Longhi Stefano
Opt Lett. 2022 Apr 15;47(8):2040-2043. doi: 10.1364/OL.456100.
Inspired by the idea of non-Hermitian spectral engineering and non-Hermitian skin effect, a novel, to the best of our knowledge, design for stable emission of coupled laser arrays with tunable phase locking and strong supermode competition suppression is suggested. We consider a linear array of coupled resonators with asymmetric mode coupling displaying the non-Hermitian skin effect and show that, under suitable tailoring of complex frequencies of the two edge resonators, the laser array can stably emit in a single extended supermode with tunable phase locking and with strong suppression of all other skin supermodes. The proposed laser array design offers strong robustness against both structural imperfections of the system and dynamical instabilities typical of semiconductor laser arrays.
受非厄米光谱工程和非厄米趋肤效应概念的启发，据我们所知，提出了一种用于耦合激光阵列稳定发射的新颖设计，该设计具有可调谐锁相和强超模竞争抑制特性。我们考虑了具有非对称模式耦合的耦合谐振器线性阵列，其呈现非厄米趋肤效应，并表明，在对两个边缘谐振器的复频率进行适当调整的情况下，激光阵列能够在单个扩展超模中稳定发射，具有可调谐锁相且能强烈抑制所有其他趋肤超模。所提出的激光阵列设计对系统的结构缺陷和半导体激光阵列典型的动态不稳定性都具有很强的鲁棒性。
