Schiek Roland
Opt Express. 2021 May 10;29(10):15830-15851. doi: 10.1364/OE.425626.
The smooth transition between stable, Talbot-effect-dominated and modulationally unstable nonlinear optical beam propagation is described as the superposition of oscillating, growing and decaying eigenmodes of the common linearized theory of modulation instability. The saturation of the instability in form of breather maxima is embedded between eigenmode growth and decay. This explains well the changes of beam characteristics when the input intensity increases in experiments on modulation instability and breather excitation in spatial-spatial experimental platforms. An increased accuracy of instability gain measurements, a variety of interesting nonlinear beam scenarios and a more selective and well-directed breather excitation are demonstrated experimentally.
稳定的、以塔尔博特效应为主导的与调制不稳定的非线性光束传播之间的平滑过渡，被描述为调制不稳定的常见线性化理论中振荡、增长和衰减本征模的叠加。以呼吸子极大值形式出现的不稳定性饱和，嵌入在本征模的增长和衰减之间。这很好地解释了在空间 - 空间实验平台上进行调制不稳定和呼吸子激发实验时，输入强度增加时光束特性的变化。实验证明了不稳定增益测量精度的提高、各种有趣的非线性光束情形以及更具选择性和定向性的呼吸子激发。
