{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:D6NOIWFMPNXMJLDAHE3JNGQFWW","short_pith_number":"pith:D6NOIWFM","canonical_record":{"source":{"id":"2102.04129","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-08T11:10:06Z","cross_cats_sorted":[],"title_canon_sha256":"b1732dfebb9fab7f05db5bf8f02b4e0ee7b495ed6c848d8de23cb3c466b6d2a7","abstract_canon_sha256":"6aa91f14a1205c332d9b0d0380d79535aba34f907c5e544a709d1997a18ff05b"},"schema_version":"1.0"},"canonical_sha256":"1f9ae458ac7b6ec4ac603936969a05b5a5094145fdcb967391d00b55e162f4f5","source":{"kind":"arxiv","id":"2102.04129","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.04129","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"arxiv_version","alias_value":"2102.04129v1","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.04129","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_12","alias_value":"D6NOIWFMPNXM","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_16","alias_value":"D6NOIWFMPNXMJLDA","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_8","alias_value":"D6NOIWFM","created_at":"2026-07-05T02:13:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:D6NOIWFMPNXMJLDAHE3JNGQFWW","target":"record","payload":{"canonical_record":{"source":{"id":"2102.04129","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-08T11:10:06Z","cross_cats_sorted":[],"title_canon_sha256":"b1732dfebb9fab7f05db5bf8f02b4e0ee7b495ed6c848d8de23cb3c466b6d2a7","abstract_canon_sha256":"6aa91f14a1205c332d9b0d0380d79535aba34f907c5e544a709d1997a18ff05b"},"schema_version":"1.0"},"canonical_sha256":"1f9ae458ac7b6ec4ac603936969a05b5a5094145fdcb967391d00b55e162f4f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:13:30.402641Z","signature_b64":"pmCVPAqlUAAT40RRq79cETuAHO8KKTJ7bsdHnZRB+RLc1d4WJ+GKEqj3uvDr5+yjbcavo8jbmWzeZGi4HYjWAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f9ae458ac7b6ec4ac603936969a05b5a5094145fdcb967391d00b55e162f4f5","last_reissued_at":"2026-07-05T02:13:30.402212Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:13:30.402212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.04129","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":"2026-07-05T02:13:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pm1IK/To2QhbXlEdgtEJM1V7WWV1yoPLWjT/WS/ndShAW9wM078MiSOwOwv+BuDd3nm437dcJMmHCXgpRPIVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T12:22:52.312185Z"},"content_sha256":"cb7925bc10402c3e862674faa67fb3dfe6b0028215a87e743e856970aad53260","schema_version":"1.0","event_id":"sha256:cb7925bc10402c3e862674faa67fb3dfe6b0028215a87e743e856970aad53260"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:D6NOIWFMPNXMJLDAHE3JNGQFWW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Narrow Linewidth near-UV InGaN Laser Diode based on External Cavity Fiber Bragg Grating","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Antoine Congar, Dominique Mammez, Georges Perin, Jean-Claude Simon, Julien Rouvillain, Laurent Lablonde, Mathilde Gay, Pascal Besnard, St\\'ephane Trebaol, Thierry Georges, Thierry Robin","submitted_at":"2021-02-08T11:10:06Z","abstract_excerpt":"We realize a fiber Bragg grating InGaN based laser diode emitting at 400 nm and demonstrate its high coherency. Thanks to the fabrication of a narrow band fiber Bragg grating in the near-UV, we can reach single-mode and single-frequency regimes for the self-injection locked diode. The device exhibits 44 dB side-mode-suppression-ratio and mW output power. Detailed frequency noise analysis reveals sub-MHz integrated linewidth and 16 kHz intrinsic linewidth. Such a narrow linewidth laser diode in the near-UV domain with a compact and low-cost design could find applications whenever coherency