Photothermal refractive effect in silicate glasses Borgman, V. A. ; Glebov, L. B. ; Nikonorov, N. V. ; Petrovskii, G. T. ; Savvin, V. V. ; Tsvetkov, A. D. Abstract Publication: Soviet Physics Doklady Pub Date: November 1989 Bibcode: 1989SPhD...34.1011B