New nonlinear optical LiKB4O7 single crystals: Dispersion of refractive indices

• Published in: Optical materials Vol. 29; no. 11; pp. 1501 - 1504
• Main Authors: Adamiv, V.T., Burak, Ya.V., Romanyuk, M.M., Romanyuk, G.M., Teslyuk, I.M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2007; Elsevier Science
• Subjects: Borate single crystal; Exact sciences and technology; Frequency conversion ; harmonic generation, including high-order harmonic generation; Fundamental areas of phenomenology (including applications); Nonlinear optical crystals; Nonlinear optical materials; Nonlinear optics; Optical materials; Optics; Physics; Refractive indices; Nonlinear optical materials; 42.70.−a; Refractive indices; 01.30.Cc; 42.70.Mp; Borate single crystal; 42.25.Lc; Crystal growth; Second harmonic generation; Non linear material; Optical phase matching; Refractive index; YAG laser; Potassium Borates; Monocrystals; Nonlinear optical materials; Borate single crystal; Refractive indices; Solid state lasers; Ambient temperature; Optical properties; Visible radiation; Optical materials; Optical frequency conversion; Quaternary compounds; Nonlinear optics; 01.30.Cc; 42.25.Lc; 42.70.-a; 42.70.Mp; Neodymium lasers
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2006.07.018

The dispersion of refractive indices has been studied for LiKB4O7 single crystals growth with Czochralsky technique. In spectral range 420–675nm the refractive indices na>nc>nb and dependencies ni(λ) can be described by monomial Zellmeier formulas. At the room temperature (293K) nb=1.521, nc=1.554, na=1.562 at λ=1064nm, and nb=1.542, nc=1.582, na=1.593 at λ=532nm. Estimation of the phase matching conditions for second-harmonic generation (SHG) for radiation of the YAG:Nd laser (λ=1064nm) has been performed. We show that SHG in LiKB4O7 crystal can be realized by the phase matching of type I. The bisector of acute angle between optical axes (ϕ≈56°) coincides with crystallographic axis [010].