{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KZB5VN7HUHQKCG56EMNL6RRV4O","short_pith_number":"pith:KZB5VN7H","canonical_record":{"source":{"id":"1901.00922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-01-01T14:38:54Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"7fdaf3053c9f92240fe99b3921407dc911ce204b5e63cad894efe76409ca92d8","abstract_canon_sha256":"38d86c7a649855c5d255b3ce9c4a5749497dcc06ca26fb5d6a164d5b71afa7e4"},"schema_version":"1.0"},"canonical_sha256":"5643dab7e7a1e0a11bbe231abf4635e3a8ce003f50d69cfa548fa81844c61af9","source":{"kind":"arxiv","id":"1901.00922","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.00922","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.00922v1","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.00922","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"pith_short_12","alias_value":"KZB5VN7HUHQK","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KZB5VN7HUHQKCG56","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KZB5VN7H","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KZB5VN7HUHQKCG56EMNL6RRV4O","target":"record","payload":{"canonical_record":{"source":{"id":"1901.00922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-01-01T14:38:54Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"7fdaf3053c9f92240fe99b3921407dc911ce204b5e63cad894efe76409ca92d8","abstract_canon_sha256":"38d86c7a649855c5d255b3ce9c4a5749497dcc06ca26fb5d6a164d5b71afa7e4"},"schema_version":"1.0"},"canonical_sha256":"5643dab7e7a1e0a11bbe231abf4635e3a8ce003f50d69cfa548fa81844c61af9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:22.054731Z","signature_b64":"G48W7ftG9RDHKh/hTPVzRuJ/uyjebfSqhMdkciLwXL+jMBgTA9WAFZnS/dj7c18xV3YbvFgU+WZRL8PzGtsqCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5643dab7e7a1e0a11bbe231abf4635e3a8ce003f50d69cfa548fa81844c61af9","last_reissued_at":"2026-05-17T23:50:22.054231Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:22.054231Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.00922","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":"2026-05-17T23:50:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LW6CJf0F1IdYYcOunai90Tr4iFzUA5G8lXfHmhlET5FGuV486tlSI9kY2RaS2KUN9L1B05iM7MKGG8qobOuoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:09:20.328651Z"},"content_sha256":"2a11f5d6e546f11bab8363d6fbb59d8603b0d34077e9a359b3ef6f3813086888","schema_version":"1.0","event_id":"sha256:2a11f5d6e546f11bab8363d6fbb59d8603b0d34077e9a359b3ef6f3813086888"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KZB5VN7HUHQKCG56EMNL6RRV4O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Infrared Laser Locking to Rubidium Saturated Absorption Spectrum via a Photonic Chip Frequency Doubler","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Chang-Ling Zou, Chun-Hua Dong, Guang-Can Guo, Hong X. Tang, Jiacheng Xie, Jia-Qi Wang, Ji-Zhe Zhang, Joshua B. Surya, Rui Niu, Xiang Guo, Xin-Xin Hu, Zhu-Bo Wang","submitted_at":"2019-01-01T14:38:54Z","abstract_excerpt":"Photonic integrated resonators stand out as reliable frequency converters due to their compactness and stability, with second-harmonic generation (SHG) efficiencies of up to 17000%/W reported recently in aluminum nitride microrings. In this work, a sufficiently strong second-harmonic (SH) signal up to microwatts was generated by a photonic integrated frequency doubler using a milliwatt infrared (IR) laser source. Furthermore, increased SHG bandwidth covering $^{85}$Rb and $^{87}$Rb D$_2$ transition lines as well as saturated absorption spectroscopy (SAS) were demonstrated by tuning the pump