环形腔掺铒光纤激光器的研究
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摘要
本文主要基于掺铒光纤在1550nm波段的增益特性,利用带尾纤的980nm半导体激光器作为泵浦源,铒光纤作为增益介质,布拉格光纤光栅作为谐振腔反射镜,实现了波长为1562.5nm的环形腔光纤激光器,得到了2mW的激光输出。并在掺铒光纤激光器理论分析基础上,讨论了影响激光器输出的各种因素:腔长、输出耦合比、谐振腔损耗。且作了相应的实验,与理论结果相一致。
     文中进一步对稳定激光器的光强输出与调谐进行了研究,采用一种主动式的稳光强方案并取得了一定的效果,同时通过对布拉格光纤光栅的调谐获得了具有很好可重复性的多波长激光输出。
In last few years, Erbium-doped fiber (EOF) laser has attracted more and more attention because of fiber communication. Based on the character of the EOF gain at 1550 nm, a laser diode (LD) worked at 980 nm and acted as the pumping source, a EOF employed as gain medium, and a fiber grating used as reflector, an ring-cavity all-fiber laser worked at 1562.5 nm was demonstrated with an output power of 2.0 mw and a bandwidth of 0. 08nm.
    In this paper, the theory of EOF laser was discussed in detail. The factors that influenced the output of the laser were analyzed theoretically.The output power of the laser was observed to be related with the length of EOF, the coupled-ration of the output coupler and the loss of splicing. Active modes were presented and have been used to stabilize the output power of the laser. By heating fiber bragg grating, EDF laser was tuned and obtained multiwavelength laser output.
引文
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