{
  "abstract": "Here, we demonstrate a novel optical self-injection-locking scheme integrated with a modulation-free laser frequency stabilization technique co-integrated with a compact vacuum-gap micro-Fabry-Perot cavity (uFP), with Q-factor of 3.46E9, to realize an ultra-stable laser with sub-Hz fundamental linewidth using a silicon photonic chip. The demonstrated electro-optic self-injection locking (EOSIL) chip suppresses a commercial DFB diode laser's frequency noise power spectral density by more than 110 dB at 1 Hz offset, approaching the theoretical thermal noise limit of the uFP cavity, and enables a laser fundamental linewidth of 58 mHz with a fractional frequency instability of 8.68E-13 at 1 sec averaging time. The chip is fabricated using the Advanced Micro Foundry standard silicon photonic process and occupies a footprint of 10 mm^2.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22596",
  "author_total": 7,
  "authors": [
    {
      "name": "Mohamad Hossein Idjadi"
    },
    {
      "name": "Haotian Cheng"
    },
    {
      "name": "Benjia Li"
    },
    {
      "name": "Tzu-Yung Huang"
    },
    {
      "name": "Kwangwoong Kim"
    },
    {
      "name": "Naijun Jin"
    },
    {
      "name": "Peter T. Rakich"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4afnj39h87xvz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22596",
  "fulltext_url": null,
  "id": "4afnj39h87xvz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22596",
  "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",
      "2208|Semiconductor Lasers and Optical Devices"
    ]
  ],
  "openalex": "W7222939049",
  "pdf_url": "https://arxiv.org/pdf/2610.22596",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4afnj39h87xvz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.22596",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22596"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Ultra-stable laser with sub-Hz intrinsic linewidth using a silicon photonic chip",
  "title_text": "Ultra-stable laser with sub-Hz intrinsic linewidth using a silicon photonic chip",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/4afnj39h87xvz",
  "venue": "arXiv",
  "versions": []
}