{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:ZH26XORLCZKOQPR2HPOYQPMONT","short_pith_number":"pith:ZH26XORL","schema_version":"1.0","canonical_sha256":"c9f5ebba2b1654e83e3a3bdd883d8e6cf94cc434ca0be3109d6504bbf1d61ac7","source":{"kind":"arxiv","id":"1105.1434","version":1},"attestation_state":"computed","paper":{"title":"Ultralow phase noise microwave generation with an Er:fiber-based optical frequency divider","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. D. Ludlow, C. W. Oates, F. Quinlan, J. A. Taylor, M. J. Thorpe, M. S. Kirchner, N. Lemke, S. A. Diddams, T. M. Fortier, Y. Jiang","submitted_at":"2011-05-07T11:41:42Z","abstract_excerpt":"We present an optical frequency divider based on a 200 MHz repetition rate Er:fiber mode-locked laser that, when locked to a stable optical frequency reference, generates microwave signals with absolute phase noise that is equal to or better than cryogenic microwave oscillators. At 1 Hz offset from a 10 GHz carrier, the phase noise is below -100 dBc/Hz, limited by the optical reference. For offset frequencies > 10 kHz, the phase noise is shot noise limited at -145 dBc/Hz. An analysis of the contribution of the residual noise from the Er:fiber optical frequency divider is also presented."},"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":"1105.1434","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2011-05-07T11:41:42Z","cross_cats_sorted":[],"title_canon_sha256":"79f7924aab79670be0cf2d6bb8d6bdc89112cf5f5d546be87b7c647eaa84a8ad","abstract_canon_sha256":"1485a03aab13165e52257e009d4b005047ff086443001d9bf6778f195c204e53"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:02.929009Z","signature_b64":"rzoQQ0AUIGMagfjL3l55/hXF+kgH/cmb1Q5a8yKIs/6WDA5cz5hf4rpfMgOv4QUfaTJU4JZzSAvJI34Z3hqJBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9f5ebba2b1654e83e3a3bdd883d8e6cf94cc434ca0be3109d6504bbf1d61ac7","last_reissued_at":"2026-05-18T02:02:02.928281Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:02.928281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ultralow phase noise microwave generation with an Er:fiber-based optical frequency divider","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"A. D. Ludlow, C. W. Oates, F. Quinlan, J. A. Taylor, M. J. Thorpe, M. S. Kirchner, N. Lemke, S. A. Diddams, T. M. Fortier, Y. Jiang","submitted_at":"2011-05-07T11:41:42Z","abstract_excerpt":"We present an optical frequency divider based on a 200 MHz repetition rate Er:fiber mode-locked laser that, when locked to a stable optical frequency reference, generates microwave signals with absolute phase noise that is equal to or better than cryogenic microwave oscillators. At 1 Hz offset from a 10 GHz carrier, the phase noise is below -100 dBc/Hz, limited by the optical reference. For offset frequencies > 10 kHz, the phase noise is shot noise limited at -145 dBc/Hz. An analysis of the contribution of the residual noise from the Er:fiber optical frequency divider is also presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.1434","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"1105.1434","created_at":"2026-05-18T02:02:02.928403+00:00"},{"alias_kind":"arxiv_version","alias_value":"1105.1434v1","created_at":"2026-05-18T02:02:02.928403+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.1434","created_at":"2026-05-18T02:02:02.928403+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZH26XORLCZKO","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZH26XORLCZKOQPR2","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZH26XORL","created_at":"2026-05-18T12:26:47.523578+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/ZH26XORLCZKOQPR2HPOYQPMONT","json":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT.json","graph_json":"https://pith.science/api/pith-number/ZH26XORLCZKOQPR2HPOYQPMONT/graph.json","events_json":"https://pith.science/api/pith-number/ZH26XORLCZKOQPR2HPOYQPMONT/events.json","paper":"https://pith.science/paper/ZH26XORL"},"agent_actions":{"view_html":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT","download_json":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT.json","view_paper":"https://pith.science/paper/ZH26XORL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1105.1434&json=true","fetch_graph":"https://pith.science/api/pith-number/ZH26XORLCZKOQPR2HPOYQPMONT/graph.json","fetch_events":"https://pith.science/api/pith-number/ZH26XORLCZKOQPR2HPOYQPMONT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT/action/storage_attestation","attest_author":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT/action/author_attestation","sign_citation":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT/action/citation_signature","submit_replication":"https://pith.science/pith/ZH26XORLCZKOQPR2HPOYQPMONT/action/replication_record"}},"created_at":"2026-05-18T02:02:02.928403+00:00","updated_at":"2026-05-18T02:02:02.928403+00:00"}