The rapid growth of digital services has led to a widespread deployment of opto-electronics that furnish the Internet as an efficient communication backbone. The electroabsorption-modulated laser (EML) is a representative example of a monolithic integrated electro-optic converter that has early become a commodity: it has been widely adopted in telecommunication networks in virtue of its cost- and energy-efficient light generation and modulation. This study reviews the state-of-the-art of EML applications. Despite its simplicity, the EML addresses numerous use cases that require either the transmission or the reception of optical signals, such as equaliser-free high-bandwidth intensity modulation/direct-detection links at low signal drive, analogue signal transmission with high signal integrity, spectral sculpting for dispersion-tolerant transmission and vector modulation. Full-duplex transceiver functionality in lieu of a pair of dedicated half-duplex sub-systems is eventually attained by combining transmission and reception. This strategy of significantly reducing the cost for a bidirectional communication engine will be discussed for coherent digital data and analogue radio-over-fibre transmission and optical ranging. The maturity of EMLs as coherent transceivers will be evidenced by a small penalty for realising full-duplex transmission and the accomplishment of homodyne detection, which obviates digital signal processing for the purpose of signal recovery.

中文翻译：

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电吸收调制激光器作为光发射器和接收器：现状和机遇

数字服务的快速增长导致光电技术的广泛部署，使互联网成为有效的通信骨干网。电吸收调制激光器（EML）是单片集成电光转换器的代表示例，该单芯片集成电光转换器早已成为商品：由于其成本和能源效率高的光生成和调制，它已在电信网络中被广泛采用。这项研究回顾了EML应用程序的最新水平。尽管它很简单，但是EML解决了许多需要发送或接收光信号的用例，例如在低信号驱动下无均衡器的高带宽强度调制/直接检测链路，具有高信号完整性的模拟信号传输，频谱雕刻，用于色散容限传输和矢量调制。通过组合发送和接收，最终可以实现全双工收发器功能来代替一对专用的半双工子系统。对于相干的数字数据以及模拟的光纤无线传输和光学测距，将讨论这种显着降低双向通信引擎成本的策略。EML作为相干收发器的成熟将通过实现全双工传输和实现零差检测的小代价来证明，这消除了出于信号恢复目的而进行的数字信号处理。对于相干的数字数据以及模拟的光纤无线传输和光学测距，将讨论这种显着降低双向通信引擎成本的策略。EML作为相干收发器的成熟将通过实现全双工传输和实现零差检测的小代价来证明，这消除了出于信号恢复目的而进行的数字信号处理。对于相干的数字数据以及模拟的光纤无线传输和光学测距，将讨论这种显着降低双向通信引擎成本的策略。EML作为相干收发器的成熟将通过实现全双工传输和实现零差检测的小代价来证明，这消除了出于信号恢复目的而进行的数字信号处理。