Mid-infrared emission from Er3+ and energy transfer in Er3+-Yb3+ and Er3+-Nd3+ co-doped Ga2S3-GeS2-Sb2S3 glasses

✍ Scribed by Ichikawa, Manabu ;Ishikawa, Yoichi ;Wakasugi, Takashi ;Kadono, Kohei

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 417 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127179

✦ Synopsis

Abstract

The radiative and nonradiative transitions of the first three excited levels of Er^3+^ doped in Ga~2~S~3~–GeS~2~–Sb~2~S~3~ glass were investigated. Particularly, we focused on the ^4^I~9/2~ and ^4^I~11/2~ which are the initial and final levels of mid‐infrared emission around 4 µm. The effects of energy transfer from these levels to co‐doped rare‐earth ions, Yb^3+^ and Nd^3+^, were estimated. The population of the final level, ^4^I~11/2~, was efficiently quenched by the energy transfer to the Yb^3+^, ^2^F~5/2~ level. This leads to the population inversion between the initial and final levels. In the Nd^3+^‐co‐doped glass, on the contrary, the initial level, ^4^I~9/2~, was more rapidly quenched than the final level, ^4^I~11/2~, through the energy transfer to Nd^3+^, ^4^F~5/2~ + ^2^H~9/2~.