{
  "abstract": "Scaling quantum processors and optical atomic clocks fundamentally requires orders-of-magnitude reductions in the size, weight, power, and cost of optical control systems. Photonic integration of lasers is critical to fulfill these requirements. At the near-infrared wavelengths required for atomic clocks and quantum computing through manipulation of rubidium atoms, laser integration is hindered by difficulty in light coupling and poor heat dissipation. Here, we introduce a wafer-scalable method utilizing micro-transfer printing to integrate GaAs-based amplifiers in etched recesses, directly butt-coupled to silicon nitride waveguides. We demonstrate extended-cavity single-mode lasers using this integration approach. Our compact microgear laser achieves a narrow 3 kHz fundamental linewidth at an on-chip output power of >22 mW -- a record for a single-mode heterogeneously integrated laser in the 780-800 nm band -- with a wall-plug efficiency of 9.4%, showcasing the high-power and efficiency potential of this integration approach. Additionally, we demonstrate a widely tunable laser leveraging Vernier filters to achieve lasing with 9 nm coarse tuning, a quasi-continuous fine-tuning range exceeding 140 GHz, and a mode-hop-free tuning range of 45 GHz. Our scalable integrated laser toolkit shows great promise for replacing macroscopic external-cavity diode lasers in next-generation quantum technologies and optical atomic clocks.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.11585",
  "author_total": 11,
  "authors": [
    {
      "name": "Max Kiewiet"
    },
    {
      "name": "Stijn Cuyvers"
    },
    {
      "name": "Tom Reep"
    },
    {
      "name": "Konstantinos Akritidis"
    },
    {
      "name": "Gaudhaman Jeevanandam"
    },
    {
      "name": "Manuel Reza"
    },
    {
      "name": "Roelof Jansen"
    },
    {
      "name": "Pol Van Dorpe"
    },
    {
      "name": "Günther Roelkens"
    },
    {
      "name": "Kasper Van Gasse"
    },
    {
      "name": "Bart Kuyken"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2xjtgxcxvm9ba.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11585",
  "fulltext_url": null,
  "id": "2xjtgxcxvm9ba",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.11585",
  "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"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "2208|Photonic and Optical Devices"
    ]
  ],
  "openalex": "W7212286412",
  "pdf_url": "https://arxiv.org/pdf/2609.11585",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2xjtgxcxvm9ba.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.11585",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11585"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Heterogeneously Integrated Efficient and Widely Tunable Lasers at 795 nm for Rubidium-Based Quantum Technologies",
  "title_text": "Heterogeneously Integrated Efficient and Widely Tunable Lasers at 795 nm for Rubidium-Based Quantum Technologies",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/2xjtgxcxvm9ba",
  "venue": "arXiv",
  "versions": []
}