Lasing characteristics of an F + 3 center laser in LiF crystal Grigorov, V. A. ; Ivanov, N. A. ; Inshakov, D. V. ; Martynovich, E. F. ; Khulugurov, V. M. Abstract Publication: Optics and Spectroscopy Pub Date: November 1986 Bibcode: 1986OptSp..61..718G