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Investigating the coupling efficiency and attenuation of guided waves in D-shaped optical fibers.

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Title: Investigating the coupling efficiency and attenuation of guided waves in D-shaped optical fibers.
Authors: Soman, Rohan1 (AUTHOR) rsoman@imp.gda.pl, Rahman, Waliur2,3 (AUTHOR), Filipkowski, Adam4 (AUTHOR), Anuszkiewicz, Alicja5 (AUTHOR), Kasztelanic, Rafal4 (AUTHOR), Osuch, Tomasz5,6 (AUTHOR), Buczynski, Ryszard4,7 (AUTHOR), Peters, Kara2 (AUTHOR)
Source: Measurement (02632241). May2026, Vol. 273, pN.PAG-N.PAG. 1p.
Subjects: Optical fibers, Fiber Bragg gratings, Computer simulation, Laser Doppler vibrometer, Theory of wave motion, Attenuation (Physics), Structural health monitoring
Abstract: Structural health monitoring (SHM) based on guided waves (GW) have received great interest in last few years particularly for thin-walled structures. The GW are especially attractive as they can inspect large areas with a few discrete sensors and are sensitive to barely-visible structural damages. The utilization of the fiber Bragg grating (FBG) sensors for GW sensing is gaining attention. The FBG sensors have shown some unique abilities such as remote sensing, acoustic coupling, mode filtering etc. But their use has been limited for the GW sensing due to its limited sensitivity. One of the challenges with improving the sensitivity, and ensuring repeatability with the FBG sensors is the uncertainty in the bond quality. This is especially important due to the small area of contact between the fiber and the structure. A solution to this is the use of a D-shaped optical fiber which increase the area in contact. This paper for the first time investigates the coupling efficiency and attenuation of GW in D-shaped fibers using numerical and experimental analysis. For the experimental analysis scanning laser Doppler vibrometer (SLDV) and FBG in edge filtering configuration have been utilized. The experimental results are supported by numerical simulations. The results indicate that the coupling efficiency for the D-shaped fiber improved by 50% as compared to the standard single mode fiber (ssmf) while the attenuation characteristics are comparable. The improved coupling efficiency can allow more widespread utilization of the D-shaped fibers for GW based SHM. • Proof that the D-shaped fiber has 50% better wave coupling efficiency than SMF. • Two techniques: FBG in edge filtering and laser Doppler vibrometer. • Study and comparison of attenuation characteristics of the D-shaped fiber. • This study is undertaken using numerical and experimental data. [ABSTRACT FROM AUTHOR]
Copyright of Measurement (02632241) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192988729
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Investigating the coupling efficiency and attenuation of guided waves in D-shaped optical fibers.
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  Data: <searchLink fieldCode="AR" term="%22Soman%2C+Rohan%22">Soman, Rohan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rsoman@imp.gda.pl</i><br /><searchLink fieldCode="AR" term="%22Rahman%2C+Waliur%22">Rahman, Waliur</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Filipkowski%2C+Adam%22">Filipkowski, Adam</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Anuszkiewicz%2C+Alicja%22">Anuszkiewicz, Alicja</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kasztelanic%2C+Rafal%22">Kasztelanic, Rafal</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Osuch%2C+Tomasz%22">Osuch, Tomasz</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Buczynski%2C+Ryszard%22">Buczynski, Ryszard</searchLink><relatesTo>4,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peters%2C+Kara%22">Peters, Kara</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Measurement+%2802632241%29%22">Measurement (02632241)</searchLink>. May2026, Vol. 273, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Optical+fibers%22">Optical fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Fiber+Bragg+gratings%22">Fiber Bragg gratings</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+Doppler+vibrometer%22">Laser Doppler vibrometer</searchLink><br /><searchLink fieldCode="DE" term="%22Theory+of+wave+motion%22">Theory of wave motion</searchLink><br /><searchLink fieldCode="DE" term="%22Attenuation+%28Physics%29%22">Attenuation (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+health+monitoring%22">Structural health monitoring</searchLink>
– Name: Abstract
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  Data: Structural health monitoring (SHM) based on guided waves (GW) have received great interest in last few years particularly for thin-walled structures. The GW are especially attractive as they can inspect large areas with a few discrete sensors and are sensitive to barely-visible structural damages. The utilization of the fiber Bragg grating (FBG) sensors for GW sensing is gaining attention. The FBG sensors have shown some unique abilities such as remote sensing, acoustic coupling, mode filtering etc. But their use has been limited for the GW sensing due to its limited sensitivity. One of the challenges with improving the sensitivity, and ensuring repeatability with the FBG sensors is the uncertainty in the bond quality. This is especially important due to the small area of contact between the fiber and the structure. A solution to this is the use of a D-shaped optical fiber which increase the area in contact. This paper for the first time investigates the coupling efficiency and attenuation of GW in D-shaped fibers using numerical and experimental analysis. For the experimental analysis scanning laser Doppler vibrometer (SLDV) and FBG in edge filtering configuration have been utilized. The experimental results are supported by numerical simulations. The results indicate that the coupling efficiency for the D-shaped fiber improved by 50% as compared to the standard single mode fiber (ssmf) while the attenuation characteristics are comparable. The improved coupling efficiency can allow more widespread utilization of the D-shaped fibers for GW based SHM. • Proof that the D-shaped fiber has 50% better wave coupling efficiency than SMF. • Two techniques: FBG in edge filtering and laser Doppler vibrometer. • Study and comparison of attenuation characteristics of the D-shaped fiber. • This study is undertaken using numerical and experimental data. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Measurement (02632241) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192988729
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.measurement.2026.121093
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Optical fibers
        Type: general
      – SubjectFull: Fiber Bragg gratings
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Laser Doppler vibrometer
        Type: general
      – SubjectFull: Theory of wave motion
        Type: general
      – SubjectFull: Attenuation (Physics)
        Type: general
      – SubjectFull: Structural health monitoring
        Type: general
    Titles:
      – TitleFull: Investigating the coupling efficiency and attenuation of guided waves in D-shaped optical fibers.
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            NameFull: Soman, Rohan
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            NameFull: Rahman, Waliur
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            NameFull: Filipkowski, Adam
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            – D: 12
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 273
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