The luminescent quantum efficiency of the laser emitting level ( 4 F 3/2 ) of Nd 3+ ions in lithium niobate (LiNbO 3 ) is obtained experimentally by using a method based on the simultaneous and multiwavelength measurement of photoacoustic and luminescent signals after modulated continuous laser excitation. The experimental results give a high luminescence quantum efficiency, Φ = 0.98 (ΔΦ = 0.08), which is in agreement with the highest of the values reported in the literature from Judd-Ofelt calculations.
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Muñoz et al. (1998) studied this question.
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