Abstract
Ytterbium-doped silica fibers exhibit very broad absorption and emission bands, from 800nm to 1064nm for absorption and 970nm to 1200nm for emission. Therefore wide band lasers can be obtained using a wide variety of pump lasers. In this paper, the characteristics of high-doped Yb 3+ fiber are analyzed and verified by experiment and a highly-doped Yb 3+ fiber ring laser with short cavity has been presented. Comparing with normal Yb 3+ doped fiber, the relationship between the important characteristics of the Yb 3+ doped fiber laser such as threshold power, output power and laser parameters such as pump power, fiber length, output couple ratio is analyzed. Numerical results are coincident with the experiment phenomenon very well. A 1053 nm pulse has been achieved in our fiber laser. The output power is 6mW as pump power is 110mW and the slope efficiency is 17%. The Yb 3+ fiber laser we produced can be used as a stable source in obtaining ultrafast pulse, fiber sense and optical communications.
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