{
  "abstract": "Achieving sub-cycle waveform control with attosecond-level precision while reaching shot-noise-limited amplitude stability in the mid-infrared spectral range remains a central challenge for ultrafast and precision optical science. Here, we demonstrate a fully stabilized, ultra-stable optical frequency comb (OFC) based on a Kerr-lens mode-locked Cr:ZnS laser operating at 2.3 $μ$m. The oscillator delivers 40 fs pulses at a 25 MHz repetition rate, which are spectrally broadened to cover two octaves and compressed to a 1.4-cycle, 11 fs duration. Pumped by a custom low-noise erbium-doped fiber amplifier, the laser exhibits an integrated relative intensity noise (RIN) of 0.0026% over 10 Hz--1 MHz, while the noise of the few-cycle output is further suppressed to 0.0017% and reaches the shot-noise limit for Fourier frequencies above 5 kHz. It represents the lowest amplitude noise reported to date for any mode-locked laser. This unprecedented amplitude stability enables carrier-envelope phase (CEP) stabilization with a residual integrated phase noise of only 1.5 mrad (10 Hz--12.5 MHz), corresponding to a CEP jitter of 1.8 as, the highest phase stability for any laser system ever reported. The long-term performance of the fully stabilized OFC is measured over 24 hours, with a power stability of 0.01% and a residual CEP noise of 17 mrad. By combining few-cycle mid-infrared pulses with shot-noise-limited intensity noise and attosecond-level phase stability, the reported OFC provides access to new regimes of quantum-limited metrology and control of ultrafast light-matter interactions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.01359",
  "author_total": 8,
  "authors": [
    {
      "name": "Maciej Kowalczyk"
    },
    {
      "name": "Jakub Jaworski"
    },
    {
      "name": "Michał Pietrzak"
    },
    {
      "name": "Karolina Suliga"
    },
    {
      "name": "Paweł Szczypkowski"
    },
    {
      "name": "Paweł Kaczmarek"
    },
    {
      "name": "Alexander Weigel"
    },
    {
      "name": "Jarosław Sotor"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bgaj00z2eywnm.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.01359",
  "fulltext_url": null,
  "id": "bgaj00z2eywnm",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.01359",
  "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",
      "3107|Advanced Fiber Laser Technologies"
    ]
  ],
  "openalex": "W7206151218",
  "pdf_url": "https://arxiv.org/pdf/2609.01359",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bgaj00z2eywnm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "2609.01359",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.01359"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Shot-noise-limited few-cycle mid-infrared frequency comb with attosecond phase stability",
  "title_text": "Shot-noise-limited few-cycle mid-infrared frequency comb with attosecond phase stability",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:00Z",
  "url": "https://research.draconitic.com/paper/bgaj00z2eywnm",
  "venue": "arXiv",
  "versions": []
}