The behavior of Q-switched, free-running, and mode-locked laser oscillators, with one cavity mirror consisting of a stack of thin glass plates, is described. The beam divergence can equal that obtained with a thin film coated dielectric mirror, but intensity and spatial coherence vary over the beam cross section. It is concluded that the stack mirror may be more suitable for high power lasers than the multilayer quarter-wave dielectric mirror because of its greater damage resistance and ease of fabrication.
G. Magyar and A. C. Seiden, "Lasers with Random Stack Mirrors," Appl. Opt. 9, 2040-2044 (1970)