{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:ECDJ723AIVFVP32AQXBIB5ZPFQ","short_pith_number":"pith:ECDJ723A","canonical_record":{"source":{"id":"1007.1169","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-07-07T15:41:37Z","cross_cats_sorted":[],"title_canon_sha256":"235e1fec472e1bdda15297c2eaede47f7668e3b5222ac131ca15d6bbcc0bece9","abstract_canon_sha256":"192a35991c70b0d9b91e28cbbc2cc8044022a6fab5b511abb7840510e7ceada2"},"schema_version":"1.0"},"canonical_sha256":"20869feb60454b57ef4085c280f72f2c1f1fe0ca6aa2a638cec5c70bc3d53d47","source":{"kind":"arxiv","id":"1007.1169","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.1169","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1007.1169v1","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.1169","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"ECDJ723AIVFV","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"ECDJ723AIVFVP32A","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"ECDJ723A","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:ECDJ723AIVFVP32AQXBIB5ZPFQ","target":"record","payload":{"canonical_record":{"source":{"id":"1007.1169","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-07-07T15:41:37Z","cross_cats_sorted":[],"title_canon_sha256":"235e1fec472e1bdda15297c2eaede47f7668e3b5222ac131ca15d6bbcc0bece9","abstract_canon_sha256":"192a35991c70b0d9b91e28cbbc2cc8044022a6fab5b511abb7840510e7ceada2"},"schema_version":"1.0"},"canonical_sha256":"20869feb60454b57ef4085c280f72f2c1f1fe0ca6aa2a638cec5c70bc3d53d47","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:31.476358Z","signature_b64":"xcQ+G24ioT4yE2hpUtPgrMwl1g3iEgOOZmQi1V8F9ctag7QSstxf3rVkgnmlsIulBr5nIHOZuFH350s0ULNlCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"20869feb60454b57ef4085c280f72f2c1f1fe0ca6aa2a638cec5c70bc3d53d47","last_reissued_at":"2026-05-18T02:06:31.475709Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:31.475709Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.1169","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":"2026-05-18T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DFCUcdU9hhIdXZPwYi65HFmH7v3s1nNXUWq4oiGlyOrXHKpG+teDcHcg1NdRMNtu201JaKBto9fnVTiBQcV5CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:21:36.973133Z"},"content_sha256":"5b8476e1bd571357a2039bf279ade8cbf8f7476df1e16867ad94fb97f339d987","schema_version":"1.0","event_id":"sha256:5b8476e1bd571357a2039bf279ade8cbf8f7476df1e16867ad94fb97f339d987"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:ECDJ723AIVFVP32AQXBIB5ZPFQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Eight-channel reconfigurable microring filters with tunable frequency, extinction ratio and bandwidth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Hao Shen, Jing Ouyang, Leo T. Varghese, Li Fan, Lin Zhao, Maroof H. Khan, Minghao Qi, Yi Xuan","submitted_at":"2010-07-07T15:41:37Z","abstract_excerpt":"We demonstrate an eight-channel reconfigurable optical filter on a silicon chip consisting of cascaded microring resonators and integrated compact heaters. With an embedded Mach-Zehnder (MZ) arm coupling to a microring resonator, the important parameters of a filter such as center frequency, extinction ratio and bandwidth can be controlled simultaneously for purposes of filtering, routing and spectral shaping, thus making our method potentially useful in dense wavelength division multiplexing (DWDM) and radio frequency arbitrary waveform generation (RFAWG). Multichannel filter response was suc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.1169","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":"2026-05-18T02:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9xgIhd3v2pi0rmIdi4uTCkNR+Ut5ZMBrBmIL8C2fpmqW7qqkViq0+YliXr05iCdCq4M0EISPEKI32lLFecWzDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:21:36.973533Z"},"content_sha256":"d4032d3ce2be94d8a0abfa594a204297b309dd3074a1209df8c000bbe8aeb8e9","schema_version":"1.0","event_id":"sha256:d4032d3ce2be94d8a0abfa594a204297b309dd3074a1209df8c000bbe8aeb8e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/bundle.json","state_url":"https://pith.science/