{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:WTMLHNYCTS2XHX2I2MVDEJQBO7","short_pith_number":"pith:WTMLHNYC","schema_version":"1.0","canonical_sha256":"b4d8b3b7029cb573df48d32a32260177c7a22f438f86babe767281660303386b","source":{"kind":"arxiv","id":"2512.14433","version":2},"attestation_state":"computed","paper":{"title":"Free-Running Ring Quantum Cascade Laser with 50 kHz Linewidth","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexandre Parriaux, Ina Heckelmann, J\\'er\\^ome Faist, Mathieu Bertrand, Mattias Beck, Thomas S\\\"udmeyer","submitted_at":"2025-12-16T14:22:06Z","abstract_excerpt":"We report on the noise characterization of a free-running ring quantum cascade laser resonator emitting a single frequency mode around 7.7 $\\mu$m. Using a gas cell filled with N$_2$O as a frequency-to-voltage discriminator, we measured the frequency noise power spectral density of the laser from which we extracted its linewidth. The results show a full width at half maximum close to 50 kHz at 1 s integration time, which represents at least a sixfold improvement compared to state-of-the-art quantum cascade lasers operating in a spectral region above 7 $\\mu$m. We also demonstrate that such laser"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2512.14433","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-12-16T14:22:06Z","cross_cats_sorted":[],"title_canon_sha256":"52a3cbfdf349c0aacb9fb8cc62c3b439db04cc1ca01616b16ebcd37d28aaf779","abstract_canon_sha256":"2d786329515809d5e90670aba4e2c22a30038527fe37d25d13fb00b6d328fdf5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:05:39.198702Z","signature_b64":"z5EB2gu42PuGAo6ZAEQnnAekiZIVJhbioQ4DWtKjoZRZncc7zirBtoO17DwXWMOds2vyn5gBpsW3D+pACthYBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4d8b3b7029cb573df48d32a32260177c7a22f438f86babe767281660303386b","last_reissued_at":"2026-05-20T00:05:39.197915Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:05:39.197915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Free-Running Ring Quantum Cascade Laser with 50 kHz Linewidth","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexandre Parriaux, Ina Heckelmann, J\\'er\\^ome Faist, Mathieu Bertrand, Mattias Beck, Thomas S\\\"udmeyer","submitted_at":"2025-12-16T14:22:06Z","abstract_excerpt":"We report on the noise characterization of a free-running ring quantum cascade laser resonator emitting a single frequency mode around 7.7 $\\mu$m. Using a gas cell filled with N$_2$O as a frequency-to-voltage discriminator, we measured the frequency noise power spectral density of the laser from which we extracted its linewidth. The results show a full width at half maximum close to 50 kHz at 1 s integration time, which represents at least a sixfold improvement compared to state-of-the-art quantum cascade lasers operating in a spectral region above 7 $\\mu$m. We also demonstrate that such laser"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.14433","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2512.14433/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2512.14433","created_at":"2026-05-20T00:05:39.198039+00:00"},{"alias_kind":"arxiv_version","alias_value":"2512.14433v2","created_at":"2026-05-20T00:05:39.198039+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.14433","created_at":"2026-05-20T00:05:39.198039+00:00"},{"alias_kind":"pith_short_12","alias_value":"WTMLHNYCTS2X","created_at":"2026-05-20T00:05:39.198039+00:00"},{"alias_kind":"pith_short_16","alias_value":"WTMLHNYCTS2XHX2I","created_at":"2026-05-20T00:05:39.198039+00:00"},{"alias_kind":"pith_short_8","alias_value":"WTMLHNYC","created_at":"2026-05-20T00:05:39.198039+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7","json":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7.json","graph_json":"https://pith.science/api/pith-number/WTMLHNYCTS2XHX2I2MVDEJQBO7/graph.json","events_json":"https://pith.science/api/pith-number/WTMLHNYCTS2XHX2I2MVDEJQBO7/events.json","paper":"https://pith.science/paper/WTMLHNYC"},"agent_actions":{"view_html":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7","download_json":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7.json","view_paper":"https://pith.science/paper/WTMLHNYC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2512.14433&json=true","fetch_graph":"https://pith.science/api/pith-number/WTMLHNYCTS2XHX2I2MVDEJQBO7/graph.json","fetch_events":"https://pith.science/api/pith-number/WTMLHNYCTS2XHX2I2MVDEJQBO7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7/action/storage_attestation","attest_author":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7/action/author_attestation","sign_citation":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7/action/citation_signature","submit_replication":"https://pith.science/pith/WTMLHNYCTS2XHX2I2MVDEJQBO7/action/replication_record"}},"created_at":"2026-05-20T00:05:39.198039+00:00","updated_at":"2026-05-20T00:05:39.198039+00:00"}