{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:3LBYY2BSGVHQGP3DWTLYKLL3T7","short_pith_number":"pith:3LBYY2BS","canonical_record":{"source":{"id":"2303.00425","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-01T11:25:32Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"a8c47253cb60c12c806cf4884633ffaf3b6cd4ffdddfdf7dcfd45858577a73ab","abstract_canon_sha256":"dc81752036a0262c7a2884cce3cc8b51a57b4d0a5bea0c4e4f1c236f85031a8f"},"schema_version":"1.0"},"canonical_sha256":"dac38c6832354f033f63b4d7852d7b9fc13d4667ebed276765cd3288cbfe81ab","source":{"kind":"arxiv","id":"2303.00425","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.00425","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"arxiv_version","alias_value":"2303.00425v2","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.00425","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_12","alias_value":"3LBYY2BSGVHQ","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_16","alias_value":"3LBYY2BSGVHQGP3D","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_8","alias_value":"3LBYY2BS","created_at":"2026-07-05T05:52:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:3LBYY2BSGVHQGP3DWTLYKLL3T7","target":"record","payload":{"canonical_record":{"source":{"id":"2303.00425","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-01T11:25:32Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"a8c47253cb60c12c806cf4884633ffaf3b6cd4ffdddfdf7dcfd45858577a73ab","abstract_canon_sha256":"dc81752036a0262c7a2884cce3cc8b51a57b4d0a5bea0c4e4f1c236f85031a8f"},"schema_version":"1.0"},"canonical_sha256":"dac38c6832354f033f63b4d7852d7b9fc13d4667ebed276765cd3288cbfe81ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:52:27.224330Z","signature_b64":"Zt6Yjml8SJLyUacbBFSaqLKqyjjKZ5VsNyBg8oZqMH/X9BXiX+gQ+9/aP5i5v0u9TkblSpIReUnGVC1Ae/xBCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dac38c6832354f033f63b4d7852d7b9fc13d4667ebed276765cd3288cbfe81ab","last_reissued_at":"2026-07-05T05:52:27.223880Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:52:27.223880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.00425","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:52:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N6gYE/utYaXLC/seCm4LLofT5QhmGRtOJ6AeCf+KD1EF/f9S70wQtR5AeEwf9oaD40RyRh2nvWT0bA3dBOOOAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T14:14:20.926985Z"},"content_sha256":"9e8e0ff54706b92ce4bfff927d8b624428e6f6a57f0df5f041a60f71933eb5a1","schema_version":"1.0","event_id":"sha256:9e8e0ff54706b92ce4bfff927d8b624428e6f6a57f0df5f041a60f71933eb5a1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:3LBYY2BSGVHQGP3DWTLYKLL3T7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Frequency agile photonic integrated external cavity laser","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Alena Attanasio, Anat Siddharth, Andrea Bancora, Andrey Voloshin, Diego Visani, Grigory Lihachev, Hao Tian, Johann Riemensberger, Rui Ning Wang, Sunil Bhave, Tobias J. Kippenberg, Viacheslav Snigirev, Vladimir Shadymov","submitted_at":"2023-03-01T11:25:32Z","abstract_excerpt":"Recent advances in the development of ultra-low loss silicon nitride integrated photonic circuits have heralded a new generation of integrated lasers capable of reaching fiber laser coherence. However, these devices presently are based on self-injection locking of distributed feedback (DFB) laser diodes, increasing both the cost and requiring tuning of laser setpoints for their operation. In contrast, turn-key legacy laser systems use reflective semiconductor optical amplifiers (RSOA). While this scheme has been utilized for integrated photonics-based lasers, so far, no cost-effective RSOA-bas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.00425","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/2303.00425/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:52:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TF4l78sDQjxcuM7wDqNB1Jut1IajgvAv+gr3adOfWthn6YwYGGDgT597hglCv+rMqU0k8x/0q9MgO4F58HgXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T14:14:20.927353Z"},"content_sha256":"e92ab95d8c82488175d35d74cfe1cd33a5f8b1ba850306ce7b8744ef5920a3e2","schema_version":"1.0","event_id":"sha256:e92ab95d8c82488175d35d74cfe1cd33a5f8b1ba850306ce7b8744ef5920a3e2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/bundle.json","state_url":"https://pith.science/