Growth and Device Performance of RTP Electro-Optical Crystal

Abstract

Abstract: Rubidium titanyl phosphate (RTP) is an electro-optical (EO) crystal with excellent comprehensive performance, which has the advantages of high electro-optic coefficient, low half-wave voltage, high laser damage threshold as well as compact device, strong environmental adaptability, etc. These characters make it become a new generation of EO materials, suitable for use as EO switches, modulators, and other EO devices. The development of laser systems urgently requires high-performance EO crystals for higher power, higher repetition rate, and narrower pulse width lasers. In this paper, the growth system with high [Rb]/[P] molar ratio was chosen, and high-quality RTP crystal was successfully synthesized by the top seeded solution growth method. Relevant properties of crystal or device were tested, containing the optical uniformity, repetition rate, insertion loss, extinction ratio and laser damage threshold. The results show that, the optical homogeneity of sample is 7.3×10^-6 cm ^-1, repetition frequency of 501 kHz, insertion loss of 0.49%, extinction ratio of 31.57 dB, and laser damage threshold of 856 MW/cm².

Key words: RTP, electro-optical crystal, top seeded solution growth method, optical homogeneity, laser damage threshold

CLC Number:

O78
O734

SHI Shuangshuang, SHI Ruize, WANG Guoying, XIAO Yabo, WANG Haili, CHEN Jianrong. Growth and Device Performance of RTP Electro-Optical Crystal[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(12): 2151-2155.

References

[1] 王继扬, 尹鑫, 张少军, 等. 硅酸镓镧单晶的生长、性质及电光应用的研究[J]. 物理学进展, 2007, 27(3): 344-360.
WANG J Y, YIN X, ZHANG S J, et al. Growth, property and electro-optical application of lagasite crystal[J]. Progress in Physics, 2007, 27(3): 344-360 (in Chinese).
[2] 王继扬, 黄林勇, 覃方丽, 等. 电光晶体研究进展及其对称性研究[J]. 物理学进展, 2012, 32(1): 33-56.
WANG J Y, HUANG L Y, QIN F L, et al. Progress of the electro-optic crystal research and the symmetry dependence of electro-optic effect[J]. Progress in Physics, 2012, 32(1): 33-56 (in Chinese).
[3] 王继扬, 郭永解, 李静, 等. 电光晶体研究进展[J]. 中国材料进展, 2010, 29(10): 49-58.
WANG J Y, GUO Y J, LI J, et al. Progress in electro-optic crystal research[J]. Materials China, 2010, 29(10): 49-58 (in Chinese).
[4] OSELEDCHIK Y S, PISAREVSKY A I, PROSVIRNIN A L, et al. Nonlinear optical properties of the flux grown RbTiOPO₄ crystal[J]. Optical Materials, 1994, 3(4): 237-242.
[5] ROSENMAN G, URENSKI P, AGRONIN A, et al. Nanodomain engineering in RbTiOPO₄ ferroelectric crystals[J]. Applied Physics Letters, 2003, 82(22): 3934-3936.
[6] LEBIUSH E, LAVI R, TZUK Y, et al. High repetition rate end-pumped electro-optic RTP Q-switch Nd∶YVO₄ laser[C]//Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505). September 10-15, 2000, Nice, France.
[7] KANNAN C V, GANESAMOORTHY S, SUBRAMANIAN C, et al. Dielectric properties of self-flux-grown RbTiOPO₄ single crystals[J]. Physica Status Solidi (a), 2003, 196(2): 465-470.
[8] KANNAN C V, GANESAMOORTHY S, SUBRAMANIAN C, et al. One dimensional nature of ionic conductivity in self-flux grown RbTiOPO₄ single crystals[J]. International Journal of Modern Physics B, 2003, 17(3): 373-382.
[9] KARLSSON H, LAURELL F, CHENG L K. Periodic poling of RbTiOPO₄ for quasi-phase matched blue light generation[J]. Applied Physics Letters, 1999, 74(11): 1519-1521.
[10] ZHOU H T, HE X L, WU W Y, et al. Hydrothermal growth of KTiOPO₄ crystal for electro-optical application[J]. Light: Science & Applications, 2023, 12: 23.
[11] ROTH M, ANGERT N, TSEITLIN M, et al. Ferroelectric phase transition temperatures of self-flux-grown RbTiOPO₄ crystals[J]. Optical Materials, 2004, 26(4): 465-470.
[12] ROTH M, TSEITLIN M, ANGERT N. Composition-dependent electro-optic and nonlinear optical properties of KTP-family crystals[J]. Optical Materials, 2006, 28(1/2): 71-76.
[13] TSEITLIN M, MOJAEV E, ROTH M. Growth of high resistivity RbTiOPO₄ crystals[J]. Journal of Crystal Growth, 2008, 310(7/8/9): 1929-1933.
[14] ROTH M, TSEITLIN M. Growth of large size high optical quality KTP-type crystals[J]. Journal of Crystal Growth, 2010, 312(8): 1059-1064.
[15] DELARUE P, LECOMTE C, JANNIN M, et al. Evolution towards centrosymmetry of the nonlinear-optical material RbTiOPO₄ in the temperature range 293-973 K: Alkaline displacements and titanyl deformations[J]. Physical Review B, 1998, 58(9): 5287-5295.
[16] BALITSKI D. LBO and RTP crystal growth improvement leading to large and optically perfect material[C]//20^th International Conference on Crystal Growth and Epitaxy, 2023.
[17] 刘文, VORONKOVA V I, YANOVSKII V K. Cs⁺∶RbTiOPO₄晶体的铁电相变和电导特性[J]. 人工晶体学报, 2002, 31(4): 417-419.
LIU W, VORONKOVA V I, YANOVSKII V K. Ferroelectric phase transition and electrical conductivity of the Cs⁺∶RbTiOPO₄ crystals[J]. Journal of Synthetic Crystals, 2002, 31(4): 417-419 (in Chinese).
[18] CHENG L K, CHENG L T, GALPERIN J, et al. Crystal growth and characterization of KTiOPO₄ isomorphs from the self-fluxes[J]. Journal of Crystal Growth, 1994, 137(1/2): 107-115.