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/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":"2026-05-28T20:21:36Z","links":{"resolver":"https://pith.science/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ","bundle":"https://pith.science/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/bundle.json","state":"https://pith.science/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ECDJ723AIVFVP32AQXBIB5ZPFQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:ECDJ723AIVFVP32AQXBIB5ZPFQ","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":"192a35991c70b0d9b91e28cbbc2cc8044022a6fab5b511abb7840510e7ceada2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-07-07T15:41:37Z","title_canon_sha256":"235e1fec472e1bdda15297c2eaede47f7668e3b5222ac131ca15d6bbcc0bece9"},"schema_version":"1.0","source":{"id":"1007.1169","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.1169","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1007.1169v1","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.1169","created_at":"2026-05-18T02:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"ECDJ723AIVFV","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"ECDJ723AIVFVP32A","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"ECDJ723A","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:d4032d3ce2be94d8a0abfa594a204297b309dd3074a1209df8c000bbe8aeb8e9","target":"graph","created_at":"2026-05-18T02:06:31Z","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":"We demonstrate an eight-channel reconfigurable optical filter on a silicon chip consisting of cascaded microring resonators and integrated compact heaters. With an embedded Mach-Zehnder (MZ) arm coupling to a microring resonator, the important parameters of a filter such as center frequency, extinction ratio and bandwidth can be controlled simultaneously for purposes of filtering, routing and spectral shaping, thus making our method potentially useful in dense wavelength division multiplexing (DWDM) and radio frequency arbitrary waveform generation (RFAWG). Multichannel filter response was suc","authors_text":"Hao Shen, Jing Ouyang, Leo T. Varghese, Li Fan, Lin Zhao, Maroof H. Khan, Minghao Qi, Yi Xuan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-07-07T15:41:37Z","title":"Eight-channel reconfigurable microring filters with tunable frequency, extinction ratio and bandwidth"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.1169","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":"sha256:5b8476e1bd571357a2039bf279ade8cbf8f7476df1e16867ad94fb97f339d987","target":"record","created_at":"2026-05-18T02:06:31Z","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":"192a35991c70b0d9b91e28cbbc2cc8044022a6fab5b511abb7840510e7ceada2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2010-07-07T15:41:37Z","title_canon_sha256":"235e1fec472e1bdda15297c2eaede47f7668e3b5222ac131ca15d6bbcc0bece9"},"schema_version":"1.0","source":{"id":"1007.1169","kind":"arxiv","version":1}},"canonical_sha256":"20869feb60454b57ef4085c280f72f2c1f1fe0ca6aa2a638cec5c70bc3d53d47","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"20869feb60454b57ef4085c280f72f2c1f1fe0ca6aa2a638cec5c70bc3d53d47","first_computed_at":"2026-05-18T02:06:31.475709Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:31.475709Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xcQ+G24ioT4yE2hpUtPgrMwl1g3iEgOOZmQi1V8F9ctag7QSstxf3rVkgnmlsIulBr5nIHOZuFH350s0ULNlCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:31.476358Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.1169","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b8476e1bd571357a2039bf279ade8cbf8f7476df1e16867ad94fb97f339d987","sha256:d4032d3ce2be94d8a0abfa594a204297b309dd3074a1209df8c000bbe8aeb8e9"],"state_sha256":"ec2f11d19c6570852f0c6a1ad5db9d179cfb8715454bf1627d392af0f7654267"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GExK0943gpqmhW4Di1zaFMA6nOe+pbl1GQb63VjP9LnUdooGinVPUp7zdpmqSvUQRAHQwTZT6AFsmhkluy2UBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:21:36.976122Z","bundle_sha256":"fe85bfe7588dae362420b42326719361f3fd2f7e5de3bd8b8d1f310ec418b95b"}}