{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:SRG2A2S7GCIFLYFL5GE2D5W5X4","short_pith_number":"pith:SRG2A2S7","canonical_record":{"source":{"id":"1805.04089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-05-10T17:44:56Z","cross_cats_sorted":[],"title_canon_sha256":"69c7d18122c877dbc2adcc9580a288b037e9792b55a757c61686e101c0e846d0","abstract_canon_sha256":"e01661cf2f816ff058d122b2b31f82127171d31931c2496c8bbcb2b2533c7d66"},"schema_version":"1.0"},"canonical_sha256":"944da06a5f309055e0abe989a1f6ddbf3280e112fe58680696909c5eb4bc7dcb","source":{"kind":"arxiv","id":"1805.04089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.04089","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"1805.04089v1","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.04089","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"SRG2A2S7GCIF","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SRG2A2S7GCIFLYFL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SRG2A2S7","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:SRG2A2S7GCIFLYFL5GE2D5W5X4","target":"record","payload":{"canonical_record":{"source":{"id":"1805.04089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-05-10T17:44:56Z","cross_cats_sorted":[],"title_canon_sha256":"69c7d18122c877dbc2adcc9580a288b037e9792b55a757c61686e101c0e846d0","abstract_canon_sha256":"e01661cf2f816ff058d122b2b31f82127171d31931c2496c8bbcb2b2533c7d66"},"schema_version":"1.0"},"canonical_sha256":"944da06a5f309055e0abe989a1f6ddbf3280e112fe58680696909c5eb4bc7dcb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:07.330187Z","signature_b64":"H8q9m1RLfjrcHNt1AqhWtVWLXAZH5K7HcXx2EyTMUgku+NXl9R5ejI0gGJdCvI7XoThJXAYHRjARy0glAF8CAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"944da06a5f309055e0abe989a1f6ddbf3280e112fe58680696909c5eb4bc7dcb","last_reissued_at":"2026-05-18T00:07:07.329476Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:07.329476Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.04089","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":"2026-05-18T00:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OpcYZhgXPJ5bLbHErs6cW9zStuS/dCY7khs4d/MTdGvXKrM5/1YLpLeSN9EQ3RJbFg7aRAi2+DQx18hfEnnHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:58:46.098372Z"},"content_sha256":"45ec5179c65dfab0f7f4bff194004b9d669d378c76acf53ff4b4ebc7c872ef16","schema_version":"1.0","event_id":"sha256:45ec5179c65dfab0f7f4bff194004b9d669d378c76acf53ff4b4ebc7c872ef16"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:SRG2A2S7GCIFLYFL5GE2D5W5X4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dual-wavelength fiber Fabry-Perot cavities with engineered birefringence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Francesco Ferri, Jakob Reichel, Konstantin Ott, Romain Long, S\\'ebastien Garcia","submitted_at":"2018-05-10T17:44:56Z","abstract_excerpt":"We present a method to engineer the frequency splitting of polarization eigenmodes in fiber Fabry-Perot (FFP) cavities. Using specific pattern of multiple CO$_2$ laser pulses, we machine paraboloidal micromirrors with controlled elliptical shape in a large range of radius of curvature. This method is versatile and can be used to produce cavities with maximized or near-zero polarization mode splitting. In addition, we realize dual-wavelength FFP cavities with finesse exceeding $40\\,000$ at 780$\\,$nm and at 1559$\\,$nm in the telecom range. We provide direct evidence that the birefringent frequen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.04089","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":"2026-05-18T00:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lr+vNsyT5Qi1L2P4a2Btp7YSIIrNGoW2OYXlj2SvmroLW7FbjRqC9OlHC2Pz/Ju3i/DzXD5tneYH/6riEF+8CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:58:46.099014Z"},"content_sha256":"aa51266cfc9c35621e2c450192dbe8919e25523361ecb34ec246e925b8e8caae","schema_version":"1.0","event_id":"sha256:aa51266cfc9c35621e2c450192dbe8919e25523361ecb34ec246e925b8e8caae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/bundle.json","state_url":"https://pith.science/