(a)
(b)
(c)
(d)
Figure 7: Stress intensity, N/mm2. (a) Yb:YAG with crystal length 15 mm, radius  mm, and pump power 20 watts. (b) Yb:YAG with crystal length 15 mm, radius  mm, and pump power 10 watts. (c) Nd:KGW with crystal length 15 mm, radius  mm, and dual pump power 10 watts. (d) Nd:KGW composite with crystal length 15 mm, radius  mm, and pump power 10 watts and undoped cap of 5 mm.