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The spectral parameters of Nd3+ ions in Nd3+:Klu(WO4)2 crystal were calculated based on Judd-Ofelt theory and obtained as follows: for the oscillator strengths Ωλ: Ω2 = 7.5029×10-20 cm2, Ω4 = 7.1837×10-20 cm2 and Ω6 = 3.1189×10-20 cm2; the