Compact beam splitters in coupled waveguides using shortcuts to adiabaticity
Compact beam splitters in coupled waveguides using shortcuts to adiabaticity
复制标题
使用绝热捷径的耦合波导中的紧凑分束器
DOI：
10.1088/2040-8986/aab02c
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发表时间：
2018-04-01
影响因子：
2.1
通讯作者：
Tseng, Shuo-Yen
中科院分区：
文献类型：
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作者：
Chen, Xi;Wen, Rui-Dan;Tseng, Shuo-Yen
绝热（三）波导耦合器设备上有各种各样的工作，但大多数都集中在量子光学类比和物理本身。我们成功地将绝热技术的捷径应用于集成光学器件中具有合适长度的耦合波导系统。特别是，采用逆非绝热驱动和幺正变换的方法，克服了以往不切实际的实现方法，并成功地设计出了适用于对称和非对称三波导耦合器的1 × 2和1 × 3分束器。用光束传播法进行的数值模拟表明，这些快捷设计的分束器比绝热设计的分束器更短，并且在间距误差和波长变化方面也比平行波导谐振分束器具有更好的容限。
There are various works on adiabatic (three) waveguide coupler devices but most are focused on the quantum optical analogies and the physics itself. We successfully apply shortcuts to adiabaticity techniques to the coupled waveguide system with a suitable length for integrated optics devices. Especially, the counter-diabatic driving protocol followed by unitary transformation overcomes the previously unrealistic implemention, and is used to design feasible and robust 1 x 2 and 1 x 3 beam splitters for symmetric and asymmetric three waveguide couplers. Numerical simulations with the beam propagation method demonstrate that these shortcut designs for beam splitters are shorter than the adiabatic ones, and also have a better tolerance than parallel waveguides resonant beam splitters with respect to spacing errors and wavelength variation.