全光纤同带泵浦宽带掺镱超荧光光纤光源的实验研究

发布时间：2018-07-01 20:01

本文选题：超荧光光纤光源 + 全光纤　；参考：《红外与激光工程》2016年08期

【摘要】：采用自制的1 018 nm光纤激光器做泵浦源,建立了全光纤同带泵浦的宽带掺镱超荧光光纤光源实验系统,首次利用同带泵浦对单程前向结构的超荧光产生进行了深入的实验研究。研究结果表明:基于同带泵浦的掺镱超荧光光源的斜率效率高达88%,半极大全宽度(Full Width at Half Maximum,FWHM)最宽可以达到14.81 nm。掺镱光纤长度的改变,将影响超荧光光源的最大输出功率、斜率效率及中心波长,随着掺镱光纤长度的增加,最大输出功率和斜率效率下降,中心波长红移。固定光纤长度,改变泵浦功率,随着泵浦功率的增加,超荧光的最大功率和FWHM增加,光谱中心波长偏移很小。在掺镱光纤长度为5.7 m时,超荧光光源的最宽FWHM为14.81 nm,斜率效率在80.3%以上,输出功率的波动小于1%,没有驰豫振荡出现。
[Abstract]:Using a self-made 1018nm fiber laser as the pumping source, an experimental system of wide-band ytterbium-doped superfluorescent fiber source pumped by all-fiber is established. For the first time, the single-pass forward structure superfluorescence is studied by using the same band pump. The results show that the slope efficiency of ytterbium-doped superfluorescent light source based on co-band pumping is as high as 88 and the maximum width of full width at half maximum FWHM can reach 14.81 nm. The change of ytterbium-doped fiber length will affect the maximum output power, slope efficiency and center wavelength of superfluorescent light source. With the increase of ytterbium-doped fiber length, the maximum output power and slope efficiency will decrease, and the center wavelength will shift red. With the increase of pump power, the maximum power of superfluorescence and FWHM increase, and the shift of spectral center wavelength is very small. When the length of ytterbium-doped fiber is 5.7 m, the maximum FWHM of superfluorescent light source is 14.81 nm, the slope efficiency is over 80.3%, the fluctuation of output power is less than 1 and there is no relaxation oscillation.
【作者单位】：北京交通大学电子信息工程学院;
【基金】：国家自然科学基金(61475016)
【分类号】：TN248;TN253

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