title: Tunable mid-infrared luminescence from Er3+ -doped germanate glass.
abstract: Er(3+) -doped germanate glasses with superior thermal stability were prepared. Judd-Ofelt intensity parameters and important spectroscopic properties were discussed in detail. Upon 800 nm and 980 nm LD pumping, 2.7 µm fluorescence characteristics were investigated and it was found that the effective 2.7 µm emission bandwidth can reach to 101.79 nm in prepared glasses. The tunability of the 2.7 µm emission band can be realized by adjusting the Er(3+) content. Moreover, a high-emission cross-section (11.09 × 10(-21) cm(2) ), large gain bandwidth (772.30 × 10(-28) cm(3) ) and gain coefficient (6.72 cm(-1) ) were obtained in the prepared sample. Hence, Er(3+) -doped germanate glass might be a promising mid-infrared material for tunable amplifiers or lasers.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Bingpeng
authors.initials: B
authors.lastname: Li
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wei
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Institute of Optoelectronic Technology, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Xufeng
authors.initials: X
authors.lastname: Jing
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Fangze
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Fengchao
authors.initials: F
authors.lastname: Wang
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Muzhi
authors.initials: M
authors.lastname: Cai
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, People's Republic of China.
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu
mesh_terms: D004871:Erbium / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013696:Temperature
chemical_list: D049408:Luminescent Agents; D005857:Germanium; D004871:Erbium
keywords: Er3+-doped germanate glass; gain bandwidth; mid-infrared; tunable