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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。
A self-made 1 018 nm fiber laser was used as a pump source, a full-fiber broadband pump-doped broadband ytterbium-doped super-fluorescence fiber source experiment system was established. For the first time, the generation of superfluorescence with one-way forward structure Experimental study. The results show that the slope efficiency of the Yb-doped super-fluorescence source with pumped pump can reach as high as 88%, and the widest FWHM (FWHM) can reach 14.81 nm. Ytterbium-doped fiber length changes will affect the maximum output power, slope efficiency and center wavelength of the super-fluorescent light source. As the length of Ytterbium-doped optical fiber increases, the maximum output power and slope efficiency will decrease, and the center wavelength will shift red. Fixed fiber length, changing the pump power, with the increase of pumping power, the maximum power of super-fluorescence and FWHM increase, the spectral center wavelength shift is small. When the length of ytterbium-doped fiber is 5.7 m, the maximum FWHM of super-fluorescent light source is 14.81 nm, the slope efficiency is above 80.3%, the fluctuation of output power is less than 1%, and no relaxation oscillation appears.