LINEAR AND NONLINEAR-OPTICAL PROPERTIES OF LITHIUM TETRABORATE

The refractive indices of Li2B4O7 crystal were measured for both ordin ary and extraordinary beams in the range of 184.887 nm-2325.42 nm, and the Sellmeier equations were derived from these results. Li2B4O7 crys tal has a suitable phase-matching condition in the ultraviolet range a nd the shortest SHG output wavelength of 243.8 nm. Considering also it s short-wavelength cutoff and low scattering, Li2B4O7 crystal is an ex cellent nonlinear optical crystal for an ultraviolet solid-state laser . (C) 1998 Elsevier Science Ltd. All rights reserved.