Turitsyn S K, Bednyakova A E, Podivilov E V
Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom.
Novosibirsk State University, Novosibirsk 630090, Russia.
Phys Rev Lett. 2023 Oct 13;131(15):153802. doi: 10.1103/PhysRevLett.131.153802.
A generic novel model governing optical pulse propagation in a nonlinear dispersive amplifying medium with asymmetric (linear spectral slope) gain is introduced. We examine the properties of asymmetric optical pulses formed in such gain-skewed media, both theoretically and numerically. We derive a dissipative optical modification of the classical shallow water equations that highlights an analogy between this phenomenon and hydrodynamic wave breaking. These findings provide insight into the nature of asymmetric optical pulses capable of accumulating large nonlinear phase without wave breaking, a crucial aspect in the design of nonlinear fiber amplifiers.
引入了一种通用的新型模型，用于描述光脉冲在具有非对称（线性光谱斜率）增益的非线性色散放大介质中的传播。我们从理论和数值两方面研究了在这种增益倾斜介质中形成的非对称光脉冲的特性。我们推导了经典浅水方程的耗散光修正，突出了这种现象与流体动力学波破碎之间的类比。这些发现有助于深入了解能够在不发生波破碎的情况下积累大非线性相位的非对称光脉冲的本质，这是非线性光纤放大器设计中的一个关键方面。
