Improved second-harmonic generation by selective Yb ion doping in a new nonlinear optical crystal YCa4O(BO3)(3)
Abbreviated Journal Title
IEEE J. Quantum Electron.
frequency conversion; nonlinear optical materials; nonlinear optics; rare-earth-doped materials; second-harmonic generation; YCa4O(BO3)(3).; EFFICIENT 2ND-HARMONIC GENERATION; LASER-RADIATION; FREQUENCY; KTP; CA4GDO(BO3)(3); CONVERSION; LIB3O5; GROWTH; KDP; ND; Engineering, Electrical & Electronic; Optics; Physics, Applied
We describe experiments characterizing a new nonlinear optical crystal, YCa4O(BO3)(3) (YCOB). This crystal has a number of advantages over other commonly available nonlinear optical crystals, It has a higher nonlinear coefficient than KDP, can be fabricated to large sizes (similar to 3-in diameter, 8-in length), and has a high damage threshold. Moreover, this new nonlinear optical crystal is nonhygroscopic, has good optical quality and mechanical properties, allowing easy optical polishing. This crystal, YCa4O(BO3)(3), commonly termed YCOB, is one of a family of new nonlinear crystals, the oxyborates, that include RECa4O(BO3)(3) (RE=La3+, Lu3+, Y3+, Sm3+, Gd3+, Er3+, and Nd3+). In this paper, we also successfully demonstrate a technique for improving the nonlinear optical properties of this crystal. This technique, ion subsitution, has hetertofore had limited success with other crystal hosts. However, the inclusion of yttrium in YCOB provides the opportunity to exploit this technique. Yb3+, which has larger mass, but approximately the same atomic size as Y3+,can be substituted into the crystal structure without introducing stress and nonuniformities, A systematic investigation of the linear and nonlinear characteristics of several crystals doped with various levels of Yb demonstrate that selective substitution of Yb in YCa4O(BO3)(3) improves the second-harmonic conversion efficiency by increasing the optical nonlinearity.
Ieee Journal of Quantum Electronics
"Improved second-harmonic generation by selective Yb ion doping in a new nonlinear optical crystal YCa4O(BO3)(3)" (1999). Faculty Bibliography 1990s. 2682.