{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:VHSKEIYMBWBP3G5WPAWQ76TRIG","short_pith_number":"pith:VHSKEIYM","schema_version":"1.0","canonical_sha256":"a9e4a2230c0d82fd9bb6782d0ffa71419cb40f7b5fb798ef31381dc5f01b4b8e","source":{"kind":"arxiv","id":"1907.07675","version":1},"attestation_state":"computed","paper":{"title":"Distributed vibration sensing based on forward transmission and coherent detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY","eess.SY"],"primary_cat":"eess.SP","authors_text":"Alan Pak Tao Lau, Changjian Guo, Chao Lu, Faisal Nadeem Khan, Xian Zhou, Xiong Wu, Yaxi Yan, Ziqi Lin","submitted_at":"2019-07-17T05:57:59Z","abstract_excerpt":"A novel ultra-long distributed vibration sensing (DVS) system using forward transmission and coherent detection is proposed and experimentally demonstrated. In the proposed scheme, a pair of multi-span optical fibers are deployed for sensing, and a loop-back configuration is used by connecting the two fibers at the far end. The homodyne coherent detection is used to retrieve the phase and state-of-polarization (SOP) fluctuations caused by a vibration while the localization of the vibration is realized by tracking the phase changes along the two fibers. The proposed scheme has the advantage of "},"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":"1907.07675","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-07-17T05:57:59Z","cross_cats_sorted":["cs.SY","eess.SY"],"title_canon_sha256":"0025b42368f9bbb66be6e3d6d4f25eb0b1b7428a622ff43c4f12a749580961b8","abstract_canon_sha256":"4e89a1ca58ece86e84d13fb7d700e4394c92aa8763d364c836319139e2654230"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:16.762587Z","signature_b64":"5u/4oUi+WCdSVSKDM63TgpGl+Mb8P5/PdxHyq2SVLl4tlxnxmBZJGVrZQQDJK5LjouaaglDRzMY2lPwiufe1Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9e4a2230c0d82fd9bb6782d0ffa71419cb40f7b5fb798ef31381dc5f01b4b8e","last_reissued_at":"2026-05-17T23:40:16.761923Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:16.761923Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Distributed vibration sensing based on forward transmission and coherent detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY","eess.SY"],"primary_cat":"eess.SP","authors_text":"Alan Pak Tao Lau, Changjian Guo, Chao Lu, Faisal Nadeem Khan, Xian Zhou, Xiong Wu, Yaxi Yan, Ziqi Lin","submitted_at":"2019-07-17T05:57:59Z","abstract_excerpt":"A novel ultra-long distributed vibration sensing (DVS) system using forward transmission and coherent detection is proposed and experimentally demonstrated. In the proposed scheme, a pair of multi-span optical fibers are deployed for sensing, and a loop-back configuration is used by connecting the two fibers at the far end. The homodyne coherent detection is used to retrieve the phase and state-of-polarization (SOP) fluctuations caused by a vibration while the localization of the vibration is realized by tracking the phase changes along the two fibers. The proposed scheme has the advantage of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07675","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":"1907.07675","created_at":"2026-05-17T23:40:16.762035+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.07675v1","created_at":"2026-05-17T23:40:16.762035+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07675","created_at":"2026-05-17T23:40:16.762035+00:00"},{"alias_kind":"pith_short_12","alias_value":"VHSKEIYMBWBP","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_16","alias_value":"VHSKEIYMBWBP3G5W","created_at":"2026-05-18T12:33:30.264802+00:00"},{"alias_kind":"pith_short_8","alias_value":"VHSKEIYM","created_at":"2026-05-18T12:33:30.264802+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/VHSKEIYMBWBP3G5WPAWQ76TRIG","json":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG.json","graph_json":"https://pith.science/api/pith-number/VHSKEIYMBWBP3G5WPAWQ76TRIG/graph.json","events_json":"https://pith.science/api/pith-number/VHSKEIYMBWBP3G5WPAWQ76TRIG/events.json","paper":"https://pith.science/paper/VHSKEIYM"},"agent_actions":{"view_html":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG","download_json":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG.json","view_paper":"https://pith.science/paper/VHSKEIYM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.07675&json=true","fetch_graph":"https://pith.science/api/pith-number/VHSKEIYMBWBP3G5WPAWQ76TRIG/graph.json","fetch_events":"https://pith.science/api/pith-number/VHSKEIYMBWBP3G5WPAWQ76TRIG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG/action/storage_attestation","attest_author":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG/action/author_attestation","sign_citation":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG/action/citation_signature","submit_replication":"https://pith.science/pith/VHSKEIYMBWBP3G5WPAWQ76TRIG/action/replication_record"}},"created_at":"2026-05-17T23:40:16.762035+00:00","updated_at":"2026-05-17T23:40:16.762035+00:00"}