Shandong University

Jiyang Wang

Huaijin Zhang

Haohai Yu

Dazhi Lu

Xiaobo Hu

Yuzhou Wang

Shaojun Zhang

Minhua Jiang

Xin Yin

Jinheng Du

An effective nonlinear optical coefficient optimization method for langasite group solid solution crystals is disclosed. The langasite group crystal ABCDOmainly includes langanite (LGN) crystal, langatate (LGT) crystal and langasite (LGS) crystal. The solid solution crystals are formed by adjusting a component proportion of langasite group crystals with the same structure, so that different ions mix and occupy sites in a polyhedral group, and a polyhedral lattice structure, distortion degree, refractive index and refractive dispersion of the solid solution crystal are changed. The reduction of the phase matching angle and the improvement of the nonlinear optical coefficient are realized, and the effective nonlinear optical coefficient is finally optimized.

Effective nonlinear optical coefficient optimization method for langasite group solid solution crystals

A kind of all-solid-state high-power slab laser based on phonon band-edge emission, which is comprised of a pumping source, a focusing system, a resonant cavity and a self-frequency-doubling crystal; the said self-frequency-doubling crystal is a Yb-doped RECOB crystal cut into slab shape along the direction of the crystal's maximum effective nonlinear coefficient of its non-principal plane; by changing the cutting direction of the crystal, the phase matching of different wavelengths is realized, thus realizing laser output at the band of 560-600 nm; the said pumping source is a diode laser matrix with a wavelength of 880 nm-980 nm; the input cavity mirror and the output cavity mirror are coated with films to obtain laser output at the band of 560-600 nm; the two large faces of the said self-frequency-doubling crystal is cooled by heat sink and located between the input cavity mirror and the output cavity mirror.

All-solid-state high-power slab laser based on phonon band edge emission

This invention is a kind of electrooptic Q-switch element made of a single crystal and belongs to the application of crystal in electrooptic technology field. The invention consists of electrooptic Q-switch which is made of LaGaSiOor Nd:LaGaSiOor the other related crystal materials such as LaGaAlSiO, SrGaGeSiO, NaCaGeO, CaGaGeO, LaGaNbOand LaGaTaOwith the common shape or a specific shape containing Brewster angle as shown in figure. This kind of electrooptic Q-switch can be used in YAG laser and other laser. It overcomes the shortages of the commercial Q-switches, such as the high, un-adjustable, low stable half-wave voltage and great half-wave voltage variation with temperature. The advantage of this kind of electrooptic Q-switch is its low, adjustable, high stable half-wave voltage.

Electrooptic Q-switch element made of crystal

Growing community of inventors

Jinan, China

Jiyang Wang