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报道了用三个方向相互垂直的非偏振吸收光谱测量计算Ｊｕｄｄ－Ｏｆｅｌｔ参数从而算出双轴晶体Ｎｄ３＋ＫＧｄ（ＷＯ４）２的荧光寿命、荧光分支比和发射截面的方法。得到的荧光寿命为１１９μｓ，平均发射截面为２．３×１０－１９ｃｍ２。
A method for calculating the fluorescence lifetime, fluorescence branching ratio and emission cross section of biaxial crystal Nd3 + KGd (WO4) 2 by calculating the Judd-Ofelt parameter by measuring the unpolarized absorption spectra perpendicular to each other in three directions is reported. The resulting fluorescence lifetime was 119 μs and the average emission cross section was 2.3 × 10-19 cm 2.