Tm~(3+) and Nd~(3+) singly doped LiYF_4 single crystals with 3-5 μm mid-infrared luminescence

• 作 者: 李珊珊 汪沛渊 夏海平 彭江涛 唐磊 张约品 江浩川
• 机 构: Key Laboratory of Photoelectronic Materials,Ningbo University,Ningbo Institute of Materials Technolo
• 出 处: Chinese Optics Letters
• 发表日期: 2014年02期
• 关键词: Tm and Nd attributed resultant emissions luminescence doping transitions transmi

Mid-infrared(MIR) emissions of 2.4 and 3.5 μm from Tm3+:LiYF4 single crystals attributed to3H4 →3H5 and3H5 →3F4 transitions as well as MIR emissions of 4.2,4.3,and 4.5 μm from Nd3+:LiYF4 lasers attributed to4I15/2 →4I13/2,4I13/2 →4I11/2,and4I11/2 →4I9/2 transitions,respectively,are observed.LiYF4 single crystals possess high transmittance of over 85% in the 2.5-6 μm range.The large emission crosssections of Tm-doped crystals at 2.4 μm(1.9×10-20cm2) and Nd-doped crystals at 4.2 μm(0.84×10-20 cm2) as well as the high rare-earth doping concentrations,excellent optical transmission,and chemicalphysical properties of the resultant samples indicate that Nd3+and Tm3+singly doped crystals may be promising materials for application in MIR lasers.

Mid-infrared (MIR) emissions of 2.4 and 3.5 μm from Tm3 +: LiYF4 single crystals attributed to3H4 → 3H5 and3H5 → 3F4 transitions as well as MIR emissions of 4.2, 4.3 and 4.5 μm from Nd3 +: LiYF4 lasers attributed to 4I15 / 2 → 4I13 / 2,4I13 / 2 → 4I11 / 2, and4I11 / 2 → 4I9 / 2 transitions, respectively, are observed. LiYF4 single crystals possess high transmittance of over 85% in the 2.5-6 μm range. The large emission crosssections of Tm- doped crystals at 2.4 μm (1.9 × 10-20 cm2) and Nd-doped crystals at 4.2 μm (0.84 × 10-20 cm2) as well as the high rare-earth doping concentrations, excellent optical transmission, and chemical physics properties of the resultant samples indicates that Nd3 + and Tm3 + singly doped crystals may be promising materials for application in MIR lasers.