{
  "abstract": "Reconstructive spectrometers (RSs) shift spectral analysis from hardware-heavy dispersion to encoding-decoding schemes. In the speckle-based RSs, spectra are encoded into disordered intensity patterns and then recovered algorithmically. However, characterizing such spectral-encoding transmission matrices (TMs) typically demands empirically complex calibrations, which rely on expensive tunable light sources to generate known wavelengths. In this work, we demonstrate a fully calibration-free RS that leverages conical phase modulation from an axicon. The target spectra are encoded into a Bessel-form intensity profile, enabling computational construction of a deterministic TM and thus completely removing the need for optical calibration. With this computer-generated TM, broadband spectral reconstruction is experimentally achieved across a 650 nm range (1050-1700 nm)--nearly three times the bandwidth of existing calibration-simplified RSs--while a spectral resolution of 2.9 nm remains comparable to that of these counterparts. Compared with an RS requiring optical calibration for equivalent performance, our solution achieves an approximate 36-fold cost reduction.Unlike most speckle RSs, the axicon RS requires no fixed input polarizer, further enhancing energy efficiency and simplicity through polarization-insensitive operation. To the best of our knowledge, this is the first reported experimentally calibration-free RS, featuring superior simplicity, practicality, and cost-effectiveness for practical applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.07021",
  "author_total": 9,
  "authors": [
    {
      "name": "Junrui Liang"
    },
    {
      "name": "Zhongming Huang"
    },
    {
      "name": "Yanting Guo"
    },
    {
      "name": "Jun Ye"
    },
    {
      "name": "Yanzhao Ke"
    },
    {
      "name": "Jun Li"
    },
    {
      "name": "Jiangming Xu"
    },
    {
      "name": "Jinyong Leng"
    },
    {
      "name": "Pu Zhou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/28n6qgky9gr5s.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.07021",
  "fulltext_url": null,
  "id": "28n6qgky9gr5s",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.07021",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "3102|Random lasers and scattering media"
    ]
  ],
  "openalex": "W7220954349",
  "pdf_url": "https://arxiv.org/pdf/2610.07021",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/28n6qgky9gr5s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2610.07021",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.07021"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Calibration-Free Broadband Reconstructive Spectrometer based on Conical Phase Modulation",
  "title_text": "Calibration-Free Broadband Reconstructive Spectrometer based on Conical Phase Modulation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:22Z",
  "url": "https://research.draconitic.com/paper/28n6qgky9gr5s",
  "venue": "arXiv",
  "versions": []
}