{
  "abstract": "This work presents an all-fiber broadband wavelength-division multiplexing architecture using 1x7 heterogeneous photonic lanterns (PLs), specifically PL-(6+1) and PL-(4+3). By combining mismatched single-mode cores, namely SM450 and SMF28, without rigid geometric constraints, these devices break system degeneracy and enable passive, wavelength-selective spatial routing. Experimental characterization reveals distinct dual-regime performance across a wide spectral range. In the visible band (350-740 nm), the devices function as multi-channel broadband collectors, effectively guiding light across all channels without spatial separation. Conversely, in the H-band (1520-1610 nm), core asymmetries lift mode degeneracy and maximize propagation constant (beta) matching conditions, thereby enabling passive spectral sorting. These results confirm that unconstrained, free-packaged heterogeneous fiber bundles can meet adiabatic transition criteria, showcasing their potential for next-generation astronomical facilities that require simultaneous multi-wavelength capabilities to feed separate, band-optimized spectrographs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Proc. SPIE 14154, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VII, 141542F (2026)",
  "arxiv": "2609.20642",
  "author_total": 4,
  "authors": [
    {
      "name": "Abani Shankar Nayak"
    },
    {
      "name": "Julius Goehring"
    },
    {
      "name": "Martin M. Roth"
    },
    {
      "name": "Kalaga Madhav"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4edygsf7xj51k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20642",
  "fulltext_url": null,
  "id": "4edygsf7xj51k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20642",
  "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",
      "astro-ph.IM"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.20642",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4edygsf7xj51k.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20642",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20642"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "All-Fiber Broadband Wavelength-Division Multiplexing using Heterogeneous Photonic Lanterns",
  "title_text": "All-Fiber Broadband Wavelength-Division Multiplexing using Heterogeneous Photonic Lanterns",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/4edygsf7xj51k",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1117/12.3102473",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}