论文标题
基于多模干涉仪
On-Chip High Extinction Ratio Single-Stage Mach-Zehnder Interferometer based on Multimode Interferometer
论文作者
论文摘要
片上的高灭绝比Mach-Zehnder干涉仪（MZI）始终引起了研究人员的兴趣，因为它可以用于许多在天体pos虫，光学切换，可编程的光子电路和量子信息的应用中。但是，在先前的研究中，仅通过使用多阶段MZI方法才能实现超高片段的片上MZIS。在本文中，我们研究了基于两个级联的多模干涉仪（MMI）的高消光比单级MZI。我们确定TM噪声是可以阻止我们达到高消光比MZI的重要因素。通过引入基于弯曲的TM滤波器而没有额外损失，我们实验表明，这种TM滤波器可以将MMI-MZI的最大灭绝比提高10 dB以上。使用TM滤波器，我们报告了一个单个阶段的高61.2 dB灭绝率，可调节的MMI-MZI仅1.5 dB插入损失且带宽超过60nm。这些结果为许多有趣的应用铺平了道路。
On-chip high extinction ratio Mach-Zehnder interferometers (MZI) have always attracted interest from researchers as it can be used in many applications in astrophotonics, optical switching, programmable photonic circuits, and quantum information. However, in previous research studies, ultra-high extinction ratio on-chip MZIs have only been achieved by using a multi-stage MZI approach. In this paper, we investigate a high extinction ratio single-stage MZI based on two cascaded multimode interferometers (MMI). We determine that TM noise is an important factor that can prevent us from achieving a high extinction ratio MZI. By introducing a bend-based TM filter without additional loss, we experimentally demonstrate that such a TM filter can improve the maximum extinction ratio of the MMI-MZI by more than 10 dB. With the TM filter, we report a record high 61.2 dB extinction ratio in a single stage, thermally tunable MMI-MZI with only 1.5 dB insertion loss and more than 60nm bandwidth. These results pave the way for many interesting applications.
