TIME-RESOLVED SPECTROSCOPY OF NI2+ DOPED FLUOROCHLOROZIRCONATE GLASSES

Optical absorption, time resolved luminescence and fluorescence decay measurements of Ni2+-doped fluoroclorozirconate glasses are reported. Time resolved luminescence measurements were taken exciting the sample s at different wavelengths. The position of the orange emission band ( T-1(2g)(D) --> (3)A(2g)(F)) moves to the blue when the excitation is c hanged to higher energies. For a fixed excitation wavelength, the emis sion moves also to the blue when the time of measurement after the las er pulse increases. The fluorescence decays are non-exponential and de pend of the detection wavelength. They are slower for the shorter dete ction wavelengths. The results show a distribution of Ni2+ sites with different 'crystal field' environments.