{
  "annotation_id": "0d590281-0a36-411d-a619-9a74415b3fdc",
  "date_created": "2026-02-17T05:53:20.403000Z",
  "date_modified": "2026-02-17T05:53:20.403000Z",
  "file_hash": "613c95e663181590905cdc343fb48a0d1ec9222db05ddfd79bc4203bbdce2161",
  "private": false,
  "record": {
    "abstract": "We propose and experimentally demonstrate an efficient spectral compression technique for optical laser fields. By exploiting the Raman effect of molecular gas confined in a hollow-core capillary we achieve spectral compression of millijoule-level femtosecond laser pulses, attaining a compression ratio up to 14 times with near 50% efficiency. This method also features precise and continuous tunability of the central wavelength. Furthermore, we directly extend this scheme to an ambient air medium, realizing a simple high-energy femtosecond laser spectral tuning apparatus. The developed technique has promising applications in advanced manufacturing, bio-imaging, and material spectroscopic studies.",
    "arxiv_id": "2601.09234",
    "authors": [
      "Zegui Wang",
      "Yunlong Mo",
      "Zaitian Dong",
      "Wanhong Yin",
      "Wei Cao"
    ],
    "categories": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "A Raman-Gas Spectral Compressor for High-Energy Femtosecond Laser Pulses",
    "url": "https://arxiv.org/abs/2601.09234",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9c2dfe6b-7ce1-4854-92a5-903307800764",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}