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    <pageLast>1460</pageLast>
    <pageNumber>7</pageNumber>
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    <issue>6</issue>
    <volume>38</volume>
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    <title language="eng">Scattering Into Guided Modes Due to Imperfect Graded-Index Structure in Polymer Optical Fibers</title>
    <abstract language="eng">Rayleigh scattering in graded-index polymer optical fibers (GI-POF) is studied under the assumption that spherical scatterers are uniformly distributed within the layers of concentric ring structure. This approximation allows to describe typical imperfections occurring during the fabrication of GI-POFs. For the purpose of experimental characterization by side illumination, an analytical model of the light conversion into waveguide modes has been developed. This model describes the mode excitation by a multiplicative contribution of three different physical mechanisms. The corresponding experimental analysis of the light scattering has been performed and compared with numerical simulation results for the fibers with single-ring and multi-ring structures. Besides the application to GI-POFs, this article can be also applied to multi-step index fibers.</abstract>
    <parentTitle language="eng">Journal of Lightwave Technology</parentTitle>
    <identifier type="issn">0733-8724</identifier>
    <identifier type="doi">10.1109/JLT.2020.2970752</identifier>
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    <author>Alexander A. Shibelgut</author>
    <author>Dmitry A. Konkin</author>
    <author>Rudolph Victorovich Litvinov</author>
    <author>Roman Kruglov</author>
    <author>Christian-Alexander Bunge</author>
    <author>Hans Poisel</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser beams</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Optical fibers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Polymers</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Measurement by laser beam</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rayleigh scattering</value>
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    <collection role="institutes" number="">Fakultät für Elektrotechnik Feinwerktechnik Informationstechnik</collection>
    <collection role="institutes" number="">Polymer Optical Fiber Application Center</collection>
    <collection role="Forschungsschwerpunkt" number="2">Materialien &amp; Produktionstechnik</collection>
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