非线性光纤信道容量预测

为了计算非线性光纤传输对其信道容量的作用，从信号功率传输特性出发，提出了一种计算非线性光纤信道容量的数值解法，分别得到了非线性信道容量与输入脉冲峰值功率、自发辐射噪音系数、光纤非线性参量及群速色散之间的关系曲线并得出结论：单纯的提高脉冲输入功率并不能提高非线性信道容量，尤其对大功率系统．

Nonlinear Optical Fiber Channel Capacity Estimation

For studying the accurate impacts of nonlinear fiber propagation on channel capacity conveniently, a numerical calculating method derived from signal power transmission property is presented, its dependences on input pulses peak power is obtained, and spontaneous emission noise intensity, nonlinear coefficients and group velocity dispersion of fiber are amplified. It can also conclude that the improvement of nonlinear channel capacity will not go with the improvement of input signal power especially for larger power input case, which can be used as a guideline to calculate nonlinear channel capacity theoretically and improve nonlinear channel capacity in technical application.