Desighn and Development of Infrared-to-Visible Upconversion Rare Earth Laser

红外-可见光上转换稀土激光器的设计与研制

• 批准号: 04453069
• 负责人: SOGA Naohiro
• 金额: $ 5.12万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04453069/
• 关键词: Rare earth glass; upconversion; Frequency conversion laser; Energy transfer; Excited state absorption; Phonon sideband; Mossbauer effect; Ligand field; フオノンサイドバンド; Rare earth glass; upconversion; Frequency conversion laser; Energy transfer; Excited state absorption; Phonon sideband; Mossbauer effect; Ligand field; フオノンサイドバンド

We have obtained several research results listed below.It was possible for the first time to ovserve efficient visible upconverion in Er^<3+> doped heavy metal oxide glasses by 800nm radiation of infrared AlGaAs laser diode.The upconversion efficiency was found to vary with the phonon energy coupled with the rare earth ions in the host glass, which was observed in the phonon sideband spectra.The Tm^<3+> doped glasses exhibit uv and blue upconversion by 650nm pumping of DCM-dye laser. The main mechanism of Tm^<3+> upconversions was excited state absorption from two kinds of excited levels.Teh controlling factors of Judd-Ofelt intensity parameters were made clear for Er^<3+> and Nd^<3+> ions in oxide and several fluoride glasses. Among three OMEGA_t parameters, the OMEGA_6 showed a strong correlation between the ^<151>Eu isomer shift in Mossbauer effect measurement for the glass with the same composition. These phenomena could be well explained by the shielding effect on the 5dorbital by the 6s electron, the density of which is increased by the covalency effect of rare earth and ligand bond.

We have obtained several research results listed below.It was possible for the first time to ovserve efficient visible upconverion in Er^<3+> doped heavy metal oxide glasses by 800nm radiation of infrared AlGaAs laser diode.The upconversion efficiency was found to vary with the phonon energy coupled with the rare earth ions in the host glass, which was observed in the phonon sideband spectra.The TM^<3+>掺杂玻璃表现出紫外线和蓝色的向上转换DCM-DYE激光器。 TM^<3+>上转换的主要机制是从两种激发级别的激发态吸收。对氧化物和几种氟化物玻璃中的ER^<3+>和ND^<3+>离子的Teh控制因子的控制因素清楚地清楚了。在三个Omega_T参数中，Omega_6在Mossbauer效应测量中的 ^<151> EU异构体移动之间显示出很强的相关性，具有相同的组成。这些现象可以通过6S电子对5Dorbital的屏蔽效应来很好地解释，其密度通过稀土和配体键的共价效应而增加。