To improve the output power and the laser efficiency compared with common fiber Brillouin lasers,a small core photonic crystal fiber(PCF) based ring-cavity Brillouin fiber laser was presented.

• 为提高普通布里渊激光器的输出功率和激光效率；提出一种基于小纤芯光子晶体光纤(PCF)的环形腔布里渊光纤激光器.