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Fibers, Volume 1, Issue 2 (September 2013), Pages 11-35

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Research

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Open AccessArticle Er3+/Ho3+-Codoped Fluorotellurite Glasses for 2.7 µm Fiber Laser Materials
Fibers 2013, 1(2), 11-20; doi:10.3390/fib1020011
Received: 10 July 2013 / Revised: 6 August 2013 / Accepted: 12 August 2013 / Published: 16 August 2013
Cited by 7 | PDF Full-text (697 KB) | HTML Full-text | XML Full-text
Abstract
This work reports the enhanced emission at 2.7 µm in Er3+/Ho3+-codoped fluorotellurite glass upon a conventional 980 nm laser diode. The significantly reduced green upconversion and 1.5 µm emission intensity in Er3+/Ho3+-codoped samples are observed.
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This work reports the enhanced emission at 2.7 µm in Er3+/Ho3+-codoped fluorotellurite glass upon a conventional 980 nm laser diode. The significantly reduced green upconversion and 1.5 µm emission intensity in Er3+/Ho3+-codoped samples are observed. The results suggest that the Er3+: 4I13/2 state can be efficiently depopulated via energy transfer from Er3+ to Ho3+ and the detailed energy transfer mechanisms are discussed qualitatively. The energy transfer efficiency from Er3+: 4I13/2 to Ho3+: 5I7 is calculated to be as high as 67.33%. The calculated emission cross-section in Er3+/Ho3+-codoped fluorotellurite glass is 1.82 × 1020 cm2. This suggests that Er3+/Ho3+-codoped fluorotellurite glass is a potential material for 2.7 µm fiber laser. Full article
(This article belongs to the Special Issue Advances on Optical Fibers)

Review

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Open AccessReview Application of Electro-Technologies in Processing of Flax Fiber
Fibers 2013, 1(2), 21-35; doi:10.3390/fib1020021
Received: 23 July 2013 / Revised: 1 August 2013 / Accepted: 19 August 2013 / Published: 30 August 2013
Cited by 2 | PDF Full-text (477 KB) | HTML Full-text | XML Full-text
Abstract
Flax fibers used for various applications are obtained from flax stems. Retting followed by drying and mechanical separation leads to the production of fibers. This review article discusses the application of electro-technologies in the production of bast fibers from the flax stem. In
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Flax fibers used for various applications are obtained from flax stems. Retting followed by drying and mechanical separation leads to the production of fibers. This review article discusses the application of electro-technologies in the production of bast fibers from the flax stem. In these technologies, flax stems harvested from the field are subjected to microwave assisted retting, followed by electro–osmotic dewatering which reduces the water content of the stems. Dewatered stems are transferred to a microwave chamber for further drying, thus retted stems are obtained for further processing. Full article

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