We report on frequency doubling of cw ring-dye-laser radiation in lithium iodate crystals (LiIO3). The conversion coefficient and the matching angle were measured as a function of the fundamental wavelength in the range 586.3–624 nm. For Type I phasematching the matching angle θm=90° for noncritical matching was found at 586.3 nm. At this wavelength the conversion coefficient reaches the maximum value which was observed to be as high as 1.6×10−2 W−1 for a LiIO3 crystal of 1 cm length. From the dependence of the matching angle on the wavelength the refractive induces were determined for the ordinary as well as for the extraordinary ray in the wavelength range from 293 nm up to 355 nm. The influence of focussing on the conversion coefficient is discussed.
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Buesener, H., Renn, A., Brieger, M. et al. Frequency doubling of cw ring-dye-laser radiation in lithium iodate crystals. Appl. Phys. B 39, 77–81 (1986). https://doi.org/10.1007/BF00694801