Significantly increased interests have been witnessed for the 2 µm waveband which is considered to be a promising alternative window for fiber and free-space optical communications. However, the less mature device technology at this wavelength range is one of the primary obstacles toward practical applications. In this work, we demonstrate an efficient and high-speed silicon modulator based on carrier depletion in a coupling tunable resonator. A benchmark high modulation efficiency of 0.75 V·cm is achieved. The 3-dB electro-optic bandwidth is measured to be 26 GHz allowing for up to 34 Gbit/s on–off keying modulation with a low energy consumption of ∼0.24 pJ/bit. It provides a solution for the silicon modulator with high-speed and low power consumption in the 2-µm waveband.

中文翻译：

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2 µm 波段硅跑道环谐振器的高效高速耦合调制

人们对 2 µm 波段的兴趣显着增加，该波段被认为是光纤和自由空间光通信的一个有前途的替代窗口。然而，该波长范围内的器件技术不太成熟是实际应用的主要障碍之一。在这项工作中，我们展示了一种基于耦合可调谐谐振器中的载流子耗尽的高效高速硅调制器。实现了 0.75 V·cm 的基准高调制效率。经测量，3dB 电光带宽为 26 GHz，可实现高达 34 Gbit/s 的开关键控调制，且能耗低至 ∼0.24 pJ/bit。它为2μm波段高速、低功耗的硅调制器提供了解决方案。