一种新颖的反射结构高功率超宽带光纤光源

报道了一种新型高功率超宽带光纤光源。利用980nm激光二极管(LD)和1480nmLD双向抽运掺铒光纤，经光纤环镜反射后，得到C L波段自发辐射谱。通过调整980nmLD和1480nmLD的功率，在1524．O～1600．6nm(76．6nm)范围内，自发辐射谱功率高于-18．8dBm，并且在1539．2～l600．6nm(61．4nm)范围内，自发辐射谱的平坦度为2．8dB。总荧光功率为22．1mW。转换效率为18．8％。如果不加环镜，并且保持相同的抽运条件，得到的放大自发辐射(ASE)谱宽在1525～1565nm的C波段范围，其总的荧光功率为7．1mW，转换效率仅为6％。通过分析加环镜情况与不加环镜情况下所得到的自发辐射谱，以及加环镜情况下采用不同的抽运方式得到的自发辐射谱，最终得出结论，通过加环镜，并且用980nmLD和1480nmLD双向抽运，得到了具有最佳效果的超宽带光纤光源。实验过程中通过调整980nmLD和1480nmLD的功率，曾得到28．5mW的荧光功率，转换效率为22．3％。

A Novel High Power and Ultra Bandwidth Superfluorescence Source with Reflected Structure

A novel structure high power and ultra bandwidth superfluorescence source is reported in this paper. With bi directional pump of 980 nm LD and 1480 nm LD,C+L band ASE reflected by fiber loop mirror is got. By adjusting the power of LDs, 76 6 nm bandwidth from 1524 0 to 1600 6 nm is acquired where the ASE power is higher than -18 8 dBm, and from 1539 2 nm to 1600 6 nm (61 4 nm), the flatten of ASE is within 2 8 dB. The total ASE power is 22 1 mW and the power conversion rate is 18 8%. Without the fiber loop mirror, only C band ASE from 1525 to 1565 nm is got while the pump condition remains the same. The total ASE power is 7.1 mW and the power conversion rate is only 6%. From the experiment, the best ultra bandwidth superfluorescence source with the ASE power of 28 5 mW and the power conversion rate of 22 3% is acquired by adjusting the bi directional pump power of LDs and using fiber loop mirror.