{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:2BHILTMGKQFFA3AH46TA3EYDLF","short_pith_number":"pith:2BHILTMG","canonical_record":{"source":{"id":"1307.6761","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-07-25T14:47:05Z","cross_cats_sorted":[],"title_canon_sha256":"c55619df16dc39fa9748ed1e3308a1a6a435a83000277aa525bce65ed3fe26b2","abstract_canon_sha256":"5c9cdf60edf4e0643d384d743a48c42c2665ee2f683add6b4f6d9a58962f889b"},"schema_version":"1.0"},"canonical_sha256":"d04e85cd86540a506c07e7a60d93035958e923c5d3d90e49fb7c57c45956ad8b","source":{"kind":"arxiv","id":"1307.6761","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.6761","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"arxiv_version","alias_value":"1307.6761v1","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6761","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"pith_short_12","alias_value":"2BHILTMGKQFF","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2BHILTMGKQFFA3AH","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2BHILTMG","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:2BHILTMGKQFFA3AH46TA3EYDLF","target":"record","payload":{"canonical_record":{"source":{"id":"1307.6761","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-07-25T14:47:05Z","cross_cats_sorted":[],"title_canon_sha256":"c55619df16dc39fa9748ed1e3308a1a6a435a83000277aa525bce65ed3fe26b2","abstract_canon_sha256":"5c9cdf60edf4e0643d384d743a48c42c2665ee2f683add6b4f6d9a58962f889b"},"schema_version":"1.0"},"canonical_sha256":"d04e85cd86540a506c07e7a60d93035958e923c5d3d90e49fb7c57c45956ad8b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:17:34.736525Z","signature_b64":"75Ug/ATVr4DWZLHXg/+IeKeOmxZa8z/nzSmmv56V4QFjhgqsGaHD3e/YEeBF7dqn6wBJmOhonxSoRITAP1kRAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d04e85cd86540a506c07e7a60d93035958e923c5d3d90e49fb7c57c45956ad8b","last_reissued_at":"2026-05-18T03:17:34.736068Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:17:34.736068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.6761","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":"2026-05-18T03:17:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ywsEmnjxmvXrZol4SfFG1A8ME/t3+/gZoG7VyVRqSyYDybU9LypfME91l4shlXG3/wSR6QCy+0zvPRPTizeoAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:12:42.428097Z"},"content_sha256":"5a9ff7a361ab4d8db3dd8e4d8b3cdafc9b3882934719e57fd9425f95dfdbbd46","schema_version":"1.0","event_id":"sha256:5a9ff7a361ab4d8db3dd8e4d8b3cdafc9b3882934719e57fd9425f95dfdbbd46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:2BHILTMGKQFFA3AH46TA3EYDLF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical frequency comb generation from aluminum nitride micro-ring resonator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Chi Xiong, Hojoong Jung, Hong X. Tang, King Y. Fong, Xufeng Zhang","submitted_at":"2013-07-25T14:47:05Z","abstract_excerpt":"Aluminum nitride is an appealing nonlinear optical material for on-chip wavelength conversion. Here we report optical frequency comb generation from high quality factor aluminum nitride micro-ring resonators integrated on silicon substrates. By engineering the waveguide structure to achieve near-zero dispersion at telecommunication wavelengths and optimizing the phase matching for four-wave mixing, frequency combs are generated with a single wavelength continuous-wave pump laser. The Kerr coefficient (n2) of aluminum nitride is further extracted from our experimental results."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6761","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":"2026-05-18T03:17:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ryJTUBHeLGRdRo7GYYWN7DcbxAAmlGvXl3pMZe++WuB2jV5hk0H6lMSHSw0DoTFC5cbbRJiTMow74doln+ZNDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:12:42.428817Z"},"content_sha256":"ec1c0e9fe07608dd4fb50b9ac0b530fbf8dea90343983f37fe91015526c5c4fd","schema_version":"1.0","event_id":"sha256:ec1c0e9fe07608dd4fb50b9ac0b530fbf8dea90343983f37fe91015526c5c4fd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2BHILTMGKQFFA3AH46TA3EYDLF/bundle.json","state_url":"https://pith.science/