{
  "abstract": "Narrow-linewidth lasers with rapid frequency control are essential for atomic physics and quantum technologies, yet combining these capabilities in chip-integrated sources at visible wavelengths remains challenging. Here we demonstrate a hybrid integrated InP/thin-film lithium niobate Pockels laser that emits at 780 nm through intracavity second-harmonic generation and supports gigahertz-bandwidth frequency tuning. A periodically poled lithium niobate waveguide is embedded in a laser cavity terminated by an extended distributed Bragg reflector, which provides electro-optically tunable feedback only at the 1560 nm fundamental wavelength. This design yields a singly resonant cavity that enhances frequency conversion while allowing the second-harmonic output to follow rapid tuning without resonance alignment. The laser achieves intrinsic linewidths of 2.7 kHz at 1560 nm and 9.0 kHz at 780 nm, with electro-optic tuning bandwidths beyond 1 GHz at both wavelengths. A mode-hop-free tuning range of 6.48 GHz at 780 nm enables direct spectroscopy of the rubidium D2 transition. Locking the second-harmonic output to this transition reduces the standard deviation of its frequency fluctuations from 135 MHz to 8 MHz and transfers the atomic frequency reference to the fundamental. These results establish integrated frequency-doubled Pockels lasers as compact, rapidly tunable sources that could simplify the optical architectures for future atomic and quantum photonic systems.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37279",
  "author_total": 12,
  "authors": [
    {
      "name": "Xu Chen"
    },
    {
      "name": "Michael Li"
    },
    {
      "name": "Xiaodong Shi"
    },
    {
      "name": "Lin Zhou"
    },
    {
      "name": "Ran Yang"
    },
    {
      "name": "Mengyao Zhao"
    },
    {
      "name": "Veerendra Dhyani"
    },
    {
      "name": "Sakthi Sanjeev Mohanraj"
    },
    {
      "name": "Guangxing Wu"
    },
    {
      "name": "Hao Hao"
    },
    {
      "name": "Xia Yu"
    },
    {
      "name": "Di Zhu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2qh8b411c2hkb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37279",
  "fulltext_url": null,
  "id": "2qh8b411c2hkb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37279",
  "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",
      "3107|Photorefractive and Nonlinear Optics"
    ]
  ],
  "openalex": "W7224126632",
  "pdf_url": "https://arxiv.org/pdf/2610.37279",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2qh8b411c2hkb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.37279",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37279"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Rubidium-Referenced Frequency-Doubled Pockels Laser with High-Speed Electro-Optic Tuning",
  "title_text": "Rubidium-Referenced Frequency-Doubled Pockels Laser with High-Speed Electro-Optic Tuning",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/2qh8b411c2hkb",
  "venue": "arXiv",
  "versions": []
}