| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Photodarkening-Induced Absorption and Fluorescence Changes in Yb Fibers |
| CHEN Gui, XIE Lu, WANG Yi-Bo, ZHAO Nan, LI Hai-Qing, JIANG Zuo-Wen, PENG Jing-Gang, YANG Lü-Yun, DAI Neng-Li, LI Jin-Yan** |
Wuhan National Laboratory for Optoeletronics, Huazhong University of Science and Technology, Wuhan 430074
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| Cite this article: |
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CHEN Gui, XIE Lu, WANG Yi-Bo et al 2013 Chin. Phys. Lett. 30 104208 |
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Abstract We study the photodarkening effect in a double clad ytterbium-doped silica fiber fabricated by modified chemical vapor deposition and solution doping. A common measurement technology for photodarkening is used to study the photodarkening-induced absorption spectra. We present a fast and simple method to observe the PD effect by measurement of the fluorescence spectra. The method proposed here can be used to observe the influence for a short time, and thus reduces the requirements of system stability and heat management. It is obtained that under the condition of 45.5% Yb ion inversion level, photodarkening-induced excessive loss at an equilibrium state is above 4.5 dB/m and florescence intensity degradation is above 10% after 500 min pumping at 1041 nm for the home-made normal Yb/Al co-doped silica fiber.
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Received: 11 July 2013
Published: 21 November 2013
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| PACS: |
42.81.Cn
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(Fiber testing and measurement of fiber parameters)
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42.55.Wd
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(Fiber lasers)
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61.80.Ba
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(Ultraviolet, visible, and infrared radiation effects (including laser radiation))
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42.60.Lh
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(Efficiency, stability, gain, and other operational parameters)
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