Zhao Yingming, Li Yu, Huang Weiping
Appl Opt. 2022 Apr 1;61(10):2610-2619. doi: 10.1364/AO.453285.
A physical model is demonstrated to optimize narrow-linewidth distributed feedback lasers based on apodized laterally coupled gratings (AG-DFB). The structure can effectively suppress the longitudinal spatial hole burning as well as remove the regrowth process during fabrication by using the apodized grating geometry. The studies include numerical simulations of the AG-DFB laser for its static and dynamic behaviors at different cavity lengths and facet coating conditions. The results show that the proposed device can achieve narrow linewidth, high slope efficiency, and broad modulation bandwidth, as compared to /4 phase-shifted DFB lasers.
展示了一种物理模型，用于优化基于变迹横向耦合光栅（AG-DFB）的窄线宽分布反馈激光器。通过采用变迹光栅几何结构，该结构可以有效抑制纵向空间烧孔，并消除制造过程中的再生长工艺。研究包括对AG-DFB激光器在不同腔长和端面镀膜条件下的静态和动态行为进行数值模拟。结果表明，与/4相移DFB激光器相比，所提出的器件可以实现窄线宽、高斜率效率和宽调制带宽。
