(a)
(b)
(c)
Figure 5: Index of refraction profile obtained from FEA and parabolic fit for (a) Nd:YAG with length 10 mm and radius  mm; (b) Nd:KGW with length 15 mm and radius  mm; (c) Yb:YAG with length 15 mm and radius  mm. Pump power is 10 W for all cases.