首先简要回顾了超短脉冲激光器(LD)的发展史,以及以半导体量子点为有源区的锁模量子点LD的提出及其潜在的、重要应用前景。随后介绍了锁模量子点LD的工作原理、各种锁模方式及其器件结构,进而讨论了量子点作为锁模LD有源区材料所具有的独特优势。最后在介绍锁模量子点激光器已取得的主要研究成果和发展趋势的同时,指出要获得高重复频率、高功率的锁模量子点激光飞秒脉冲,还须进一步对量子点有源区、器件结构和锁模偏置条件等要素进行优化。 Firstly, the development history of ultrashort pulse laser (LD) and the potential and important application prospect of the mode-locked quantum dots LD with semiconductor quantum dots as active region are briefly reviewed. Then the work principle of the mode-locked quantum dot LD, the various mode-locking modes and the structure of the device are introduced, and then the unique advantages of the quantum dot as the mode-locked LD active region material are discussed. Finally, the main research results and development trend of the mode-locked quantum dot lasers have been introduced. At the same time, it is pointed out that to obtain the high repetition frequency and high power mode-locked laser pulses, it is necessary to further study the quantum dot active area , Device structure and clamping bias conditions and other factors to optimize.