Highly-doped Yb/sup 3+/ fiber ring laser with short cavity

In this paper, a highly-doped Yb/sup 3+/ fiber ring laser with short cavity has been presented. Comparing with normal Yb/sup 3+/ doped fiber, the relationships between the important characteristics of the Yb/sup 3+/ doped fiber laser such as threshold power, output power and laser parameters such as pump power, fiber length, couple ratio are analyzed. Numerical results are coincident with the experiment phenomenon.