Fabrication and characterization of a new inverse constant-loss taper (CLT)

我们设计了一种新的，最佳的，倒锥形结构，引导光从外部激光器在芯片上。这 锥形有助于将光模从紧密限制的Si微光子波导转换为标准， 大模径光纤。如果没有这样的设备，约95%的光会损失，而使用这样的设备， 只有约10%丢失。我们的工业合作伙伴Teraxion对这种设备有着强烈的需求。他们正在采取行动 远离使用垂直光栅将光耦合到他们的设备，并朝着对接耦合的锥形移动， 作为我们在这里提出的设备。对接耦合锥形具有带宽更高的优点 以及减少的对准约束。在这里，我们建议建立我们的第一个实验示范， 模型化，最佳化。倒锥形结构。

We have designed a new, optimal, inverse taper structure to guide light on chip from an external laser. This taper helps convert the optical mode from a tightly confined, Si-microphotonic waveguide to a standard, large-mode-diameter, optical fiber. Without such a device, ~95% of the light is lost and with such a device only ~10% is lost. Teraxion, our industrial collaborator, has a strong need for such a device. They are moving away from coupling light to their devices using vertical gratings and moving towards butt-coupled tapers, such as the device that we are proposing to make here. Butt-coupled tapers offer the advantages of higher bandwidth and reduced alignment constraints. Here we propose to build the first experimental demonstration of our modeled, optimal. inverse taper structures.