Global data traffic is growing rapidly, and the demand for optoelectronic transceivers applied in data centers (DCs) is also increasing correspondingly. In this review, we first briefly introduce the development of optoelectronics transceivers in DCs, as well as the advantages of silicon photonic chips fabricated by complementary metal oxide semiconductor process. We also summarize the research on the main components in silicon photonic transceivers. In particular, quantum dot lasers have shown great potential as light sources for silicon photonic integration—whether to adopt bonding method or monolithic integration—thanks to their unique advantages over the conventional quantum-well counterparts. Some of the solutions for high-speed optical interconnection in DCs are then discussed. Among them, wavelength division multiplexing and four-level pulse-amplitude modulation have been widely studied and applied. At present, the application of coherent optical communication technology has moved from the backbone network, to the metro network, and then to DCs.

中文翻译：

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用于数据中心的硅光子收发器

全球数据流量快速增长，数据中心（DC）对光电收发器的需求也相应增加。在这篇综述中，我们首先简要介绍了DC中光电收发器的发展，以及互补金属氧化物半导体工艺制造的硅光子芯片的优势。我们还总结了硅光子收发器中主要组件的研究。特别是，量子点激光器作为硅光子集成光源——无论是采用键合方法还是单片集成——都显示出巨大的潜力，这得益于其优于传统量子阱对应物的独特优势。然后讨论了 DC 中高速光互连的一些解决方案。他们之中，波分复用和四级脉幅调制得到了广泛的研究和应用。目前，相干光通信技术的应用已经从骨干网，到城域网，再到数据中心。