含Ho3+的GeO2-B2O3-BaO-Na2O-Al2O3锗酸盐玻璃的光谱与增益特性
함Ho3+적GeO2-B2O3-BaO-Na2O-Al2O3타산염파리적광보여증익특성
The optical and gain properties of GeO2-B2O3-BaO-Na2O-Al2O3 gemanate glasses containing Ho3+ ion
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