[1] [1] HATANAKA T, NAKAMURA K, TANIUCHI T, et al. Quasi-phase-matched optical parametric oscillation with periodically poled stoichiometric LiTaO3［J］. Optics Letters, 2000, 25(9): 651-653.

[2] [2] KATZ M, ROUTE R K, HUM D S, et al. Vapor-transport equilibrated near-stoichiometric lithium tantalate for frequency-conversion applications［J］. Optics Letters, 2004, 29(15): 1775-1777.

[3] [3] YU N E, KURIMURA S, NOMURA Y, et al. Periodically poled near-stoichiometric lithium tantalate for optical parametric oscillation［J］. Applied Physics Letters, 2004, 84(10): 1662-1664.

[4] [4] LI L Q, ZHANG B, ROMERO C, et al. Tunable violet radiation in a quasi-phase-matched periodically poled stoichiometric lithium tantalate waveguide by direct femtosecond laser writing［J］. Results in Physics, 2020, 19: 103373.

[5] [5] CUI S Z, ZENG X, JIANG H W, et al. Robust single-frequency 589 nm fiber laser based on phase modulation and passive demodulation［J］. Optics Express, 2022, 30(6): 9112-9118.

[7] [7] WIRP A, BUMER C, HESSE H, et al. Magnesium-doped near-stoichiometric lithium tantalate crystals for nonlinear optics［J］. Physica Status Solidi (a), 2005, 202(6): 1120-1123.

[8] [8] KITAMURA K, FURUKAWA Y, NIWA K Z, et al. Crystal growth and low coercive field 180° domain switching characteristics of stoichiometric LiTaO3［J］. Applied Physics Letters, 1998, 73(21): 3073-3075.

[9] [9] HOLTMANN F, IMBROCK J, BUMER C, et al. Photorefractive properties of undoped lithium tantalate crystals for various composition［J］. Journal of Applied Physics, 2004, 96(12): 7455-7459.

[10] [10] KUMARAGURUBARAN S, TAKEKAWA S, NAKAMURA M, et al. Growth of 4-in diameter MgO-doped near-stoichiometric lithium tantalate single crystals and fabrication of periodically poled structures［J］. Journal of Crystal Growth, 2006, 292(2): 332-336.

[11] [11] LIU X Y, TERABE K, KITAMURA K. Stability of engineered domains in ferroelectric LiNbO3 and LiTaO3crystals［J］. Physica Scripta, 2007, T129: 103-107.

[12] [12] BORDUI P F, NORWOOD R G, BIRD C D, et al. Stoichiometry issues in single-crystal lithium tantalate［J］. Journal of Applied Physics, 1995, 78(7): 4647-4650.

[14] [14] FURUKAWA Y, KITAMURA K, SUZUKI E, et al. Stoichiometric LiTaO3 single crystal growth by double crucible Czochralski method using automatic powder supply system［J］. Journal of Crystal Growth, 1999, 197(4): 889-895.

[15] [15] HSU W T, CHEN Z B, YOU C A, et al. Zone-leveling Czochralski growth and characterization of undoped and MgO-doped near-stoichiometric lithium tantalate crystals［J］. Journal of Crystal Growth, 2008, 311(1): 66-71.

[16] [16] SHUMOV D P, ROTTENBERG J, SAMUELSON S. Growth of 3-inch diameter near-stoichiometric LiTaO3 by conventional Czochralski technique［J］. Journal of Crystal Growth, 2006, 287(2): 296-299.

[19] [19] KIM S, GOPALAN V, KITAMURA K, et al. Domain reversal and nonstoichiometry in lithium tantalate［J］. Journal of Applied Physics, 2001, 90(6): 2949-2963.

[20] [20] YANG J F, SUN J, XU J J, et al. Twin defects in thick stoichiometric lithium tantalate crystals prepared by a vapor transport equilibration method［J］. Journal of Crystal Growth, 2016, 433: 31-35.

[22] [22] RAHN J, HEITJANS P, SCHMIDT H. Li self-diffusivities in lithium niobate single crystals as a function of Li2O content［J］. The Journal of Physical Chemistry C, 2015, 119(27): 15557-15561.

[23] [23] SHUR V Y, NIKOLAEVA E V, SHISHKIN E I, et al. Polarization reversal in congruent and stoichiometric lithium tantalate［J］. Applied Physics Letters, 2001, 79(19): 3146-3148.

[24] [24] BIRNIE D P, BORDUI P F. Defect-based description of lithium diffusion into lithium niobate［J］. Journal of Applied Physics, 1994, 76(6): 3422-3428.