Su Logan, Trivedi Rahul, Sapra Neil V, Piggott Alexander Y, Vercruysse Dries, Vučković Jelena
Opt Express. 2018 Feb 19;26(4):4023-4034. doi: 10.1364/OE.26.004023.
We present a gradient-based algorithm to design general 1D grating couplers without any human input from start to finish, including a choice of initial condition. We show that we can reliably design efficient couplers to have multiple functionalities in different geometries, including conventional couplers for single-polarization and single-wavelength operation, polarization-insensitive couplers, and wavelength-demultiplexing couplers. In particular, we design a fiber-to-chip blazed grating with under 0.2 dB insertion loss that requires a single etch to fabricate and no back-reflector.
我们提出了一种基于梯度的算法，用于从头到尾无需任何人工干预地设计通用一维光栅耦合器，包括初始条件的选择。我们表明，我们能够可靠地设计出高效的耦合器，使其在不同几何结构中具备多种功能，包括用于单偏振和单波长操作的传统耦合器、偏振不敏感耦合器以及波长解复用耦合器。特别是，我们设计了一种光纤到芯片的闪耀光栅，其插入损耗低于0.2 dB，制造时只需一次蚀刻且无需背反射器。