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/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":"2026-05-26T21:58:46Z","links":{"resolver":"https://pith.science/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4","bundle":"https://pith.science/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/bundle.json","state":"https://pith.science/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SRG2A2S7GCIFLYFL5GE2D5W5X4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SRG2A2S7GCIFLYFL5GE2D5W5X4","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":"e01661cf2f816ff058d122b2b31f82127171d31931c2496c8bbcb2b2533c7d66","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-05-10T17:44:56Z","title_canon_sha256":"69c7d18122c877dbc2adcc9580a288b037e9792b55a757c61686e101c0e846d0"},"schema_version":"1.0","source":{"id":"1805.04089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.04089","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"1805.04089v1","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.04089","created_at":"2026-05-18T00:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"SRG2A2S7GCIF","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SRG2A2S7GCIFLYFL","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SRG2A2S7","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:aa51266cfc9c35621e2c450192dbe8919e25523361ecb34ec246e925b8e8caae","target":"graph","created_at":"2026-05-18T00:07:07Z","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 present a method to engineer the frequency splitting of polarization eigenmodes in fiber Fabry-Perot (FFP) cavities. Using specific pattern of multiple CO$_2$ laser pulses, we machine paraboloidal micromirrors with controlled elliptical shape in a large range of radius of curvature. This method is versatile and can be used to produce cavities with maximized or near-zero polarization mode splitting. In addition, we realize dual-wavelength FFP cavities with finesse exceeding $40\\,000$ at 780$\\,$nm and at 1559$\\,$nm in the telecom range. We provide direct evidence that the birefringent frequen","authors_text":"Francesco Ferri, Jakob Reichel, Konstantin Ott, Romain Long, S\\'ebastien Garcia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-05-10T17:44:56Z","title":"Dual-wavelength fiber Fabry-Perot cavities with engineered birefringence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.04089","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":"sha256:45ec5179c65dfab0f7f4bff194004b9d669d378c76acf53ff4b4ebc7c872ef16","target":"record","created_at":"2026-05-18T00:07:07Z","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":"e01661cf2f816ff058d122b2b31f82127171d31931c2496c8bbcb2b2533c7d66","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-05-10T17:44:56Z","title_canon_sha256":"69c7d18122c877dbc2adcc9580a288b037e9792b55a757c61686e101c0e846d0"},"schema_version":"1.0","source":{"id":"1805.04089","kind":"arxiv","version":1}},"canonical_sha256":"944da06a5f309055e0abe989a1f6ddbf3280e112fe58680696909c5eb4bc7dcb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"944da06a5f309055e0abe989a1f6ddbf3280e112fe58680696909c5eb4bc7dcb","first_computed_at":"2026-05-18T00:07:07.329476Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:07.329476Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H8q9m1RLfjrcHNt1AqhWtVWLXAZH5K7HcXx2EyTMUgku+NXl9R5ejI0gGJdCvI7XoThJXAYHRjARy0glAF8CAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:07.330187Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.04089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45ec5179c65dfab0f7f4bff194004b9d669d378c76acf53ff4b4ebc7c872ef16","sha256:aa51266cfc9c35621e2c450192dbe8919e25523361ecb34ec246e925b8e8caae"],"state_sha256":"d98c1ba80707dd50bbd067111ce84363cbbe347c131ed69782d4ecd45e29c518"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VLR7TZWK1P97jArL3yGyh3zRuSqhGCG9XpDOBGDXpd8T0ng1SaPZQwATlvEkpDXlAfv/Hk7H7MWZrHt2w4gnCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:58:46.102407Z","bundle_sha256":"ee48efefd1d191bb98a9433895845f2a39d81bc7747d738c1b67ffed3b5a6f1e"}}