rare-earth ion-doped nonlinear crystal 掺稀土离子非线性晶体 rare-earth laser 稀土元素激光器 rare-earth-doped calcium fluoride 掺稀土氟化钙 ..
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rare-earth ion-doped nonlinear crystal 掺稀土离子非线性晶体 rare-earth laser 稀土元素激光器 rare-earth-doped calcium fluoride 掺稀土氟化钙 ..
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