Locati F S, Romagnoli M, Tajani A, Wabnitz S
Opt Lett. 1992 Sep 1;17(17):1213-5. doi: 10.1364/ol.17.001213.
The optimal all-optical switching, amplification, and temporal compression of femtosecond solitons by means of a nonlinear erbium-doped twin-core fiber may be achieved by suitably tapering the linear coupling strength. We analytically show that, irrespective of the soliton self-frequency shift, tapering may in principle reduce the switching power threshold to arbitrarily low values. A substantial reduction is also demonstrated in a practical case in which the full complex susceptibility of the erbium doping and the Raman response function are considered.
通过对非线性掺铒双芯光纤的线性耦合强度进行适当的锥形调整，可以实现飞秒孤子的最优全光开关、放大和时间压缩。我们通过分析表明，无论孤子自频移如何，锥形调整原则上都可以将开关功率阈值降低到任意低值。在考虑掺铒的完整复磁化率和拉曼响应函数的实际情况下，也证明了显著的降低。
