{
  "abstract": "Whispering-gallery-mode (WGM) microlasers are promising for refractometric sensing, but their practical implementation can be limited by the need for stable resonator-coupler alignment. Here, we demonstrate a Rhodamine B-doped polymer WGM microring laser directly fabricated on an optical-fiber tip, eliminating the external resonator-fiber coupling interface at the sensing head. Micro-droplet coating and UV laser direct writing are combined for fabrication, while finite-difference time-domain simulations guide the microring laser design. The microlasers operate in air and water with thresholds of 0.224 uJ and 0.458 uJ, respectively. Refractometric measurements in aqueous glucose solutions yield a bulk refractive index sensitivity of 364.95 nm/RIU and a detection limit of 2.47 x 10^(-4) RIU. Water-induced polymer changes and photobleaching are also investigated. This fiber-tip architecture provides a basis for probe-based refractometric sensing in environmental and biochemical applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.08805",
  "author_total": 5,
  "authors": [
    {
      "name": "Mobin Yaghoobi"
    },
    {
      "name": "Seyedeh Mahshad Hosseini"
    },
    {
      "name": "Leila Hajshahvaladi"
    },
    {
      "name": "Gholam-Mohammad Parsanasab"
    },
    {
      "name": "Mohammad Ismail Zibaii"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a4thkmr6s565k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.08805",
  "fulltext_url": null,
  "id": "a4thkmr6s565k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.08805",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.08805",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a4thkmr6s565k.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.08805",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.08805"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Laser-Direct-Written polymer WGM microring laser integrated on a fiber tip for refractive index sensing",
  "title_text": "Laser-Direct-Written polymer WGM microring laser integrated on a fiber tip for refractive index sensing",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/a4thkmr6s565k",
  "venue": "arXiv",
  "versions": []
}