{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OODM4MAI446IXAMVE6FCJUFEBO","short_pith_number":"pith:OODM4MAI","canonical_record":{"source":{"id":"1810.02585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T09:46:41Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1db592b189bf277813f3c4c21a3d3766c0b7804c20a9d5df09c833ec19aa23dd","abstract_canon_sha256":"3fce684e91e3cbcb8d8cbb76f1274c6258467bd55f482b60e7e7b6b53a0aa9ab"},"schema_version":"1.0"},"canonical_sha256":"7386ce3008e73c8b8195278a24d0a40b82c01a9a376ae4ef6347df5ac2b275eb","source":{"kind":"arxiv","id":"1810.02585","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.02585","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1810.02585v1","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.02585","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"OODM4MAI446I","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OODM4MAI446IXAMV","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OODM4MAI","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OODM4MAI446IXAMVE6FCJUFEBO","target":"record","payload":{"canonical_record":{"source":{"id":"1810.02585","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T09:46:41Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1db592b189bf277813f3c4c21a3d3766c0b7804c20a9d5df09c833ec19aa23dd","abstract_canon_sha256":"3fce684e91e3cbcb8d8cbb76f1274c6258467bd55f482b60e7e7b6b53a0aa9ab"},"schema_version":"1.0"},"canonical_sha256":"7386ce3008e73c8b8195278a24d0a40b82c01a9a376ae4ef6347df5ac2b275eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:01.331452Z","signature_b64":"uxlSnG5dtkN4GmLp1FAbhIi1GX7bWn92iH/fo7btFY2gprtsjCzFNGs6CjY9UUDRfHt/x1WG3t4j0AvN8ncuCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7386ce3008e73c8b8195278a24d0a40b82c01a9a376ae4ef6347df5ac2b275eb","last_reissued_at":"2026-05-18T00:04:01.330694Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:01.330694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.02585","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":"2026-05-18T00:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z05ehx7sAXDv2fc3oBLUszCPLaCoUxNA7itSmPsIMPNnqRhJ1rvMEcVWB+iHStLmFTmcFUyoQ+KcSR2g+TDiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:06:59.308871Z"},"content_sha256":"4906ba707d0df481d8b22c3729b67c2da66e45e6b5afb4b2be179bdd952709e7","schema_version":"1.0","event_id":"sha256:4906ba707d0df481d8b22c3729b67c2da66e45e6b5afb4b2be179bdd952709e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OODM4MAI446IXAMVE6FCJUFEBO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New opportunities for integrated microwave photonics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"David Marpaung, Jianping Yao, Jose Capmany","submitted_at":"2018-10-05T09:46:41Z","abstract_excerpt":"Recent advances in photonic integration have propelled microwave photonic technologies to new heights. The ability to interface hybrid material platforms to enhance light-matter interactions has led to the developments of ultra-small and high-bandwidth electro-optic modulators, frequency synthesizers with the lowest noise, and chip signal processors with orders-of-magnitude enhanced spectral resolution. On the other hand, the maturity of high-volume semiconductor processing has finally enabled the complete integration of light sources, modulators, and detectors in a single microwave photonic p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.02585","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":"2026-05-18T00:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sm/7nX6XFdSOr99i4oC79+UmDs8VogKjTmm5jjHKJYuYSbYEHJYwj4EBH7MM1ddenqMZcJeNQrLg6HpMLZmABw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T23:06:59.309212Z"},"content_sha256":"720b9741a19b856e79ca22a83d6eb89718c6c3bea8b95a506acc4af04f114428","schema_version":"1.0","event_id":"sha256:720b9741a19b856e79ca22a83d6eb89718c6c3bea8b95a506acc4af04f114428"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OODM4MAI446IXAMVE6FCJUFEBO/bundle.json","state_url":"https://pith.science/pith/OODM4MAI446IXAMVE6FCJUFEBO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OODM4MAI446IXAMVE6FCJUFEBO/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":"2026-07-04T23:06:59Z","links":{"resolver":"https://pith.science/pith/OODM4MAI446IXAMVE6FCJUFEBO","bundle":"https://pith.science/pith/OODM4MAI446IXAMVE6FCJUFEBO/bundle.json","state":"https://pith.science/pith/OODM4MAI446IXAMVE6FCJUFEBO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OODM4MAI446IXAMVE6FCJUFEBO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OODM4MAI446IXAMVE6FCJUFEBO","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":"3fce684e91e3cbcb8d8cbb76f1274c6258467bd55f482b60e7e7b6b53a0aa9ab","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T09:46:41Z","title_canon_sha256":"1db592b189bf277813f3c4c21a3d3766c0b7804c20a9d5df09c833ec19aa23dd"},"schema_version":"1.0","source":{"id":"1810.02585","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.02585","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1810.02585v1","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.02585","created_at":"2026-05-18T00:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"OODM4MAI446I","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OODM4MAI446IXAMV","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OODM4MAI","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:720b9741a19b856e79ca22a83d6eb89718c6c3bea8b95a506acc4af04f114428","target":"graph","created_at":"2026-05-18T00:04:01Z","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":"Recent advances in photonic integration have propelled microwave photonic technologies to new heights. The ability to interface hybrid material platforms to enhance light-matter interactions has led to the developments of ultra-small and high-bandwidth electro-optic modulators, frequency synthesizers with the lowest noise, and chip signal processors with orders-of-magnitude enhanced spectral resolution. On the other hand, the maturity of high-volume semiconductor processing has finally enabled the complete integration of light sources, modulators, and detectors in a single microwave photonic p","authors_text":"David Marpaung, Jianping Yao, Jose Capmany","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T09:46:41Z","title":"New opportunities for integrated microwave photonics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.02585","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":"sha256:4906ba707d0df481d8b22c3729b67c2da66e45e6b5afb4b2be179bdd952709e7","target":"record","created_at":"2026-05-18T00:04:01Z","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":"3fce684e91e3cbcb8d8cbb76f1274c6258467bd55f482b60e7e7b6b53a0aa9ab","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T09:46:41Z","title_canon_sha256":"1db592b189bf277813f3c4c21a3d3766c0b7804c20a9d5df09c833ec19aa23dd"},"schema_version":"1.0","source":{"id":"1810.02585","kind":"arxiv","version":1}},"canonical_sha256":"7386ce3008e73c8b8195278a24d0a40b82c01a9a376ae4ef6347df5ac2b275eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7386ce3008e73c8b8195278a24d0a40b82c01a9a376ae4ef6347df5ac2b275eb","first_computed_at":"2026-05-18T00:04:01.330694Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:01.330694Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uxlSnG5dtkN4GmLp1FAbhIi1GX7bWn92iH/fo7btFY2gprtsjCzFNGs6CjY9UUDRfHt/x1WG3t4j0AvN8ncuCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:01.331452Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.02585","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4906ba707d0df481d8b22c3729b67c2da66e45e6b5afb4b2be179bdd952709e7","sha256:720b9741a19b856e79ca22a83d6eb89718c6c3bea8b95a506acc4af04f114428"],"state_sha256":"6e6affeaacffd68af06674b8fd31d87d60f710c03d05e0912f1fab71edc4010e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A5oIjnx3iD5FjOFRf4ZKjmHPXpQOyRXw2U738L8sP91F2XAVePuShoOPq1nyEkP3X+AceX6G4Hph6Pkl1DwSCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T23:06:59.311237Z","bundle_sha256":"843120b20c75580f564ba9d613e8559f1ec6464eb674527de037678243a6a165"}}