随着数据中心、5G宽带无线通信的不断发展,短距宽带传输的需求大幅增长,极大地推动了高速光电器件的发展。在短距应用中,虽然直接调制激光器具有低成本、低功耗的优势,但其调制带宽和传输距离受到张弛振荡频率和频率啁啾的限制。电吸收调制激光器(EML)集成光源具有大调制带宽、低频率啁啾的特点,可以实现更高速率和更远距离的传输。介绍了EML集成光源的外延集成方案和器件结构,并介绍了国内外研究机构对高速率、大功率、低成本EML的主要研究进展,最后对EML的未来发展进行了展望。

The continuous growth of data centers and 5G wideband wireless communication is driving toward an ever increasing demand for short-distance broadband fiber transmission, which has greatly promoted the development of high-speed optoelectronic devices. In short-distance applications, although directly modulated lasers have the advantages of low cost and low power consumption, the modulation bandwidth and transmission distance are limited by the relaxation oscillation frequency and frequency chirp. On the other hand, an electroabsorption modulated laser (EML) exhibits wide modulation bandwidth and low frequency chirp, thus allowing transmission with higher bit-rate and over longer distance. In this paper, the integration schemes and device structure of EML integrated light source are discussed. Recent progress in high-speed, high power, and low cost EML devices is summarized. Finally, a prospect for future development of EML is presented.