[1] Mcers L E, Eckardt R C, Fejer M M, et al. Quasi-phase-matched optical parametric oscillators in bulk periodically poled LiNbO3. J.Opt.Am.B, 1995, 12: 2102-2116
[2] Byer R L. Quasi-phasematched nonlinear interactions and devices. J. Nonlinear Opt. & Materials, 1997, 6: 549-592
[3] Bisson S E, Armstrong K M, Kulp T J, et al. Broadly tunable, mode-hop-tuned cw optical parametric oscillator based on periodically poled lithium niobate. Appl.Opt., 2001, 40:6049-6053
[4] Wen Jin-ke, Wang Liang, Tang Yan-sheng, et al. Enhanced resistance to photorefraction and photovoltaic effect in Li-rich LiNb3: Mg crystals. Appl.Phys.Lett., 1988, 53(4): 260-262
[5] Capmany J, Montoya E, Bermudez V, et al. Self-frequency doubling in Yb3+ doped periodically poled LiNbO3: MgO bulk crystal. Appl.Phys.Lett., 2000, 76(11): 1374-1376
[6] Gopalan V, Mitchell T E, Furukawa Y, et al. The role of nonstoichiometry in 180°domain switching of LiNbO3 crystals. Appl.Phys.Lett., 1998, 72: 1981-1983
[7] YAO Jiang-Hong, XU Jiang-Jun, ZHANG Guang-yin, et al. Domain reversal characteristics of near-stoichiometric LiNbO3 crystals. Chin.Phys.Lett., 2000, 17: 513-514
[8] Furukawa Y, Kitamura K, Takekawa S, et al. Stoichiometric Mg: LiNbO3 as an effective material for nonlinear optical. Opt.Lett., 1998, 23: 1892-1894
[9] Furukawa Y, Kitamura K, Takekawa S, et al.Photorefraction in LiNbO3 as an function of [Li]/[Nb] and MgO concentrations. Appl.Phys.Lett., 2000, 77: 2494-2496
[10] Wohlecke M, Corradi G, Betzler K, et al.Optical methods to characterize the composition and homogeneity of lithium niobate single crystals. Appl.Phys B., 1996, 63: 323-330
[12] Iyi N, Kitamura K, Izumi F, et al. Compative study of defect structures in lithium niobate with different compositions. J. Solid State Chem., 1992, 101: 340-352