[1] [1] Motes A,Kim J J. Intensity-dependent absorption coefficient in photorefractive BaTiO3 crystals.J Opt Soc Am B ,1987,4(9):1379～1381

[2] [2] Holtmann L,Buse K,Kuper G,et al.Conductivity and light-induced absorption in KNbO3:Fe.Appl phys (A)1991,53(1):81～85

[3] [3] Corner L,Ramos-Garcia R,Petris A,et al .Experimental and theoretical characterization of rhodium-doped barium titanate .Opt Commu,1997,143(1):165～172

[4] [4] Song Hongwei,Dou S X,Chi Mingjun,Gao Hong, et al .Light-induced absorption and properties of shallow impurity levels in undoped and Ce-doped BaTiO3.J Opt Soc Am(B)1998, 15(7):1850～1855

[5] [5] Buse K,Bierwirth T.Dynanics of light-induced absorption in BaTiO3 and application for intensity stabilization .J Opt Soc Am(B),1995,12 (4):629～637

[6] [6] Temple D A,Warde C.Photoinduced optical absorption in BaTiO3:Fe.Appl Phys Lett,1991,59(1):4～6

[7] [7] Jermann F,Otten J.Lingt-induced charge transport in LiNbO3:Fe at high intensity. J Opt Soc Am (B) 1993,10(11):2085～2092

[8] [8] Garret M H,Tayebati P,Chang J Y,et al.Shallow-trap-induced positive absorptive two-beam coupling"gain"and light-induced transparency in nominally undoped barium titanate .J Appl Phys, 1992,72(5):1965～1969

[10] [10] Hu Juguang,Xu Xinguang, Mu Xiaodong ,et al .Temperature dependence of photorefractives of a Cu-doped barium strontium potassium sodiun niobate crystal .Opt Commu ,1999,164(2):219～222

[11] [11] Segev O,Mordechai S,Yariv A, et al .Light induced absorption in photorefractive strontium barium niobate .Opt Lett ,1994,19(17):1293～1295