性问题。计算了在最优判决门限情况下 ,背景误码率在10 - 9条件时 ,信号光消光比与串扰光消光比对系统误码率的影响。结果表明 ,消光比在 8～ 12dB的范围内 ,系统的误码特性接近最优。更多还原

【Abstract】 In this paper, the expression formula for the total input electrical field of optical receiver in DWDM systems in the case of existence of optical noise and crosstalk, is deduced. The problem of physical coherence and digital logical correlation is stated in detail. The effect of optical extinction ratio for both signal and crosstalk on the system BER performance is calculated, as the background BER for the case of 10 -9 due to optical noise only and optimal decision level are assumed. It is found that the extinction ratio is about 8～12 dB, while the system BER performance is optimal.更多还原