In recent years, with the accelerating development of high power fiber lasers based on large-mode-area double-clad gain fibers, more and more OPOs utilize fiber lasers as the pump source, to obtain improved performance and to meet the requirement of more compact and stable configuration. 近年来,随着基于大模场双包层增益光纤的高功率光纤激光器的迅速发展,越来越多的OPO采用光纤激光器作为泵浦源,在提高效率的同时使系统更加紧凑、稳定。