2.8 μm Er ∶ZBLAN中红外光纤激光器研究

中红外波段激光光源在环境监测、材料加工、外科手术、军事等领域发挥重要作用。泵浦低损耗、高浓度Er³⁺掺杂ZBLAN(Er ∶ZBLAN)光纤是产生近3 μm激光输出的主要手段之一,相较于其他同波段固态激光器,Er ∶ZBLAN光纤激光器具有易集成、效率高,可采用激光二极管直接泵浦等优势,性能日渐提升的Er ∶ZBLAN光纤激光器有望成为3 μm波段最先发展成熟、走向应用的激光光源。本文主要介绍Er ∶ZBLAN光纤激光器工作原理和发展现状,对三种不同的Er ∶ZBLAN光纤激光器存在的问题进行分析和总结,最后对Er ∶ZBLAN光纤激光器发展趋势进行展望。

Research Progress on Er ∶ZBLAN Mid-Infrared Fiber Lasers Emitting at 2.8 μm

The mid-infrared (MIR) region plays an important role in the fields of environmental monitoring, material processing, surgery and defense. Currently, low-loss high-concentration Er³⁺-doped ZBLAN (Er ∶ZBLAN) fiber is one of the main promising gain media for 3 μm MIR laser sources. Er ∶ZBLAN fiber lasers have the advantages of being easily integrated, highly efficient and directly diode-pumped in comparison to other 3 μm-class lasers. With improving performance, Er ∶ZBLAN lasers are expected to reach maturity and commercialized at wavelength of near 3 μm firstly. The working principle and status of Er ∶ZBLAN fiber laser were briefly described in this paper, and the existing problems of three different Er ∶ZBLAN fiber lasers were analyzed and summarized. Finally, the development trends were also prospected.