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/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":"2026-08-20T14:14:20Z","links":{"resolver":"https://pith.science/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7","bundle":"https://pith.science/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/bundle.json","state":"https://pith.science/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3LBYY2BSGVHQGP3DWTLYKLL3T7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:3LBYY2BSGVHQGP3DWTLYKLL3T7","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":"dc81752036a0262c7a2884cce3cc8b51a57b4d0a5bea0c4e4f1c236f85031a8f","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-01T11:25:32Z","title_canon_sha256":"a8c47253cb60c12c806cf4884633ffaf3b6cd4ffdddfdf7dcfd45858577a73ab"},"schema_version":"1.0","source":{"id":"2303.00425","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.00425","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"arxiv_version","alias_value":"2303.00425v2","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.00425","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_12","alias_value":"3LBYY2BSGVHQ","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_16","alias_value":"3LBYY2BSGVHQGP3D","created_at":"2026-07-05T05:52:27Z"},{"alias_kind":"pith_short_8","alias_value":"3LBYY2BS","created_at":"2026-07-05T05:52:27Z"}],"graph_snapshots":[{"event_id":"sha256:e92ab95d8c82488175d35d74cfe1cd33a5f8b1ba850306ce7b8744ef5920a3e2","target":"graph","created_at":"2026-07-05T05:52:27Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2303.00425/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent advances in the development of ultra-low loss silicon nitride integrated photonic circuits have heralded a new generation of integrated lasers capable of reaching fiber laser coherence. However, these devices presently are based on self-injection locking of distributed feedback (DFB) laser diodes, increasing both the cost and requiring tuning of laser setpoints for their operation. In contrast, turn-key legacy laser systems use reflective semiconductor optical amplifiers (RSOA). While this scheme has been utilized for integrated photonics-based lasers, so far, no cost-effective RSOA-bas","authors_text":"Alena Attanasio, Anat Siddharth, Andrea Bancora, Andrey Voloshin, Diego Visani, Grigory Lihachev, Hao Tian, Johann Riemensberger, Rui Ning Wang, Sunil Bhave, Tobias J. Kippenberg, Viacheslav Snigirev, Vladimir Shadymov","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-01T11:25:32Z","title":"Frequency agile photonic integrated external cavity laser"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.00425","kind":"arxiv","version":2},"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":"sha256:9e8e0ff54706b92ce4bfff927d8b624428e6f6a57f0df5f041a60f71933eb5a1","target":"record","created_at":"2026-07-05T05:52:27Z","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":"dc81752036a0262c7a2884cce3cc8b51a57b4d0a5bea0c4e4f1c236f85031a8f","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2023-03-01T11:25:32Z","title_canon_sha256":"a8c47253cb60c12c806cf4884633ffaf3b6cd4ffdddfdf7dcfd45858577a73ab"},"schema_version":"1.0","source":{"id":"2303.00425","kind":"arxiv","version":2}},"canonical_sha256":"dac38c6832354f033f63b4d7852d7b9fc13d4667ebed276765cd3288cbfe81ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dac38c6832354f033f63b4d7852d7b9fc13d4667ebed276765cd3288cbfe81ab","first_computed_at":"2026-07-05T05:52:27.223880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:52:27.223880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zt6Yjml8SJLyUacbBFSaqLKqyjjKZ5VsNyBg8oZqMH/X9BXiX+gQ+9/aP5i5v0u9TkblSpIReUnGVC1Ae/xBCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:52:27.224330Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.00425","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e8e0ff54706b92ce4bfff927d8b624428e6f6a57f0df5f041a60f71933eb5a1","sha256:e92ab95d8c82488175d35d74cfe1cd33a5f8b1ba850306ce7b8744ef5920a3e2"],"state_sha256":"d66d11ca21bd7c4d0f78dc1e53291e03fb6ebd1b0a17d0450b5624e87ce191a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m1WZRMNqZRQiqBAfB77KAxoCDbwZZ8byg42cCGe7gLSW2Dev3lp0clCWTp3/I6ceTshWFkFreVBoZTTxcf2CBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T14:14:20.930610Z","bundle_sha256":"8ed3afce76b6aefd1993709ae0304421d5b60d02102ecba9c675b9082ef8cfe7"}}