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    "headline": "Mixed Fiber Cores Sorted H-Band Light Passively",
    "slug": "mixed-fiber-cores-sorted-h-band-light-passively",
    "dek": "The same 1×7 lanterns collected visible light broadly and separated 1520–1610-nanometer bands by spatial route.",
    "summary": "The same 1×7 lanterns collected visible light broadly and separated 1520–1610-nanometer bands by spatial route.",
    "body_text": "Heterogeneous bundles of SM450 and SMF28 cores break modal degeneracy without a rigid geometry. Experiments found broadband collection from 350 to 740 nanometers and passive spectral sorting in the H band, a potential route to feeding band-optimized astronomical spectrographs.",
    "why_it_matters": "The same 1×7 lanterns collected visible light broadly and separated 1520–1610-nanometer bands by spatial route.",
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    "first_published_at": "2026-09-19T09:00:00.000-04:00",
    "modified_at": "2026-09-19T09:00:00.000-04:00",
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        "text": "The same 1×7 lanterns collected visible light broadly and separated 1520–1610-nanometer bands by spatial route.",
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    "tags": [
      "photonic lanterns",
      "spectrographs",
      "fiber optics"
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    "image_url": null,
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  "sources": [
    {
      "source_id": "source-2026-09-19-018",
      "title": "arXiv preprint 2609.20642",
      "publisher": "arXiv",
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      "published_at": "2026-09-17T12:25:01.000-04:00",
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  "publisher": {
    "name": "The Machine Press",
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    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "Mixed Fiber Cores Sorted H-Band Light Passively",
    "publisher": "The Machine Press",
    "published_at": "2026-09-19T09:00:00.000-04:00",
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