Goedde C G, Kath W L, Kumar P
Opt Lett. 1995 Jun 15;20(12):1365-7. doi: 10.1364/ol.20.001365.
Nondegenerate optical parametric amplifiers can be used to simultaneously phase conjugate and amplify a pulse in a nonlinear optical fiber. The gain in the amplifiers compensates the linear loss in the fiber, while the phase conjugation effectively neutralizes second-order dispersion, self-phase modulation, the Raman self-frequency shift, and Gordon-Haus jitter. If the remaining third-order and nonlinear dispersions balance, solitonlike pulses are able to propagate with subpicosecond pulse widths.
非简并光学参量放大器可用于在非线性光纤中同时进行相位共轭和放大脉冲。放大器中的增益补偿了光纤中的线性损耗，而相位共轭有效地抵消了二阶色散、自相位调制、拉曼自频移和戈登-豪斯抖动。如果剩余的三阶和非线性色散相互平衡，类孤子脉冲就能以亚皮秒脉冲宽度进行传输。
