Bandwidth enhancement of MIR emission in Yb3+/Er3+/Dy3+ triply doped fluoro-tellurite glass. (8th February 2017)

• Record Type: Journal Article
• Authors: Balaji, Sathravada; Allu, Amarnath R; Biswas, Kaushik; Gupta, Gaurav; Ghosh, Debarati; Annapurna, Kalyandurg
• Is Part Of: Laser physics letters. Volume 14:Number 3(2017:Mar.)
• Publication Date: 2017-02-08
• Subjects: broadband -- Yb3+ -- tellurite glass -- MIR emission -- Er3+ -- Dy3+; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa5c1b
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: Enhanced bandwidth of MIR emission from Yb 3+ /Er 3+ /Dy 3+ triply doped low phonon oxide glass system has been reported in this work. With considerable gain cross-section, the MIR emission bandwidth can be stretched from ~2600 to 3100 nm (~500 nm) which is practically not possible to obtain from Er 3+ or Dy 3+ ions singly doped systems. Co-doping of Dy 3+ ions not only quenches the unfavourable visible up-converted emissions from Er 3+ ions but also mitigates the prominent ~1.5 µ m emission. A broad MIR emission on superimposition of Er 3+ ~2.76 µ m and Dy 3+ ~2.95 µ m emissions was obtained owing to the efficient energy transfer (ET) Yb 3+ → Er 3+ → Dy 3+ upon ~980 nm excitation. The present glasses can be fiberized to develop compact and tunable MIR solid state fiber laser sources.