Broadband emission in co-doped glass

✍ Scribed by Kefeng Li; Guonian Wang; Junjie Zhang; Lili Hu

• Book ID: 104093939
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 542 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2010.07.030

✦ Synopsis

In this work, we report the infrared emission properties of Tm 3+ /Ho 3+ co-doped TeO 2 -WO 3 -La 2 O 3 (TWL) glass under 808 nm laser excitation. A broad and flat emission from 1600 to 2200 nm corresponding to the Tm 3+ ( 3 F 4 → 3 H 6 ) and Ho 3+ ( 5 I 7 → 5 I 8 ) emissions is observed. The full width at half maximum (FWHM) of this broadband increases up to a value of ∼370 nm with an optimal [Tm 3+

]/[Ho 3+ ] concentration ratio.

The energy transfer processes of Tm 3+

↔ Ho 3+ are analyzed and the results show that energy transfer between Tm 3+ and Ho 3+ plays an important role in the luminescence mechanism. The OH -influence on the broadband emission is also discussed. These results indicate that Tm 3+ -Ho 3+ co-doped TWL glass could be a promising material for widely tunable laser or broadband amplifier applications.