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本文分析了 1 .55μm信号波长 ,采用强度调制 /直接检测 ( IM/DD)方式的单信道级联相敏光放大器 ( PSA)非零色散位移光纤传输系统的性能 .应用非线性薛定谔方程 ( NL SE) ,通过对信号传输后眼图劣化度的计算 ,得到了光纤传输系统的码间干扰 ( ISI)限制距离 .由于PSA的相敏特性 ,其对光纤色散具有一定的补偿作用 ,因此级联相敏光放大器光纤通信系统可以实现信号高比特率长距离传输 .然而 ,随着信号速率的提高 ,对长距离传输 ,必须减小光纤色散值和 PSA的间距 .当光纤色散值大到一定程度 ,要进行信号的高速率传输 ,就必须附加其它的色散补偿方法 .
This paper analyzes the performance of a single-channel cascaded phase-sensitive amplifier (PSA) non-zero dispersion shifted optical fiber transmission system with the signal wavelength of 1.55μm and the intensity modulation / direct detection (IM / DD) method.Using the nonlinear Schrödinger equation ), The intersymbol interference (ISI) limit of the optical fiber transmission system is obtained by calculating the eye-diagram degradation degree after signal transmission.As the phase-sensitive property of PSA, it has a certain compensation effect on the optical fiber dispersion, so the cascaded phase However, with the increase of signal rate, it is necessary to reduce the dispersion value of the fiber and the pitch of the PSA for long-distance transmission when the optical fiber dispersion value is large to a certain extent, For high-speed signal transmission, you must attach additional dispersion compensation method.