Abstract

Phase matching conditions and second and third order nonlinear optical coefficients of Sn2P2S6 crystals are reported. The coefficients for second harmonic generation (SHG) are given at λ = 1542 nm and 1907 nm at room temperature. The largest coefficients at these wavelengths are d111 = 17±1.5pm/V and d111 = 12±1.5pm/V, respectively. The third-order subsceptibilities �?(3) 1111 = (17 ± 6) · 10�??20m2/V2 and �?(3) 2222 = (9 ± 3) · 10�??20m2/V2 were determined at λ = 1907 nm. All measurements were performed by the Maker-Fringe technique. Based on the recently determined refractive indices, we analyze the phase-matching conditions for second harmonic generation, sum- and difference-frequency generation and parametric oscillation at room temperature. Phase-matching curves as a function of wavelength and propagation direction are given. Experimental phase-matched type I SHG at 1907 nm has been demonstrated. The results agree very well with the calculations. It is shown that phase-matched optical parametrical oscillation is possible in the whole transparency range up to 8 µm with an effective nonlinear coefficient deff �?? 4pm/V.

© 2005 Optical Society of America

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Appl. Phys. Lett. (1)

R. C. Miller, �??Optical 2nd harmonic generation in piezoelectric crystals,�?? Appl. Phys. Lett. 5, 17�??9 (1964).
[CrossRef]

Ferroelectrics (1)

A. Anema, A. Grabar, and T. Rasing, �??The nonlinear optical properties of Sn2P2S6,�?? Ferroelectrics 183, 181�??3 (1996).

IEEE Journal of Quantum Electronics (1)

D. A. Roberts, �??Simplified characterization of uniaxial and biaxial nonlinear optical crystals: a plea for standardization of nomenclature and conventions,�?? IEEE Journal of Quantum Electronics 28, 2057�??74 (1992).
[CrossRef]

J. Appl. Phys. (2)

J. Jerphagnon and S. K. Kurtz, �??Maker fringes: a detailed comparison of theory and experiment for isotropic and uniaxial crystals,�?? J. Appl. Phys. 41, 1667�??81 (1970).
[CrossRef]

J. Q. Yao and T. S. Fahlen, �??Calculations of optimum phase match parameters for the biaxial crystal KTiOPO4,�?? J. Appl. Phys. 55, 65�??8 (1984).
[CrossRef]

J. Opt. Soc. Am. B (4)

J. Phys. B (2)

F. Brehat and B. Wyncke, �??Calculation of double-refraction walk-off angle along the phase-matching directions in non-linear biaxial crystals,�?? J. Phys. B 22, 1891�??8 (1989).
[CrossRef]

B. Wyncke and F. Brehat, �??Calculation of the effective second-order non-linear coefficients along the phase matching directions in acentric orthorhombic biaxial crystals,�?? J. Phys. B 22, 363�??76 (1989).
[CrossRef]

J. Phys. C (1)

M. Zgonik, M. Copic, and H. Arend, �??Optical second harmonic generation in ferro- and para-electric phases of PbHPO4,�?? J. Phys. C 20, L565�??569 (1987).
[CrossRef]

Opt. Commun. (1)

D. Haertle, G. Caimi, A. Haldi, G. Montemezzani, P. Günter, A. A. Grabar, I. M. Stoika, and Y. M. Vysochanskii, �??Electro-optical properties of Sn2P2S6,�?? Opt. Commun. 215, 333�??43 (2003).
[CrossRef]

Opt. Express (1)

Opt. Mat. (1)

R. S. Klein, G. E. Kugel, A. Maillard, K. Polgar, and A. Peter, �??Absolute non-linear optical coefficients of LiNbO3 for near stoichiometric crystal compositions,�?? Opt. Mat. 22, 171�??4 (2003).
[CrossRef]

Phys. Rev. B (1)

C. Bosshard, U. Gubler, P. Kaatz, W. Mazerant, and U. Meier, �??Non-phase-matched optical third-harmonic generation in noncentrosymmetric media: Cascaded second-order contributions for the calibration of third-order nonlinearities,�?? Phys. Rev. B 61, 10, 688�??701 (2000).

Soviet Physics Solid State (1)

M. I. Gurzan, A. P. Buturlakin, V. S. Gerasimenko, N. F. Korde, and V. Y. Slivka, �??Optical properties of Sn2P2S6 crystals,�?? Soviet Physics Solid State 19, 1794�??5 (1977).

Zeitschrift fuer Naturforschung (1)

G. Dittmar and H. Schäfer, �??Die Struktur des Di-Zinn-Hexathiohypo-diphosphats Sn2P2S6,�?? Zeitschrift fuer Naturforschung 29B, 312�??7 (1974).

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