An integrated electro-optic modulator based on a waveguide Bragg grating in thin-film lithium niobate is introduced. The compact device with a footprint of $10\times 400\,\,\mu \text {m}^{2}$ displays an optical extinction ratio of 53.8 dB at a wavelength of 1555.9 nm in the C-band. With a simple intensity modulation and direct detection scheme, data rates up to 100 Gbit/s are demonstrated with 2-, 4- and 8-level pulse-amplitude modulation formats. The optical filter characteristic of a waveguide Bragg grating modulator suppresses one optical sideband, resulting in inherent single sideband modulation. This enables transmission of a 100 Gbit/s on-off keying signal over 12 km of standard single-mode fiber at 1559.05 nm, without the need for chromatic dispersion compensation.

中文翻译：

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铌酸锂薄膜中的 100 GBd 波导布拉格光栅调制器

介绍了一种基于铌酸锂薄膜波导布拉格光栅的集成电光调制器。占地面积为 $10\times 400\,\,\mu \text {m}^{2}$ 的紧凑型设备在 C 波段的 1555.9 nm 波长处显示出 53.8 dB 的光学消光比。通过简单的强度调制和直接检测方案，2、4 和 8 级脉冲幅度调制格式演示了高达 100 Gbit/s 的数据速率。波导布拉格光栅调制器的滤光器特性抑制了一个光学边带，导致固有的单边带调制。这使得 100 Gbit/s 开关键控信号在 1559.05 nm 的标准单模光纤上传输 12 公里，无需色散补偿。