Chung Hung-Ching, Wang Tai-Chun, Hung Yung-Jr, Tseng Shuo-Yen
Opt Express. 2020 Mar 30;28(7):10350-10362. doi: 10.1364/OE.385995.
We design and fabricate a series of broadband silicon arbitrary power splitters with various split ratios using shortcuts to adiabaticity. In this approach, the system evolution is designed using the decoupled system states, and the desired split ratios are guaranteed by the boundary conditions. Furthermore, the system evolutions are optimized to be as close to the adiabatic states as possible, thus enhancing the robustness to wavelength and fabrication variations. The devices are more compact then the conventional adiabatic designs. Fabricated devices show broadband response for a wide wavelength range from 1.47 to 1.62 µm and also have excellent robustness against fabrication errors across an 8-inch wafer.
我们利用绝热捷径设计并制造了一系列具有不同分光比的宽带硅任意功率分配器。在这种方法中，利用解耦的系统状态设计系统演化，并通过边界条件保证所需的分光比。此外，对系统演化进行优化，使其尽可能接近绝热状态，从而增强对波长和制造变化的鲁棒性。这些器件比传统的绝热设计更紧凑。制造的器件在1.47至1.62 µm的宽波长范围内显示出宽带响应，并且在整个8英寸晶圆上对制造误差也具有出色的鲁棒性。
