{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:WF4WPAGC7CTHY3C7NTARPWHY3D","short_pith_number":"pith:WF4WPAGC","canonical_record":{"source":{"id":"2501.11811","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T01:19:01Z","cross_cats_sorted":[],"title_canon_sha256":"74be0fa3affd72494db3be1cd5f5931835d30597ce8da697a3c772ee7aca70ff","abstract_canon_sha256":"b0d3d22a512d82fdc1cfd47d3b51b8ecebebe8911ce42b5132b2940a77b7df50"},"schema_version":"1.0"},"canonical_sha256":"b1796780c2f8a67c6c5f6cc117d8f8d8dd05200e7e00060897671dec0216f0b2","source":{"kind":"arxiv","id":"2501.11811","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.11811","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"2501.11811v2","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.11811","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"WF4WPAGC7CTH","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"WF4WPAGC7CTHY3C7","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"WF4WPAGC","created_at":"2026-07-05T10:03:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:WF4WPAGC7CTHY3C7NTARPWHY3D","target":"record","payload":{"canonical_record":{"source":{"id":"2501.11811","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T01:19:01Z","cross_cats_sorted":[],"title_canon_sha256":"74be0fa3affd72494db3be1cd5f5931835d30597ce8da697a3c772ee7aca70ff","abstract_canon_sha256":"b0d3d22a512d82fdc1cfd47d3b51b8ecebebe8911ce42b5132b2940a77b7df50"},"schema_version":"1.0"},"canonical_sha256":"b1796780c2f8a67c6c5f6cc117d8f8d8dd05200e7e00060897671dec0216f0b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:03:51.872339Z","signature_b64":"Dr3qjeige5E8qVy1QAoqqmkySHFS8aUKgcqs7tVZRb+TDUWGKR1H41gGcjShLHIu5pZQ1KqDNXrKHAOc5W3fCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1796780c2f8a67c6c5f6cc117d8f8d8dd05200e7e00060897671dec0216f0b2","last_reissued_at":"2026-07-05T10:03:51.871805Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:03:51.871805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.11811","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":"2026-07-05T10:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nUf5mtn5JdwqdFLSP42WEGm9rqc1ScvLDgbs/HqGosvAwAK6I06NZcwaqkInmQ5hO8jaS0A4fEHtsx/f3CDLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T18:55:08.862236Z"},"content_sha256":"45528fccef90544ce6191f2b4be6bf7c5fca1745c2751357fa316554704bba8e","schema_version":"1.0","event_id":"sha256:45528fccef90544ce6191f2b4be6bf7c5fca1745c2751357fa316554704bba8e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:WF4WPAGC7CTHY3C7NTARPWHY3D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Universal programmable and self-configuring optical filter","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Anne R. Kroo, Carson G. Valdez, Charles Roques-Carmes, David A. B. Miller, Marek Vlk, Olav Solgaard, Shanhui Fan","submitted_at":"2025-01-21T01:19:01Z","abstract_excerpt":"We propose an approach to integrated optical spectral filtering that allows arbitrary programmability, can compensate automatically for imperfections in filter fabrication, allows multiple simultaneous and separately programmable filter functions on the same input, and can configure itself automatically to the problem of interest, for example to filter or reject multiple arbitrarily chosen frequencies. The approach exploits splitting the input light into an array of multiple waveguides of different lengths that then feed a programmable interferometer array that can also self-configure. It can "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.11811","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/2501.11811/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":"2026-07-05T10:03:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4uy/ppIxFdSTMPbC8JXoKNyszMffruD2jVJTBi9R7aCi/zLansu2OBrpuuhrFyUIiM3drhYyO1xko97r67HEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T18:55:08.862639Z"},"content_sha256":"e4a42604295e1c3cafd92ef840abf7793f95643808b561a0c404cb51b3a09cf7","schema_version":"1.0","event_id":"sha256:e4a42604295e1c3cafd92ef840abf7793f95643808b561a0c404cb51b3a09cf7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/bundle.json","state_url":"https://pith.science/