{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ORIFNHX53N3M6DWJMXIVWPR6DJ","short_pith_number":"pith:ORIFNHX5","canonical_record":{"source":{"id":"1807.01037","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-03T09:19:27Z","cross_cats_sorted":[],"title_canon_sha256":"a53259444008a3e0f41dc98be22fb387f0f9ef1c5bf9fbb19d4fa1beeecefc39","abstract_canon_sha256":"3657a4ef4c48938f9b5d48b9fde0d686676bc62f0b484b719899f1714a76321f"},"schema_version":"1.0"},"canonical_sha256":"7450569efddb76cf0ec965d15b3e3e1a6508c65e5545b1ef14f127ba9077bfcf","source":{"kind":"arxiv","id":"1807.01037","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01037","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01037v1","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01037","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"pith_short_12","alias_value":"ORIFNHX53N3M","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"ORIFNHX53N3M6DWJ","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"ORIFNHX5","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ORIFNHX53N3M6DWJMXIVWPR6DJ","target":"record","payload":{"canonical_record":{"source":{"id":"1807.01037","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-03T09:19:27Z","cross_cats_sorted":[],"title_canon_sha256":"a53259444008a3e0f41dc98be22fb387f0f9ef1c5bf9fbb19d4fa1beeecefc39","abstract_canon_sha256":"3657a4ef4c48938f9b5d48b9fde0d686676bc62f0b484b719899f1714a76321f"},"schema_version":"1.0"},"canonical_sha256":"7450569efddb76cf0ec965d15b3e3e1a6508c65e5545b1ef14f127ba9077bfcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:45.579232Z","signature_b64":"ayHpOeGjkrWAGlCcRQpgQbL5mTzWoxX2oAjhB1xBViuR6cFYOxEH5x/TV/7eE5DKD2XXwl2osA+zAZ1vY8GrCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7450569efddb76cf0ec965d15b3e3e1a6508c65e5545b1ef14f127ba9077bfcf","last_reissued_at":"2026-05-18T00:11:45.578648Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:45.578648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.01037","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:11:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z9qD6512TYnGYCB9tOZ1inggp9Ee/T7BkqL5Y+hGEqejBAQwX2yJ5gzMTE20xTf3/p5NHkBuchZMf4YQDIuIAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:12:35.272776Z"},"content_sha256":"c12c861304b84814dcd01f91b1dbcc7aba573632df69590eff6441e45ae81a5b","schema_version":"1.0","event_id":"sha256:c12c861304b84814dcd01f91b1dbcc7aba573632df69590eff6441e45ae81a5b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ORIFNHX53N3M6DWJMXIVWPR6DJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mode-locked fiber laser with offset splicing between two multimode fibers as a saturable absorber","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Chun Gu, Lixin Xu, Peijun Yao, Shujie Li, Zhipeng Dong","submitted_at":"2018-07-03T09:19:27Z","abstract_excerpt":"A novel mode-locked fiber laser based on offset splicing technology between two kinds of graded index multimode fibers is proposed and experimentally demonstrated. The offset splice spot structure acts as a saturable absorber via nonlinear multimodal interference mechanism. The absorption modulation depth of the device is 2.8%, with a saturation intensity of 2.5 MW/cm2. The fiber laser operates at a stable mode-locked state when the pump power reaches 114 mW. The laser oscillates at 1039 nm with a pulsewidth of 17.6 ps, a repetition rate of 32.619 MHz, and a high signal noise ratio of 65 dB. