This article is cited in 5 papers

Some features of second-harmonic generation in a lithium metaniobate crystal

R. B. Andreev, V. D. Volosov, A. G. Kalintsev


Abstract: An investigation was made of the temperature dependences of the phase-matching angle, the angular width of the phase-matching curve, the dispersion of the phase-matching direction, and the temperature derivative of this direction in the generation of the second harmonic of the neodymium laser radiation in a crystal of LiNbO₃. A calculation was made of the parameters K_α and B_α, which were the first and second terms in the expansion of the phase detuning in terms of the angle of deviation from the phase-matching direction. The validity of the linear approximation in this expansion was considered for different values of the phase-matching angle. The dispersion of the phase-matching direction increased ten-fold and the temperature derivative of the phase-matching direction rose twenty-fold on approach to the 90° phase matching. The second harmonic of the neodymium laser radiation was generated with an efficiency of ~40%. The induced inhomogeneity of the refractive index of lithium metaniobate was not observed.

UDC: 621.378.325

PACS: 42.65.Ky, 42.55.Rz, 42.60.Lh, 42.60.Jf, 42.70.Mp

Received: 28.12.1970
Revised: 12.10.1971

 English version: Soviet Journal of Quantum Electronics, 1973, 2:6, 529–532