Microresonator frequency comb-based high-speed data transmission provides a pathway towards augmented data capacity without increasing the number of laser sources. Their use with intensity-modulated direct detection modulation (IMDD) formats is especially pertinent in data center communications where minimizing cost, latency and complexity is paramount. This however implies that the same extent of digital signal processing techniques commonly used in coherent detection for the management of fiber impairments including chromatic dispersion are not available. With the proliferation of silicon photonics technologies in data center transceivers integrated dispersion compensation which can overcome fiber impairments would be of great merit. We demonstrate low power generation of the primary comb state in a silicon nitride microresonator and transmission of 25 Gb/s NRZ and 50 Gb/s PAM4 data over 20 km of single mode fiber. This represents the longest fiber reach demonstrated to date for the transmission of IMDD data using an integrated, microresonator frequency comb. An integrated, tunable grating device for dispersion compensation that reduces dispersion impairments after several fiber lengths generates significant improvements in the eye diagram, six orders of magnitude improvement in the bit-error rate and 14 dB improvement in the transmitter and dispersion eye closure quaternary values. Concurrently, doubling data transmission is demonstrated via polarization multiplexing a comb line and successful dispersion compensation of up to 20 km.

中文翻译：

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通过微谐振器频率梳进行高速数据传输，并具有色散补偿，以提高数据速率和范围

基于微谐振器频率梳的高速数据传输提供了一种在不增加激光源数量的情况下增强数据容量的途径。它们与强度调制直接检测调制 (IMDD) 格式的使用特别适用于数据中心通信，在数据中心通信中，最大限度地降低成本、延迟和复杂性至关重要。然而，这意味着通常用于相干检测以管理光纤损伤（包括色散）的相同程度的数字信号处理技术不可用。随着硅光子技术在数据中心收发器中的普及，能够克服光纤损伤的集成色散补偿将具有巨大的优点。我们展示了氮化硅微谐振器中主梳状状态的低功率生成以及在 20 km 的单模光纤上传输 25 Gb/s NRZ 和 50 Gb/s PAM4 数据。这代表了迄今为止使用集成微谐振器频率梳传输 IMDD 数据的最长光纤距离。用于色散补偿的集成可调光栅装置可减少多个光纤长度后的色散损伤，从而显着改善眼图，将误码率提高六个数量级，并将发射机和色散眼图闭合四元值提高 14 dB。同时，通过偏振复用梳状线和成功的长达 20 公里的色散补偿，证明了双倍数据传输。