[1] Johnson L F,Dietz R E,GuggenheimH J. Spontaneous and stimulated emission from Co2+ ions in MgF2 andZnF2 [J]. Appl. Phys.Lett.,1964,5:21~22
[2] Moulton P F. An investigation of the Co:MgF2 laser system [J]. IEEE J. QuantumElectron.,1985,QE-21:1582~1595