pith/2BHILTMGKQFFA3AH46TA3EYDLF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2BHILTMGKQFFA3AH46TA3EYDLF/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":"2026-05-18T23:12:42Z","links":{"resolver":"https://pith.science/pith/2BHILTMGKQFFA3AH46TA3EYDLF","bundle":"https://pith.science/pith/2BHILTMGKQFFA3AH46TA3EYDLF/bundle.json","state":"https://pith.science/pith/2BHILTMGKQFFA3AH46TA3EYDLF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2BHILTMGKQFFA3AH46TA3EYDLF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:2BHILTMGKQFFA3AH46TA3EYDLF","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":"5c9cdf60edf4e0643d384d743a48c42c2665ee2f683add6b4f6d9a58962f889b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-07-25T14:47:05Z","title_canon_sha256":"c55619df16dc39fa9748ed1e3308a1a6a435a83000277aa525bce65ed3fe26b2"},"schema_version":"1.0","source":{"id":"1307.6761","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.6761","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"arxiv_version","alias_value":"1307.6761v1","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.6761","created_at":"2026-05-18T03:17:34Z"},{"alias_kind":"pith_short_12","alias_value":"2BHILTMGKQFF","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"2BHILTMGKQFFA3AH","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"2BHILTMG","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:ec1c0e9fe07608dd4fb50b9ac0b530fbf8dea90343983f37fe91015526c5c4fd","target":"graph","created_at":"2026-05-18T03:17:34Z","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":"Aluminum nitride is an appealing nonlinear optical material for on-chip wavelength conversion. Here we report optical frequency comb generation from high quality factor aluminum nitride micro-ring resonators integrated on silicon substrates. By engineering the waveguide structure to achieve near-zero dispersion at telecommunication wavelengths and optimizing the phase matching for four-wave mixing, frequency combs are generated with a single wavelength continuous-wave pump laser. The Kerr coefficient (n2) of aluminum nitride is further extracted from our experimental results.","authors_text":"Chi Xiong, Hojoong Jung, Hong X. Tang, King Y. Fong, Xufeng Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-07-25T14:47:05Z","title":"Optical frequency comb generation from aluminum nitride micro-ring resonator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.6761","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":"sha256:5a9ff7a361ab4d8db3dd8e4d8b3cdafc9b3882934719e57fd9425f95dfdbbd46","target":"record","created_at":"2026-05-18T03:17:34Z","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":"5c9cdf60edf4e0643d384d743a48c42c2665ee2f683add6b4f6d9a58962f889b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-07-25T14:47:05Z","title_canon_sha256":"c55619df16dc39fa9748ed1e3308a1a6a435a83000277aa525bce65ed3fe26b2"},"schema_version":"1.0","source":{"id":"1307.6761","kind":"arxiv","version":1}},"canonical_sha256":"d04e85cd86540a506c07e7a60d93035958e923c5d3d90e49fb7c57c45956ad8b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d04e85cd86540a506c07e7a60d93035958e923c5d3d90e49fb7c57c45956ad8b","first_computed_at":"2026-05-18T03:17:34.736068Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:17:34.736068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"75Ug/ATVr4DWZLHXg/+IeKeOmxZa8z/nzSmmv56V4QFjhgqsGaHD3e/YEeBF7dqn6wBJmOhonxSoRITAP1kRAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:17:34.736525Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.6761","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a9ff7a361ab4d8db3dd8e4d8b3cdafc9b3882934719e57fd9425f95dfdbbd46","sha256:ec1c0e9fe07608dd4fb50b9ac0b530fbf8dea90343983f37fe91015526c5c4fd"],"state_sha256":"743098f6e71a4c4ca670f2803963c73c948d430070700d2647932e8320e94b29"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BBTvmx+1MnNsCT6A2TWmNLPnZhu2AQbqpvw5iik4aHBaFdG3+FlB08DfblwRI7PqCIsyGtTQUT1THv2OldXBAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T23:12:42.432145Z","bundle_sha256":"ebf1571abe2f4177d2bc1224a709813bbde6bd17156fdc43090d96bdc628b27d"}}