{"paper":{"title":"Transient Gas-Dynamics Filamentation of High-PowerFemtosecond Laser Pulse in Compressed Argon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Pressure shock drops in compressed argon trigger early multiple filamentation and broaden femtosecond laser spectra by up to 80 nm in proportion to initial pressure.","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A.M. Kabanov, E.E. Khoroshaeva, P.V. Babushkin, V.K. Oshlakov, Yu.E. Geints","submitted_at":"2026-05-16T02:23:42Z","abstract_excerpt":"We have experimentally investigated the spectral characteristics and spatial structure of femtosecond pulses from a titanium:sapphire laser during filamentation in an optical cell filled with argon at pressures up to 40 atm under pressure shock-drop conditions. This leads to the development of strong jet flows and vortex gas turbulence, which in turn triggers the early onset of multiple filamentation of the optical pulse and largescale broadening of its spectrum throughout the entire duration of the pressure drop. The magnitude of this spectrum broadening can reach 80 nm and is proportional to"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The magnitude of this spectrum broadening can reach 80 nm and is proportional to the initial gas pressure.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the observed early onset of multiple filamentation and spectrum broadening are directly caused by the jet flows and vortex gas turbulence induced by the pressure shock-drop, rather than other factors such as changes in gas density or ionization.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Pressure-drop-induced turbulence in compressed argon triggers early multiple filamentation of femtosecond pulses and broadens their spectrum proportionally to initial gas pressure.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Pressure shock drops in compressed argon trigger early multiple filamentation and broaden femtosecond laser spectra by up to 80 nm in proportion to initial pressure.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"2cfcf001dd3042bab2331569e07a4caff135636a3fac9ec75cc96c3e89fe882c"},"source":{"id":"2605.16763","kind":"arxiv","version":1},"verdict":{"id":"af968b3c-e008-4664-8558-d428dbb5899a","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T20:12:28.459440Z","strongest_claim":"The magnitude of this spectrum broadening can reach 80 nm and is proportional to the initial gas pressure.","one_line_summary":"Pressure-drop-induced turbulence in compressed argon triggers early multiple filamentation of femtosecond pulses and broadens their spectrum proportionally to initial gas pressure.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the observed early onset of multiple filamentation and spectrum broadening are directly caused by the jet flows and vortex gas turbulence induced by the pressure shock-drop, rather than other factors such as changes in gas density or ionization.","pith_extraction_headline":"Pressure shock drops in compressed argon trigger early multiple filamentation and broaden femtosecond laser spectra by up to 80 nm in proportion to initial pressure."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.16763/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T20:31:19.149903Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T20:22:11.452112Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T19:01:56.317305Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T18:33:26.449778Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"ef182f30df720216d90a1f5e1bb913af05e7f75711c91dc1b2a0dbc07feeb5ea"},"references":{"count":30,"sample":[{"doi":"10.1007/978-0-387-","year":2009,"title":"Marshall, Ingram Olkin, and Barry C","work_id":"e0efa539-9eb4-4b9a-b546-a832c00c50a7","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1016/j.physrep.2006.12.005","year":2007,"title":"Femtosecond filamentat ion in transparent media,","work_id":"3da08109-27f3-4f2d-9725-2389da1c13ab","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.3367/ufne.0183.201302b.0133","year":2013,"title":"From self-focusing l ight beams to femtosecond laser pulse filamentation,","work_id":"b0659b9c-bbac-48f8-89da-e9b06ecaa0e6","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1088/1742-6596/497/1/012001","year":2014,"title":"Recent developments in femtosecond filamentation,","work_id":"9e871238-7e60-4817-a403-949684aed337","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1364/oe.16.000466","year":2008,"title":"Physics and applications of atmospheric nonlinear optics and filamentation,","work_id":"54c5bfcb-149a-4ce1-a202-52edd055e3d1","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":30,"snapshot_sha256":"37c84cff52641d5669eec59e39a5bcf9ac27619aeed49b2d1d3f06fde8a7d35b","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"ac232dc6d69afdc13fb401f7d738410b88ccdb96f4ccb3966624f7db66a1bdca"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}