Imaging Science and Photochemistry ›› 1998, Vol. 16 ›› Issue (2): 127-131.DOI: 10.7517/j.issn.1674-0475.1998.02.127

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UPCONVERSION FLUORESCENCE IN ZnWO4:Er3+ CRYSTAL BY LD EXCITED

ZANG Jingcun1, LIU Yanhang1, CHEN Xiaobo2, HAO Zhao2, WANG Weiqin3, YIE Jianping3   

  1. 1. Department of Chemical and Environmental Engineering, Beijing Polytechnic University, Beijing 100022, P. R. China;
    2. Department of Physics Nankai University, Tianjin 300071, P. R. China;
    3. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:1997-07-08 Revised:1997-11-18 Online:1998-05-20 Published:1998-05-20

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Abstract: Single crystals of ZnWO4: Er3+(Er:0.02 mol) have been grown by the Czochralski method and their absorption and excitation spectra are measured. It is observed that the up conversion luminescence phenomenon in the crystals by laser diode(LD)excited with 500 mW power at 966 nm wavelength. The most strong fluorescence intensity are occurred at 547 and 558 nm wavelength. Studies on emission spectra shown that the excitation process of upconversion luminescence relatives to the stepwise two photon absorption.

Key words: single crystal, up-conversion luminescence, laser diode

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