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提出了一种两级级联的掺铒光纤超荧光光纤光源(SFS)的新结构,采用耦合器将一个1 480 nm半导体(LD)泵浦源按照一定的分光比对第二级进行双向泵浦,第一段光纤未泵浦。通过研究两级光纤长度的比例、耦合器的分光比对结构性能的影响,优化结构参数后线宽扩展13 nm,输出效率提高6%,并且该结构的中心波长也具有对泵浦功率不敏感的特性。
A new two-stage cascaded Erbium-doped fiber super-fluorescent fiber light source (SFS) was proposed. The coupler was used to couple a 1 480 nm semiconductor (LD) pump source to the second stage with a bidirectional pump Pu, the first paragraph of optical fiber is not pumped. By studying the ratio of the two-stage fiber length and the coupler’s splitting ratio to the structural performance, the line width is extended by 13 nm after optimizing the structural parameters, and the output efficiency is increased by 6%. The center wavelength of the structure is also insensitive to the pump power Features.