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Analysis of temperature dependence of photodarkening in ytterbium-doped fibers

机译：掺fibers光纤中光暗化的温度依赖性分析

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摘要

We examine the temperature dependence of photodarkening in ytterbium-doped silica fibers. A sequence of consecutive photodarkening experiments are performed over the same fiber sample, which shows good repeatability with no apparent changes in the glass structure. We find that during infrared irradiation, the level of saturation of the losses can be determined by the fiber core temperature, independent of the previous state of photodarkening losses and fiber temperature, and also at low temperatures where the thermal bleaching is not activated. We observe that variations in the fiber core temperature, induced by pump absorption due to photodarkening, affect the inversion level and photodarkening processes. These effects in turn cause a discrepancy in determining the ion dependence. We highlight the importance of performing the experiments under isothermal conditions and we propose a new approach to control the fiber temperature at room temperature and at elevated temperatures. The approach is based on an isothermal Galinstan bath. The appropriateness of this method is shown by comparing it to different cooling methods, and the results are supported by simulations.
机译：我们研究了掺silica石英纤维中光暗化的温度依赖性。在相同的纤维样品上进行了一系列连续的光暗化实验，显示出良好的重复性，并且玻璃结构没有明显变化。我们发现，在红外辐射过程中，损耗的饱和度可以由纤芯温度来确定，而与光暗损耗和光纤温度的先前状态无关，也可以在未激活热漂白的低温下确定。我们观察到，由于光暗化引起的泵浦吸收引起的纤芯温度变化会影响反演水平和光暗化过程。这些影响又导致确定离子依赖性方面的差异。我们强调了在等温条件下进行实验的重要性，并提出了一种在室温和高温下控制纤维温度的新方法。该方法基于恒温Galinstan浴。通过将其与不同的冷却方法进行比较，表明了该方法的适用性，结果得到了仿真的支持。

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  • 来源
    《Optical engineering》 |2011年第11期|p.111610.1-111610.9|共9页
  • 作者

    Joan J. Montiel i Ponsoda; Changgeng Ye; Jeffrey P. Koplow; Mikko J. Soderlund; Joona J. Koponen; Seppo Honkanen;

  • 作者单位

    Aalto University Department of Micro and Nanosciences Tietotie 3 FIN-02150 Aalto University Finland;

    Aalto University Department of Micro and Nanosciences Tietotie 3 FIN-02150 Aalto University Finland;

    Sandia National Laboratories 7011 East Avenue Livermore, California 94551;

    Beneq Oy Ensimmainen Savu FIN-01510 Vantaa, Finland;

    nLIGHT Corporation Sorronrinne 9 FIN-08500 Lohja, Finland;

    Aalto University Department of Micro and Nanosciences Tietotie 3 FIN-02150 Aalto University, Finland and University of Eastern Finland Department of Physics and Mathematics P.O. Box 111 FIN-80101 Joensuu, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber lasers; rare-earth-doped materials; ytterbium; photodarkening; thermal effects;

    机译：光纤激光器稀土掺杂材料;镱;光暗化热效应;

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