Emission properties of the Er3+: I-4(11/2) -> I-4(13/2) transition in Er3+- and Er3+/Tm3+-doped Ge-Ga-As-S glasses
SCIE
SCOPUS
- Title
- Emission properties of the Er3+: I-4(11/2) -> I-4(13/2) transition in Er3+- and Er3+/Tm3+-doped Ge-Ga-As-S glasses
- Authors
- Choi, YG; Kim, KH; Lee, BJ; Shin, YB; Kim, YS; Heo, J
- Date Issued
- 2000-12
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Ge-Ga-As-S glasses were investigated to develop efficient host materials for the Er3+:2.7 mum fiber lasers. Ge30Ga1As9S60 and Ge30Ga2As6S62 (all in at.%) glasses show good thermal stability and high rare-earth solubility up to 0.3 mol%. Mid-infrared emission with a peak wavelength of 2.76 mum and bandwidth of similar to 120 nm was observed in Er3+- and Er3+/Tm3+-doped Ge30Ga2As6S62 glasses. Codoping of Tm3+ significantly reduced the lifetime of the Er3+ : I-4(13/2) level due to the energy transfer of Er3+ : I-4(13/2) --> Tm3+ : F-3(4). Thus, the population inversion between the I-4(11/2) and I-4(13/2) levels in Er3+ became possible. In Er3+-doped glasses, the rate of cross-relaxation for the I-4(11/2) level was approximately ii times faster than that for the I-4(13/2) level. (C) 2000 Elsevier Science B.V. All rights reserved.
- Keywords
- 2.7 MU-M; ENERGY-TRANSFER; FLUORIDE GLASS; FLUOROZIRCONATE FIBER; RELAXATION PHENOMENA; UP-CONVERSION; LASER; ERBIUM; SPECTROSCOPY; MULTIPHONON
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19732
- DOI
- 10.1016/S0022-3093(00)00331-8
- ISSN
- 0022-3093
- Article Type
- Article
- Citation
- JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 278, no. 39816, page. 137 - 144, 2000-12
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