Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers
In this letter, pump power depreciation due to photodarkening effects in an ytterbium doped fiber (YDF) is investigated. Photodarkening is monitored by measuring the transmitted power at visible and pump wavelengths simultaneously, which renders direct quantitative measurement of pump power reductio...
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sg-ntu-dr.10356-1033882020-03-07T14:00:36Z Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers Li, Nanxi Yoo, Seongwoo Yu, Xia Jain, Deepak Sahu, Jayanta K. School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering In this letter, pump power depreciation due to photodarkening effects in an ytterbium doped fiber (YDF) is investigated. Photodarkening is monitored by measuring the transmitted power at visible and pump wavelengths simultaneously, which renders direct quantitative measurement of pump power reduction rather than excess background loss. Our observation of substantial reduction in the pump power and the shortened fluorescence decay time in the photodarkened fiber indicates that the photodarkening influences pump efficiency. The effect of the photodarkening in a device level is also investigated by observing the performance of the YDF amplifier implementing the same YDF. The pump power depreciation of this fiber amplifier is quantitatively investigated by numerical simulation. The results suggest that operating at a saturated regime helps to subdue the photodarkening, with explanation in terms of population inversion density provided. The level of power depreciation is calculated to be 15%-30%, which matches our experimental observation ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2014-05-09T08:25:07Z 2019-12-06T21:11:32Z 2014-05-09T08:25:07Z 2019-12-06T21:11:32Z 2014 2014 Journal Article Li, N., Yoo, S., Yu, X., Jain, D., & Sahu, J. K. (2014). Pump Power Depreciation by Photodarkening in Ytterbium-Doped Fibers and Amplifiers. IEEE Photonics Technology Letters, 26(2), 115-118. 1041-1135 https://hdl.handle.net/10356/103388 http://hdl.handle.net/10220/19303 10.1109/LPT.2013.2289965 en IEEE photonics technology letters © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/LPT.2013.2289965]. 4 p. application/pdf |
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DRNTU::Engineering::Electrical and electronic engineering Li, Nanxi Yoo, Seongwoo Yu, Xia Jain, Deepak Sahu, Jayanta K. Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
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In this letter, pump power depreciation due to photodarkening effects in an ytterbium doped fiber (YDF) is investigated. Photodarkening is monitored by measuring the transmitted power at visible and pump wavelengths simultaneously, which renders direct quantitative measurement of pump power reduction rather than excess background loss. Our observation of substantial reduction in the pump power and the shortened fluorescence decay time in the photodarkened fiber indicates that the photodarkening influences pump efficiency. The effect of the photodarkening in a device level is also investigated by observing the performance of the YDF amplifier implementing the same YDF. The pump power depreciation of this fiber amplifier is quantitatively investigated by numerical simulation. The results suggest that operating at a saturated regime helps to subdue the photodarkening, with explanation in terms of population inversion density provided. The level of power depreciation is calculated to be 15%-30%, which matches our experimental observation |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Li, Nanxi Yoo, Seongwoo Yu, Xia Jain, Deepak Sahu, Jayanta K. |
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Article |
author |
Li, Nanxi Yoo, Seongwoo Yu, Xia Jain, Deepak Sahu, Jayanta K. |
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Li, Nanxi |
title |
Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
title_short |
Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
title_full |
Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
title_fullStr |
Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
title_full_unstemmed |
Pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
title_sort |
pump power depreciation by photodarkening in ytterbium-doped fibers and amplifiers |
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2014 |
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https://hdl.handle.net/10356/103388 http://hdl.handle.net/10220/19303 |
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1681047862025125888 |