po"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.00922","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":"2026-05-17T23:50:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LqWkena7/f08/F2Qm0DfR8uyscfV7C7G5q2bwkO/nQ3f3uDQp6XEIIP4iV/Y2cAy0Yob7AC+F2ESDqH5CynZDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T00:09:20.328995Z"},"content_sha256":"9a0a56bb45f4faad03d05a35d2d40680708de94365f4a0585820f2b76d67df84","schema_version":"1.0","event_id":"sha256:9a0a56bb45f4faad03d05a35d2d40680708de94365f4a0585820f2b76d67df84"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/bundle.json","state_url":"https://pith.science/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/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":"2026-06-09T00:09:20Z","links":{"resolver":"https://pith.science/pith/KZB5VN7HUHQKCG56EMNL6RRV4O","bundle":"https://pith.science/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/bundle.json","state":"https://pith.science/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KZB5VN7HUHQKCG56EMNL6RRV4O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KZB5VN7HUHQKCG56EMNL6RRV4O","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":"38d86c7a649855c5d255b3ce9c4a5749497dcc06ca26fb5d6a164d5b71afa7e4","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-01-01T14:38:54Z","title_canon_sha256":"7fdaf3053c9f92240fe99b3921407dc911ce204b5e63cad894efe76409ca92d8"},"schema_version":"1.0","source":{"id":"1901.00922","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.00922","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.00922v1","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.00922","created_at":"2026-05-17T23:50:22Z"},{"alias_kind":"pith_short_12","alias_value":"KZB5VN7HUHQK","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"KZB5VN7HUHQKCG56","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"KZB5VN7H","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:9a0a56bb45f4faad03d05a35d2d40680708de94365f4a0585820f2b76d67df84","target":"graph","created_at":"2026-05-17T23:50:22Z","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":"Photonic integrated resonators stand out as reliable frequency converters due to their compactness and stability, with second-harmonic generation (SHG) efficiencies of up to 17000%/W reported recently in aluminum nitride microrings. In this work, a sufficiently strong second-harmonic (SH) signal up to microwatts was generated by a photonic integrated frequency doubler using a milliwatt infrared (IR) laser source. Furthermore, increased SHG bandwidth covering $^{85}$Rb and $^{87}$Rb D$_2$ transition lines as well as saturated absorption spectroscopy (SAS) were demonstrated by tuning the pump po","authors_text":"Chang-Ling Zou, Chun-Hua Dong, Guang-Can Guo, Hong X. Tang, Jiacheng Xie, Jia-Qi Wang, Ji-Zhe Zhang, Joshua B. Surya, Rui Niu, Xiang Guo, Xin-Xin Hu, Zhu-Bo Wang","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-01-01T14:38:54Z","title":"Infrared Laser Locking to Rubidium Saturated Absorption Spectrum via a Photonic Chip Frequency Doubler"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.00922","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":"sha256:2a11f5d6e546f11bab8363d6fbb59d8603b0d34077e9a359b3ef6f3813086888","target":"record","created_at":"2026-05-17T23:50:22Z","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":"38d86c7a649855c5d255b3ce9c4a5749497dcc06ca26fb5d6a164d5b71afa7e4","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-01-01T14:38:54Z","title_canon_sha256":"7fdaf3053c9f92240fe99b3921407dc911ce204b5e63cad894efe76409ca92d8"},"schema_version":"1.0","source":{"id":"1901.00922","kind":"arxiv","version":1}},"canonical_sha256":"5643dab7e7a1e0a11bbe231abf4635e3a8ce003f50d69cfa548fa81844c61af9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5643dab7e7a1e0a11bbe231abf4635e3a8ce003f50d69cfa548fa81844c61af9","first_computed_at":"2026-05-17T23:50:22.054231Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:22.054231Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G48W7ftG9RDHKh/hTPVzRuJ/uyjebfSqhMdkciLwXL+jMBgTA9WAFZnS/dj7c18xV3YbvFgU+WZRL8PzGtsqCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:22.054731Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.00922","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a11f5d6e546f11bab8363d6fbb59d8603b0d34077e9a359b3ef6f3813086888","sha256:9a0a56bb45f4faad03d05a35d2d40680708de94365f4a0585820f2b76d67df84"],"state_sha256":"3383ac23bdb161dd77c714fe693d82cdbf13abbce6a709826491c11946cd6b89"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MNmYQO4FWtzKkSXCQuWG9FNp3nU0qIu1QrGyiDmY+fQhnr5Eb/fPSXZgeSZrVTUX/DtXKko5Kw9oDcC9mU/TCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T00:09:20.330928Z","bundle_sha256":"e5219c0a43a39c2db551797a3bc2537817a10476a6b895c129d5fcb6047a072d"}}