{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:3FEDXPMZFMGVNO4O2R26DJZCQ5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8698b4e06d5f02cb8edb3cbfcf449489b79e4805869346c67984ec1c59796db6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-06-10T13:50:33Z","title_canon_sha256":"6544f2fd0009eb79792e880501e63b6688fc0c36bb50142ffb2478129140d272"},"schema_version":"1.0","source":{"id":"1306.2205","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.2205","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"arxiv_version","alias_value":"1306.2205v1","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.2205","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"pith_short_12","alias_value":"3FEDXPMZFMGV","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"3FEDXPMZFMGVNO4O","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"3FEDXPMZ","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:555a21aa11da7d86466b227087c1d61954dc40dd2704efe9f58e4f0997290928","target":"graph","created_at":"2026-05-18T01:49:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We demonstrated the observation of Rb two-photon absorption directly excided by an optical frequency comb at fiber communication bands. A chain of comb spectral control is elaborately implemented to increase the power of the second harmonic optical frequency comb generation and the two-photon transition strength. A two-photon transition spectrum is obtained with clearly resolved transition lines. It provides a potential approach to realize the optical frequency comb or optical clock at ~1.5{\\mu}m with high stability and accuracy.","authors_text":"Dong Hou, Jianye Zhao, Jiutao Wu, Xiaoliang Dai, Zhengyu Qin, Zhigang Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-06-10T13:50:33Z","title":"Observation of Rb Two-Photon Absorption Directly Excited by an Erbium-Fiber-Laser-Based Optical Frequency Comb via Spectral Control"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.2205","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6802e9774d899c48f5b992b302061c403ffb893e2599eb2d1c4f1ab42c13d434","target":"record","created_at":"2026-05-18T01:49:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8698b4e06d5f02cb8edb3cbfcf449489b79e4805869346c67984ec1c59796db6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-06-10T13:50:33Z","title_canon_sha256":"6544f2fd0009eb79792e880501e63b6688fc0c36bb50142ffb2478129140d272"},"schema_version":"1.0","source":{"id":"1306.2205","kind":"arxiv","version":1}},"canonical_sha256":"d9483bbd992b0d56bb8ed475e1a722876effb678bd5c88396a71de32fc85e2fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9483bbd992b0d56bb8ed475e1a722876effb678bd5c88396a71de32fc85e2fa","first_computed_at":"2026-05-18T01:49:24.288484Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:24.288484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A1aYgX06cWZwcX8yYEaLZO0qZCoJ5ZCBD6LtkAfpFxjW8O600AGxPguV7P1ktnB4cRKxqfcrmiYBK5CJ4pMTDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:24.289109Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.2205","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6802e9774d899c48f5b992b302061c403ffb893e2599eb2d1c4f1ab42c13d434","sha256:555a21aa11da7d86466b227087c1d61954dc40dd2704efe9f58e4f0997290928"],"state_sha256":"b6d238bbdb75ddf703354c251dbb441bf8b706a37c7d2f258d216754edc08b61"}