Enhanced 2.0 μm emission in codoped transparent oxyfluoride glass ceramics containing nano-crystals

✍ Scribed by Jiajia Pan; Rongrong Xu; Meng Wang; Guojun Gao; Jimeng Chen; Lili Hu; Junjie Zhang

• Book ID: 104093674
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 815 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2009.09.047

✦ Synopsis

A. Tm 3+ /Ho 3+ codoped glasses D. 2.0 µm emission a b s t r a c t Oxyfluoride glasses, 30.9SiO 2 -15.5AlO 1.5 -30.9PbF 2 -22.7CdF 2 -1.5TmF 3 -xHoF 3 (x = 0.1, 1, 1.5) (mol %), were prepared by traditional melt-quenching method. By appropriate heat treatment of the precursor glasses as described above, transparent glass ceramics were obtained with β-PbF 2 nano-crystals embedded in glassy matrix as confirmed by X-ray diffraction analysis. Optical absorption and 2.0 µm emission properties of the precursor glass and glass ceramic samples have been studied. Rare-earth ions were confirmed to enter into nano-crystals, by absorption spectra. The emission intensity in 2.0 µm region increased several times after crystallization, due to shortened distance between codopants and low phonon energy of the β-PbF 2 nano-crystals. Of the investigated samples, glass ceramic sample containing 1.5 mol% TmF 3 and 0.1 mol% HoF 3 has the broadest and the most efficient emission in 2.0 µm region. The Tm 3+ /Ho 3+ codoped oxyfluoride glass ceramics show potential applications in 2.0 µm laser devices.