{"paper":{"title":"Solar-pumped Radiation-balanced Laser","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Ytterbium thin-disk laser with spherical concentrator achieves self-cooled radiation-balanced lasing at 28.5 kW cm^{-2}.","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Hanieh Fattahi, Jasvinder Brar, Michael K\\\"ublb\\\"ock, Mohammad Sahil","submitted_at":"2026-01-02T11:24:49Z","abstract_excerpt":"Solar-pumped lasers, predominantly based on neodymium gain media, offer a promising route to renewable laser-energy conversion and space-based photonics; however, their performance has been constrained by thermal loading and limited power scalability. Here, we propose and numerically investigate a solar-pumped ytterbium thin-disk gain medium combined with a dome concentrator, which enables multipass solar pumping and enhanced absorption. The design yields comparably low lasing thresholds for neodymium- and ytterbium-doped media, while ytterbium provides superior power scalability, enabling up "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Ytterbium-doped medium combined with a spherical concentrator achieves self-cooled lasing at solar pump intensities of 28.5 kW cm-2 within the 1020-1033 nm window, with dual-wavelength pumping enabling radiation-balanced lasing at orders-of-magnitude lower intensities.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The numerical model accurately captures multipass absorption, anti-Stokes fluorescence escape, and thermal balance without unmodeled losses or fabrication imperfections in the thin-disk and concentrator geometry.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Ytterbium thin-disk lasers with multipass solar concentrators achieve radiation-balanced self-cooled operation at 28.5 kW/cm^{2} pump intensity and support dual-wavelength pumping at much lower intensities.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Ytterbium thin-disk laser with spherical concentrator achieves self-cooled radiation-balanced lasing at 28.5 kW cm^{-2}.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"68421afdf1ed671f6f634306a3dc5a508692a7d87c1eab0010cf8eccdb3252e0"},"source":{"id":"2601.00649","kind":"arxiv","version":2},"verdict":{"id":"7df6923a-6f85-4fe8-b984-5a4baa926c08","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T18:20:58.583777Z","strongest_claim":"Ytterbium-doped medium combined with a spherical concentrator achieves self-cooled lasing at solar pump intensities of 28.5 kW cm-2 within the 1020-1033 nm window, with dual-wavelength pumping enabling radiation-balanced lasing at orders-of-magnitude lower intensities.","one_line_summary":"Ytterbium thin-disk lasers with multipass solar concentrators achieve radiation-balanced self-cooled operation at 28.5 kW/cm^{2} pump intensity and support dual-wavelength pumping at much lower intensities.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The numerical model accurately captures multipass absorption, anti-Stokes fluorescence escape, and thermal balance without unmodeled losses or fabrication imperfections in the thin-disk and concentrator geometry.","pith_extraction_headline":"Ytterbium thin-disk laser with spherical concentrator achieves self-cooled radiation-balanced lasing at 28.5 kW cm^{-2}."},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}