Abstract The growing traffic demand in data center interconnections (DCIs) requires high-speed and low-cost transceivers that can flexibly adapt to different transmission distances up to 80 km or further. In this paper, based on the double-side electro-absorption modulated laser (DS-EML), we propose a transmitter with a fixed 90-degree phase rotation on one side of the DS-EML that can realize quasi-linear complex modulation. We verify the application of the quasi-linear DS-EML for a 112 Gb/s CD pre-compensation 4-level pulse amplitude modulation (PAM4) signal transmission over 320 km by simulation. Compared with the LiNbO3 in-phase quadrature (IQ) modulator and the dual-drive Mach-Zehnder modulator (DDMZM), our proposed transmitter has several obvious advantages, such as low cost, small footprint, ease of integration and reduced power consumption.

中文翻译：

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C 波段 112 Gb/s PAM4 信号传输超过 320 公里，使用准线性双侧电吸收调制激光器 (DS-EML)

摘要 数据中心互连（DCI）不断增长的流量需求需要高速、低成本的收发器，能够灵活适应长达80公里或更远的不同传输距离。在本文中，我们基于双侧电吸收调制激光器（DS-EML），提出了一种在 DS-EML 一侧具有固定 90 度相位旋转的发射器，可以实现准线性复调制。我们通过仿真验证了准线性 DS-EML 在 112 Gb/s CD 预补偿 4 级脉冲幅度调制 (PAM4) 信号传输中的应用。与 LiNbO3 同相正交 (IQ) 调制器和双驱动 Mach-Zehnder 调制器 (DDMZM) 相比，我们提出的发射器具有几个明显的优势，例如低成本、小尺寸、易于集成和降低功耗。