Excited state absorption and gain measurements in Cr doped LiNbGeO5 and K3Nb3Si2O13 single crystals H. MANAA, F. DEGHOUL, R. MONCORGE, A.A. KAMINSKII, A.V. BUTASHIN et B. MILL J. Phys. IV France, 04 C4 (1994) C4-427-C4-430 DOI: 10.1051/jp4:19944102