Combined effect of Yb inversion and pump photons on photodarkening in Yb laser fibers: experiments and model considerations

For constant Yb inversion and to increase pump power in the fiber core, a strong acceleration of the photodarkening (PD) process and a reduction in PD loss have been observed. The PD parameters determined by fitting the measured curves with the stretched exponential function are linked to the ...

Source: Journal of the Optical Society of America B - August 10, 2019 Category: Physics Authors: Sylvia Jetschke Martin Leich Sonja Unger Ulrich R ö pke Source Type: research