Growth and optical property of ZnWO4: Er3+ crystal

Good quality crystals ZnWO4 activated with Er3+ have been grown by means of Czochralski method and characterized using optical spectroscopy techniques. XRD, absorption spectra, fluorescence spectrum are presented and the Judd–Ofelt intensity parameters Ω2, Ω4, and Ω6 are obtained to be 6.76×10–20, 0.37×10–20, and 0.50×10–20 cm2, respectively. Along crystallographic axes, refractive indices are presented. The fluorescence decay time of the 4I13/2 level has also been investigated and shows an exponential behavior with a lifetime value of 5.52 ms. The crystal is potentially used for green and infrared eye-safe lasers.