{
  "abstract": "A key challenge in Fiber Bragg Grating (FBG) interrogation for Structural Health Monitoring (SHM) is the simultaneous achievement of high wavelength resolution, high sensing capacity, and high interrogation rate within a compact and scalable system. In this work, an Optical Time Stretch (OTS)-based FBG interrogator is proposed to relax this trade-off by combining a recirculating-loop dispersion module with a Time-to-Digital Converter (TDC)-based electronic readout. The architecture enables large accumulated dispersion and direct real-time temporal acquisition, while remaining compatible with future extensions toward combined TDM–WDM multiplexing. Static validation on strain and temperature sensing yields equivalent time–strain and time–temperature sensitivities of 25.85 ± 0.81 ps/μϵ and 0.85 ± 0.06 ns/°C, respectively, with picometer-level wavelength resolution. A first dynamic proof-of-concept also demonstrates impact detection at a scan rate of 51 kHz, confirming the potential of the proposed system for high-resolution SHM and acoustic/impact monitoring.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "name": "Giovanni Vacirca"
    },
    {
      "name": "Sylvain Magne"
    },
    {
      "name": "Nazih Mechbal"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2a86kf2z913dh.bib",
  "cited_by": 0,
  "doi": "10.58286/33740",
  "fulltext_url": null,
  "id": "2a86kf2z913dh",
  "issns": [
    "1435-4934"
  ],
  "landing_url": "https://cea.hal.science/cea-05753953v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
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      "hal",
      "1.phys.phys"
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    [
      "hal",
      "1.spi.opti"
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      "hal",
      "2.phys.phys.phys-ins-det"
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      "openalex",
      "2208|Advanced Fiber Optic Sensors"
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  "openalex": "W7169598746",
  "pdf_url": "https://www.ndt.net/article/ewshm2026/papers/EWSHM_2026_1275.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-17",
  "publisher": "Nondestructive Testing (NDT)",
  "ris": "https://research.draconitic.com/paper/2a86kf2z913dh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:36Z",
      "native_id": "cea-05753953",
      "source": "hal",
      "url": "https://cea.hal.science/cea-05753953v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:2.phys.phys.phys-ins-det",
      "subfield": "applied-instrumentation"
    }
  ],
  "title": "High-Speed, High-Resolution On-Board Optical Time Stretch-based FBG Interrogation System for SHM",
  "title_text": "High-Speed, High-Resolution On-Board Optical Time Stretch-based FBG Interrogation System for SHM",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:36Z",
  "url": "https://research.draconitic.com/paper/2a86kf2z913dh",
  "venue": "e-Journal of Nondestructive Testing",
  "versions": []
}