论文标题
在无限周期系统中是否可能进行单模激光？
Is single-mode lasing possible in an infinite periodic system?
论文作者
论文摘要
在这封信中，我们提出了一种严格的方法来研究周期性激光系统的稳定性。在线性模型中，模式连续体的存在（任意接近激光阈值）给人的印象是，稳定的单模速度不能保持在无限系统的极限中。但是，我们表明，与带曲率相比，麦克斯韦方程式的非线性效应在激光器失调的迹象上具有简单的稳定性条件，可以导致稳定的系统接近阈值。我们检查带边缘（1D）和界限（2D）激光模式，并验证我们的稳定性结果，以针对时间域模拟。
In this Letter, we present a rigorous method to study the stability of periodic lasing systems. In a linear model, the presence of a continuum of modes (with arbitrarily close lasing thresholds) gives the impression that stable single-mode lasing cannot be maintained in the limit of an infinite system. However, we show that nonlinear effects of the Maxwell-Bloch equations can lead to stable systems near threshold given a simple stability condition on the sign of the laser detuning compared to the band curvature. We examine band-edge (1d) and bound-in-continuum (2d) lasing modes and validate our stability results against time-domain simulations.
