Martínez-Garaot Sofía, Muga Juan Gonzalo, Tseng Shuo-Yen
Opt Express. 2017 Jan 9;25(1):159-167. doi: 10.1364/OE.25.000159.
We propose a fast quasiadiabatic approach to the design of optical waveguide devices. This approach distributes the system adiabaticity homogeneously over the device length, thus providing a shortcut to adiabaticity at a shorter device length. A mode sorting asymmetric Y junction is designed by redistributing the adiabaticity of a conventional linearly separating Y junction. Simple procedures for the design of fast quasiadiabatic devices are outlined, and the designed Y junction features large bandwidth at a shorter length than the conventional linearly separating Y junction. The proposed device is verified with beam propagation simulations. A mode conversion efficiency of larger than 99% is observed for the designed Y junction over a 220 nm range.
我们提出了一种用于光波导器件设计的快速准绝热方法。该方法在器件长度上均匀分布系统绝热性，从而在较短的器件长度下提供了一条通向绝热性的捷径。通过重新分配传统线性分离Y结的绝热性，设计了一种模式分选非对称Y结。概述了快速准绝热器件的简单设计程序，所设计的Y结在比传统线性分离Y结更短的长度下具有大带宽。通过光束传播模拟验证了所提出的器件。在所设计的Y结220nm范围内观察到模式转换效率大于99%。
