{
  "abstract": "This paper investigates the energy-flux noise induced by imperfections of the Gaussian beam (GB) in the Li-Baker high-frequency gravitational wave (HFGW) detector. Modeling these imperfections with higher-order Laguerre-Gaussian (LG) beams, we analytically derive the resulting noise-to-signal ratio for both co- and cross-polarized $\\mathrm{LG}_{nl}$ modes. It is found that higher-order co-polarized LG beams generate no tangential energy-flux noise at the optimal detection plane ($ϕ=π/2$ or $3π/2$), whereas higher-order cross-polarized LG beams introduce non-negligible noise. Specifically, for an individual higher-order cross-polarized $\\mathrm{LG}_{nl}$ mode under our representative parameters, maintaining the noise-to-signal ratio below unity typically requires the power fraction to satisfy $σ_{nl}<10^{-46}$, with the $\\mathrm{LG}_{01}$ mode imposing the most stringent constraint of $σ_{01}<6.0\\times10^{-49}$. Monte Carlo simulations suggest that the total power fraction $σ_{\\mathrm{total}}$ of multiple higher-order cross-polarized $\\mathrm{LG}_{nl}$ modes needs to remain below $10^{-49}$. Consequently, we propose employing a polarization filter to retain only the co-polarized component of the GB adopted in the practical experiment, thereby suppressing the noise while preserving signal integrity. These results provide theoretical guidance for noise control in the Li-Baker HFGW detector.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.39248",
  "author_total": 5,
  "authors": [
    {
      "name": "Lin-Lin Yang"
    },
    {
      "name": "Hao Yu"
    },
    {
      "name": "Pan-Pan Wang"
    },
    {
      "name": "Jin Li"
    },
    {
      "name": "Cheng-Gang Shao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6h61d2bqbj4x7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.39248",
  "fulltext_url": null,
  "id": "6h61d2bqbj4x7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.39248",
  "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",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "gr-qc"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.39248",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6h61d2bqbj4x7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.39248",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.39248"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Energy-flux noise induced by imperfections of the Gaussian beam in the Li-Baker HFGW detector",
  "title_text": "Energy-flux noise induced by imperfections of the Gaussian beam in the Li-Baker HFGW detector",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/6h61d2bqbj4x7",
  "venue": "arXiv",
  "versions": []
}