emission performance in Ho3+ doped fluorophosphate glasses sensitized with Er3+ and Tm3+ under 800 nm excitation

✍ Scribed by Meng Wang; Lixia Yi; Guonian Wang; Lili Hu; Junjie Zhang

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 959 KB
• Volume: 149
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2009.04.021

✦ Synopsis

The spectroscopic properties and energy transfer mechanisms in Ho 3+ doped fluorophosphate glasses sensitized by Er 3+ and Tm 3+ at the 2 µm region are investigated. The absorption spectra and fluorescence spectra of the Tm-Ho doubly-doped glass system and Er-Tm-Ho triply-doped glass system are measured. According to the absorption spectra, the Judd-Ofelt parameters and spontaneous transition probability are calculated and compared with those of other glass hosts. From the fluorescence spectra, the fluorescence intensity of Er-Tm-Ho glass system at 2.0 µm is 0.95 and larger than that of the Tm-Ho glass system, which is 0.69. Meanwhile, the 2.0 µm to 1.8 µm and 2.0 µm to 1.53 µm peak intensity ratios in the Er-Tm-Ho glass system are 8.63 and 22.79, respectively, suggesting sufficient energy transfer between Er 3+ , Tm 3+ and Ho 3+ ions. In addition, the pumping schemes and energy transfer mechanisms of Tm-Ho doubly-doped and Er-Tm-Ho triply-doped glasses are discussed. The study indicates that the Er-Tm-Ho triply-doped glass system is a significant sensitized way pumped at 800 nm in fluorophosphate glasses for 2 µm applications.