{
  "abstract": "We study the polarization dependence of collimated blue light (CBL) generated near 420~nm by resonant four-wave mixing in thermal rubidium vapor in a sapphire-window cell driven at 780 and 776~nm. Sapphire windows can transform the polarization of pump light before it reaches the vapor, complicating the interpretation of polarization-dependent nonlinear emission. We measured the 780-nm pump Stokes state at an external before-cell reference plane to calibrate the common HWP/QWP preparation optics and recorded 266 off-resonant external output Stokes states after the complete sapphire-window rubidium cell at 90, 100, and 110~$^\\circ$C in two propagation orientations. Direct paired-wavelength measurements show a mean before-cell 780/776 separation of $4.29^\\circ$ and temperature- and orientation-specific complete-cell rotations of $22.20^\\circ$--$32.02^\\circ$, with rms residuals of $4.83^\\circ$--$12.87^\\circ$. Using this calibrated co-prepared pump description, we analyzed 2574 measurements of total spectrally filtered 420-nm CBL intensity. Across the six temperature--orientation data sets, a complete nine-coefficient second-order response yielded cross-validated $R^2$ values of 0.636 to 0.828. These paired-wavelength measurements establish, for each temperature--orientation data set, a fixed relative Stokes-space map between the two co-prepared pump trajectories, with the residual of this mapping defining the experimental uncertainty of the correlated two-pump reduction used in the response model. Thus, the resulting framework combines a reconstructed vapor-entrance polarization coordinate with direct two-wavelength calibration of the assembled cell and provides a practical basis for polarization-controlled nonlinear-optical experiments in sapphire-window vapor cells.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.09441",
  "author_total": 3,
  "authors": [
    {
      "name": "Sarah Ashby"
    },
    {
      "name": "David Bostanjyan"
    },
    {
      "name": "Mikayel Khanbekyan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2na9qezskzd2g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.09441",
  "fulltext_url": null,
  "id": "2na9qezskzd2g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.09441",
  "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.atom-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.09441",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2na9qezskzd2g.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.09441",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.09441"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Reconstructing intracell polarization with calibrated sapphire-window optics for collimated blue-light generation in a rubidium cell",
  "title_text": "Reconstructing intracell polarization with calibrated sapphire-window optics for collimated blue-light generation in a rubidium cell",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/2na9qezskzd2g",
  "venue": "arXiv",
  "versions": []
}