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/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":"2026-08-07T18:55:08Z","links":{"resolver":"https://pith.science/pith/WF4WPAGC7CTHY3C7NTARPWHY3D","bundle":"https://pith.science/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/bundle.json","state":"https://pith.science/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WF4WPAGC7CTHY3C7NTARPWHY3D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:WF4WPAGC7CTHY3C7NTARPWHY3D","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":"b0d3d22a512d82fdc1cfd47d3b51b8ecebebe8911ce42b5132b2940a77b7df50","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T01:19:01Z","title_canon_sha256":"74be0fa3affd72494db3be1cd5f5931835d30597ce8da697a3c772ee7aca70ff"},"schema_version":"1.0","source":{"id":"2501.11811","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.11811","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"arxiv_version","alias_value":"2501.11811v2","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.11811","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_12","alias_value":"WF4WPAGC7CTH","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_16","alias_value":"WF4WPAGC7CTHY3C7","created_at":"2026-07-05T10:03:51Z"},{"alias_kind":"pith_short_8","alias_value":"WF4WPAGC","created_at":"2026-07-05T10:03:51Z"}],"graph_snapshots":[{"event_id":"sha256:e4a42604295e1c3cafd92ef840abf7793f95643808b561a0c404cb51b3a09cf7","target":"graph","created_at":"2026-07-05T10:03:51Z","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/2501.11811/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose an approach to integrated optical spectral filtering that allows arbitrary programmability, can compensate automatically for imperfections in filter fabrication, allows multiple simultaneous and separately programmable filter functions on the same input, and can configure itself automatically to the problem of interest, for example to filter or reject multiple arbitrarily chosen frequencies. The approach exploits splitting the input light into an array of multiple waveguides of different lengths that then feed a programmable interferometer array that can also self-configure. It can ","authors_text":"Anne R. Kroo, Carson G. Valdez, Charles Roques-Carmes, David A. B. Miller, Marek Vlk, Olav Solgaard, Shanhui Fan","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T01:19:01Z","title":"Universal programmable and self-configuring optical filter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.11811","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":"sha256:45528fccef90544ce6191f2b4be6bf7c5fca1745c2751357fa316554704bba8e","target":"record","created_at":"2026-07-05T10:03:51Z","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":"b0d3d22a512d82fdc1cfd47d3b51b8ecebebe8911ce42b5132b2940a77b7df50","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T01:19:01Z","title_canon_sha256":"74be0fa3affd72494db3be1cd5f5931835d30597ce8da697a3c772ee7aca70ff"},"schema_version":"1.0","source":{"id":"2501.11811","kind":"arxiv","version":2}},"canonical_sha256":"b1796780c2f8a67c6c5f6cc117d8f8d8dd05200e7e00060897671dec0216f0b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1796780c2f8a67c6c5f6cc117d8f8d8dd05200e7e00060897671dec0216f0b2","first_computed_at":"2026-07-05T10:03:51.871805Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:03:51.871805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dr3qjeige5E8qVy1QAoqqmkySHFS8aUKgcqs7tVZRb+TDUWGKR1H41gGcjShLHIu5pZQ1KqDNXrKHAOc5W3fCw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:03:51.872339Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.11811","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45528fccef90544ce6191f2b4be6bf7c5fca1745c2751357fa316554704bba8e","sha256:e4a42604295e1c3cafd92ef840abf7793f95643808b561a0c404cb51b3a09cf7"],"state_sha256":"772376ddb61bf5b1caef5d810233bad641a3183564eb56bed5293afbb06c5ef2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3swZxROrLus4Vy0/FJRnSQtmZzmsK258sP8n1b9BNq7nrFHAOYjH+3kTmMfdEhoudRLwY6tr14zS1SQu3ZnDBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T18:55:08.865703Z","bundle_sha256":"c765503d5e71f8e0eedbac9e1bca004b0cb6f7a8c7889415a2fcf9099a7f8be9"}}