Abstract

We report on the linear and nonlinear optical properties of the novel organic crystal 4-N, N-dimethylamino-4-N-methyl-stilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS). The principal refractive indices n1, n2, and n3 have been determined by a direct measurement of the group index dispersion over a broad wavelength range from 0.6to1.6μm. The linear absorption coefficients for light polarized along the dielectric axes have been measured in the transparency range from 600to2000nm. DSTMS crystals show a large birefringence of Δn=0.5 and low absorption α<0.7cm1 in the telecommunication wavelength range at 1.55μm. Furthermore, the nonlinear optical tensor elements d111, d122, and d212 have been determined by the Maker-fringe technique at the fundamental wavelength of 1.9μm. DSTMS crystals exhibit a very large nonlinear activity with a nonlinear optical coefficient d111=214±20pmV. Phase-matching curves determined from our optical data showed that parametric oscillation can be achieved in the wavelength range from 1to2.2μm with effective nonlinear optical coefficients larger than 25pmV.

© 2007 Optical Society of America

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