随着网络带宽需求呈爆发式增长，波分复用技术从主干网下沉到城域网和终端用户侧的接入网，作为波分网络核心器件的低成本可调谐半导体激光器日益受到关注。本文回顾了可调谐半导体激光器的发展历程，分类阐述了不同方案可调谐半导体激光器的工作原理和性能，评析了典型商用可调谐光模块的优缺点，并重点介绍了低成本V型腔可调谐激光器的研究和产业化应用进展。

As the demand for network bandwidth is growing explosively, the deployment of the wavelength division multiplexing technology is extending from the backbone network to the metropolitan area network and the access networks. Low-cost tunable semiconductor lasers, which are the core components of wavelength division networks, are attracting increasing attention. This paper reviews the development of semiconductor tunable lasers, describes the working principles and performance of various tunable lasers, and analyzes the advantages and disadvantages of typical commercial tunable optical modules. The research and industrial application progress of low-cost tunable V-cavity lasers are mainly introduced.