Chaotic Brillouin Dynamic Grating (BDG) can be individually generated and stably maintained due to the thumbtack-correlation characteristics of chaotic laser, which has its particular advantages over the conventional BDGs. However, the fluctuant sidelobes around chaotic BDG induced by the inherent characteristic of chaotic laser have an adverse effect on the signal-to-noise ratio (SNR) of chaotic BDG system. In this paper, we propose an optical switch scheme to suppress the fluctuant sidelobes around the chaotic BDG to optimize the system performance, which is performed by numerical simulation. By comparing the characteristics of the chaotic BDG with and without the optical switch scheme, it has been verified that the optical switch scheme is an effective suppression method of the fluctuant sidelobes around chaotic BDG. Moreover, the optical switch scheme has a very large parameter space for feedback intensity and injection current to suppress the fluctuant sidelobes around the chaotic BDG. And the reflection characteristics of chaotic BDG based on optical switch are also effectively improved.

中文翻译：

---

基于光开关的混沌布里渊动态光栅周围波动旁瓣的抑制

由于混沌激光器的图钉相关特性，混沌布里渊动态光栅 (BDG) 可以单独生成和稳定保持，这与传统 BDG 相比具有特殊的优势。然而，混沌激光器的固有特性在混沌BDG周围引起的波动旁瓣对混沌BDG系统的信噪比（SNR）产生不利影响。在本文中，我们提出了一种光开关方案来抑制混沌 BDG 周围的波动旁瓣，以优化系统性能，这是通过数值模拟来执行的。通过比较有无光开关方案的混沌BDG的特性，验证了光开关方案是一种有效抑制混沌BDG周围波动旁瓣的方法。而且，光开关方案对于反馈强度和注入电流具有非常大的参数空间，以抑制混沌 BDG 周围的波动旁瓣。并且基于光开关的混沌BDG的反射特性也得到有效改善。