Abstract
The output characteristics of high power ytterbium-doped fiber super-fluorescent sources were analyzed. 75.7W output power can be achieved when the 915nm pump power is 100W, and the fiber length is 10m.when the pump power changes from 20 to 100W, the backward super-fluorescent power is always larger than the forward. The mean wavelength of the forward and backward super-fluorescent is very stable. The spectrum width all decrease. The spectrum width of forward ASE changes from 24.8nm to 21.4nm when the pump power changes from 20 to 100W. The spectrum width of backward ASE changes from 25.5nm to 22.3nm.
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