We present a simple laser architecture to obtain continuous-wave (CW) true yellow light sources at the 579 nm. A 806 nm diode-pumped a Nd:YLF crystal emitting at 1047 nm with intracavity Raman shifting by SrWO 4 crystal at 1158 nm. Intracavity frequency-doubling at 1158 nm was then realized in a LiB3O5 (LBO) crystal to reach the yellow-orange radiation. To realize CW yellow radiation, high-Q resonator is applied to resonate two optical fields (i.e. the fundamental, and the first Stokes) by design high performance mirrors and partly sharing linear resonator. The stimulated Raman scattering (SRS) resonator losses is effectively reduced. We obtained a CW output power up to 889 mW at 579 nm with an incident pump power of 15.3 W at 806 nm, corresponding to an optical conversion efficiency of 5.8% with respect to the incident pump power
A series of LiNbO 3 crystals tri-doped with Mg 2+ , Yb 3+ , and Ho 3+ are grown by the conventional Czochraski technique. The concentrations of Mg 2+ , Yb 3+ , and Ho 3+ ions in Mg:Yb:Ho:LiNbO 3 crystals are measured by using an inductively coupled plasma atomic emission spectrometry. The x-ray diffraction is proposed to determine the lattice constant and analyze the internal structure of the crystal. The light-induced scattering of Mg:Yb:Ho:LiNbO 3 crystal is quantitatively described via the threshold effect of incident exposure energy flux. The exposure energy (E r ) is calculated to discuss the optical damage resistance ability. The exposure energy of Mg(7 mol):Yb:Ho:LiNbO 3 crystal is 709.17 J/cm 2 , approximately 425 times higher than that of the Mg(1 mol):Yb:Ho:LiNbO 3 crystal in magnitude. The blue, red, and very intense green bands of Mg:Yb:Ho:LiNbO 3 crystal are observed under the 980-nm laser excitation to evaluate the up-conversion emission properties. The dependence of the emission intensity on pumping power indicates that the up-conversion emission is a two-photon process. The up-conversion emission mechanism is discussed in detail. This study indicates that Mg:Yb:Ho:LiNbO 3 crystal can be applied to the fabrication of new multifunctional photoluminescence devices.
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