We demonstrate a single-arm Mach-Zehnder interferometer (SAMZI) modulator based on asymmetric long-period gratings for TE 0 -TE 1 mode conversion integrated with a p-n junction doped waveguide for relative phase modulation between these modes via the electro-optic effect. The device consists of two long-period grating sections, with the active waveguide modulator section in-between, and inverse tapers at the input (to couple in only the TE 0 mode), and the output (to filter out the excited TE 1 mode). The periodicity dictates a central mode conversion wavelength and thus the region of operation for the modulator. Simulations are performed to investigate passive device properties, such as central wavelength sensitivity, free spectral range, and coupling coefficient, as well as active performance of the modulator. A fabricated device was characterized with a central wavelength of 1490 nm, a free spectral range of 0.975 nm, and a therma...

中文翻译：

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绝缘体上硅单臂马赫曾德尔干涉仪（SAMZI）调制器

我们演示了基于不对称长周期光栅的单臂马赫曾德尔干涉仪（SAMZI）调制器，用于TE 0 -TE 1模式转换，并集成了pn结掺杂波导，用于通过电光效应在这些模式之间进行相对相位调制。该器件由两个长周期光栅部分组成，中间是有源波导调制器部分，在输入端（仅在TE 0模式下耦合）和在输出端（用于滤除激发的TE 1模式）的反向锥度构成）。周期性指示中心模式转换波长，并因此指示调制器的工作区域。进行仿真以研究无源器件的特性，例如中心波长灵敏度，自由光谱范围和耦合系数，以及调制器的有源性能。