Tseng Shuo-Yen, Wen Rui-Dan, Chiu Ying-Feng, Chen Xi
Opt Express. 2014 Aug 11;22(16):18849-59. doi: 10.1364/OE.22.018849.
We propose short and robust directional couplers designed by shortcuts to adiabaticity, based on Lewis-Riesenfeld invariant theory. The design of directional couplers is discussed by combining invariant-based inverse engineering and perturbation theory. The error sensitivity of the coupler is minimized by optimizing the evolution of dynamical invariant with respect to coupling coefficient/input wavelength variations. The proposed robust coupler devices are verified with beam propagation simulations.
我们基于刘易斯 - 里森费尔德不变量理论，提出了通过绝热捷径设计的短而稳健的定向耦合器。通过结合基于不变量的逆向工程和微扰理论来讨论定向耦合器的设计。通过优化动态不变量相对于耦合系数/输入波长变化的演化，使耦合器的误差灵敏度最小化。所提出的稳健耦合器器件通过光束传播模拟得到了验证。
