随着光通信朝着高速、高带宽和大容量方向发展，开发高性能的光通信用器件并减小器件的体积以降低成本变得越来越重要。电吸收调制激光器（EML）具有体积小、啁啾效应小、驱动电压低和弛豫振荡频率高等优点，成为当前国内外长距离、高速光通信系统的理想光源。然而，EML对温度非常敏感，温度的微弱变化都会影响其工作的稳定性。因此，如何使激光器输出恒定波长和稳定功率的光并延长使用寿命是一项技术难题。介绍了目前研究开发的小型化带制冷电吸收调制激光器所采用的制冷技术和两种主要器件封装技术，就带制冷EML未来的发展方向做出了展望。

Optical communication is heading to high speed, broad bandwidth and large capacity, and it is more and more important to develop optical devices with superior performance and lower cost. Electroabsorption modulated laser (EML) is the ideal light source in long-reach and high speed optical communication at home and abroad because of its small size, tiny chirp, low driving voltage and high relaxation oscillation frequency. However, EML is very sensitive to temperature and the slight changes in temperature will affect the stability of operation. Therefore, it is a technical problem to keep the wavelength and output power stable and extend the life of the EML. Current research and development of cooled laser and the two main device packaging technologies are introduced and a prediction on small-form cooled EML in the future is made.