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01037","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:11:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kA/dsBUXKEjL3+bMFJhkijmcBIHNkikXrJXlntAYCFeOkwntEToOGe38b8m0Q6bQlVktlx1D2mObXEZkmQ6eBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:12:35.273440Z"},"content_sha256":"087ca96ad8775069771efd69b7e68bd005aa282ac66a58ff3cca60537d6e25b2","schema_version":"1.0","event_id":"sha256:087ca96ad8775069771efd69b7e68bd005aa282ac66a58ff3cca60537d6e25b2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/bundle.json","state_url":"https://pith.science/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T13:12:35Z","links":{"resolver":"https://pith.science/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ","bundle":"https://pith.science/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/bundle.json","state":"https://pith.science/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ORIFNHX53N3M6DWJMXIVWPR6DJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ORIFNHX53N3M6DWJMXIVWPR6DJ","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":"3657a4ef4c48938f9b5d48b9fde0d686676bc62f0b484b719899f1714a76321f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-03T09:19:27Z","title_canon_sha256":"a53259444008a3e0f41dc98be22fb387f0f9ef1c5bf9fbb19d4fa1beeecefc39"},"schema_version":"1.0","source":{"id":"1807.01037","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01037","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01037v1","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01037","created_at":"2026-05-18T00:11:45Z"},{"alias_kind":"pith_short_12","alias_value":"ORIFNHX53N3M","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"ORIFNHX53N3M6DWJ","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"ORIFNHX5","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:087ca96ad8775069771efd69b7e68bd005aa282ac66a58ff3cca60537d6e25b2","target":"graph","created_at":"2026-05-18T00:11:45Z","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":"A novel mode-locked fiber laser based on offset splicing technology between two kinds of graded index multimode fibers is proposed and experimentally demonstrated. The offset splice spot structure acts as a saturable absorber via nonlinear multimodal interference mechanism. The absorption modulation depth of the device is 2.8%, with a saturation intensity of 2.5 MW/cm2. The fiber laser operates at a stable mode-locked state when the pump power reaches 114 mW. The laser oscillates at 1039 nm with a pulsewidth of 17.6 ps, a repetition rate of 32.619 MHz, and a high signal noise ratio of 65 dB. T","authors_text":"Chun Gu, Lixin Xu, Peijun Yao, Shujie Li, Zhipeng Dong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-03T09:19:27Z","title":"Mode-locked fiber laser with offset splicing between two multimode fibers as a saturable absorber"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01037","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:c12c861304b84814dcd01f91b1dbcc7aba573632df69590eff6441e45ae81a5b","target":"record","created_at":"2026-05-18T00:11:45Z","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":"3657a4ef4c48938f9b5d48b9fde0d686676bc62f0b484b719899f1714a76321f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-07-03T09:19:27Z","title_canon_sha256":"a53259444008a3e0f41dc98be22fb387f0f9ef1c5bf9fbb19d4fa1beeecefc39"},"schema_version":"1.0","source":{"id":"1807.01037","kind":"arxiv","version":1}},"canonical_sha256":"7450569efddb76cf0ec965d15b3e3e1a6508c65e5545b1ef14f127ba9077bfcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7450569efddb76cf0ec965d15b3e3e1a6508c65e5545b1ef14f127ba9077bfcf","first_computed_at":"2026-05-18T00:11:45.578648Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:45.578648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ayHpOeGjkrWAGlCcRQpgQbL5mTzWoxX2oAjhB1xBViuR6cFYOxEH5x/TV/7eE5DKD2XXwl2osA+zAZ1vY8GrCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:45.579232Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.01037","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c12c861304b84814dcd01f91b1dbcc7aba573632df69590eff6441e45ae81a5b","sha256:087ca96ad8775069771efd69b7e68bd005aa282ac66a58ff3cca60537d6e25b2"],"state_sha256":"1f5a295460eb6768a5f182e3184f597cda8b19d33f9f6b89cd3c24f09ebd8b82"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QO/R+VhSqZQoTd7dJm9shLmbMMjGntF/VWzkxfHoLpOv2NyqjG/ANyu/FbxRzILOGHW1Uk0iVhh1g0HDhxfJDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:12:35.276686Z","bundle_sha256":"3ed3fbb8a8e2c753bff25b7c15d7f94d3a4cf68f65eae5bbfc1afded1d0a7309"}}