Guan J, Zhu C J, Hang C, Yang Y P
Opt Express. 2020 Oct 12;28(21):31287-31296. doi: 10.1364/OE.398424.
We study the generation and propagation of hyperbolic secant solitons, Peregrine solitons, and various breathers in a coherently prepared three-level atomic system, where two lower states are coherently prepared prior to the injection of a strong pump field and a weak probe field. We show that a flat dispersion without gain and loss along with a large Kerr nonlinearity can be achieved in a broad range of probe field frequency. Moreover, optical hyperbolic secant solitons can be easily achieved in such a broad range at a very low light intensity and propagate stably. Due to the enhanced Kerr nonlinearity, we also show that it is possible to generate optical rogue waves and breathers with very weak light stimulus, which is three orders of magnitude smaller than that used in nonlinear fibers. Because the gain/absorption is negligible and the quantum noise of the probe field can be significantly suppressed, our work may pave the way for realizing solitons, rogue waves, and breathers at the quantum level.
我们研究了在一个相干制备的三能级原子系统中双曲正割孤子、佩雷格林孤子以及各种呼吸子的产生和传播，其中在注入强泵浦场和弱探测场之前，先对两个较低能级进行了相干制备。我们表明，在很宽的探测场频率范围内，可以实现无增益和损耗的平坦色散以及大的克尔非线性。此外，在如此宽的频率范围内，以非常低的光强就能轻松实现光学双曲正割孤子，并且它们能稳定传播。由于克尔非线性增强，我们还表明，用非常弱的光刺激就有可能产生光学 rogue 波和呼吸子，这比非线性光纤中所使用的光刺激强度小三个数量级。因为增益/吸收可忽略不计，并且探测场的量子噪声能被显著抑制，我们的工作可能为在量子水平上实现孤子、rogue 波和呼吸子铺平道路。