and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.04129","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2102.04129/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":"2026-07-05T02:13:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jHXiRc3x9uIGZ1oLO+vaNZh8k9f97O4sGvNCOg6z+RuuNXcvHAOY4M10cBrFcsPlHKDcwCYou9IgsTBb+1jPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T12:22:52.312750Z"},"content_sha256":"e40ade15589735c53c16d89983f14895b48026f0de34e6f069d262580b13c6af","schema_version":"1.0","event_id":"sha256:e40ade15589735c53c16d89983f14895b48026f0de34e6f069d262580b13c6af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/bundle.json","state_url":"https://pith.science/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/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":"2026-08-23T12:22:52Z","links":{"resolver":"https://pith.science/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW","bundle":"https://pith.science/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/bundle.json","state":"https://pith.science/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D6NOIWFMPNXMJLDAHE3JNGQFWW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:D6NOIWFMPNXMJLDAHE3JNGQFWW","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":"6aa91f14a1205c332d9b0d0380d79535aba34f907c5e544a709d1997a18ff05b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-08T11:10:06Z","title_canon_sha256":"b1732dfebb9fab7f05db5bf8f02b4e0ee7b495ed6c848d8de23cb3c466b6d2a7"},"schema_version":"1.0","source":{"id":"2102.04129","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.04129","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"arxiv_version","alias_value":"2102.04129v1","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.04129","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_12","alias_value":"D6NOIWFMPNXM","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_16","alias_value":"D6NOIWFMPNXMJLDA","created_at":"2026-07-05T02:13:30Z"},{"alias_kind":"pith_short_8","alias_value":"D6NOIWFM","created_at":"2026-07-05T02:13:30Z"}],"graph_snapshots":[{"event_id":"sha256:e40ade15589735c53c16d89983f14895b48026f0de34e6f069d262580b13c6af","target":"graph","created_at":"2026-07-05T02:13:30Z","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/2102.04129/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We realize a fiber Bragg grating InGaN based laser diode emitting at 400 nm and demonstrate its high coherency. Thanks to the fabrication of a narrow band fiber Bragg grating in the near-UV, we can reach single-mode and single-frequency regimes for the self-injection locked diode. The device exhibits 44 dB side-mode-suppression-ratio and mW output power. Detailed frequency noise analysis reveals sub-MHz integrated linewidth and 16 kHz intrinsic linewidth. Such a narrow linewidth laser diode in the near-UV domain with a compact and low-cost design could find applications whenever coherency and ","authors_text":"Antoine Congar, Dominique Mammez, Georges Perin, Jean-Claude Simon, Julien Rouvillain, Laurent Lablonde, Mathilde Gay, Pascal Besnard, St\\'ephane Trebaol, Thierry Georges, Thierry Robin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-08T11:10:06Z","title":"Narrow Linewidth near-UV InGaN Laser Diode based on External Cavity Fiber Bragg Grating"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.04129","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:cb7925bc10402c3e862674faa67fb3dfe6b0028215a87e743e856970aad53260","target":"record","created_at":"2026-07-05T02:13:30Z","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":"6aa91f14a1205c332d9b0d0380d79535aba34f907c5e544a709d1997a18ff05b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-08T11:10:06Z","title_canon_sha256":"b1732dfebb9fab7f05db5bf8f02b4e0ee7b495ed6c848d8de23cb3c466b6d2a7"},"schema_version":"1.0","source":{"id":"2102.04129","kind":"arxiv","version":1}},"canonical_sha256":"1f9ae458ac7b6ec4ac603936969a05b5a5094145fdcb967391d00b55e162f4f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f9ae458ac7b6ec4ac603936969a05b5a5094145fdcb967391d00b55e162f4f5","first_computed_at":"2026-07-05T02:13:30.402212Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:13:30.402212Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pmCVPAqlUAAT40RRq79cETuAHO8KKTJ7bsdHnZRB+RLc1d4WJ+GKEqj3uvDr5+yjbcavo8jbmWzeZGi4HYjWAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:13:30.402641Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.04129","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb7925bc10402c3e862674faa67fb3dfe6b0028215a87e743e856970aad53260","sha256:e40ade15589735c53c16d89983f14895b48026f0de34e6f069d262580b13c6af"],"state_sha256":"0a14f401009f1e756125df22c8503de673576b6082d81538572b1855c89d6908"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/WCybguhD2mVMpp58jPxicrINCEZxDodzxwK3vYLYB6f41aJqlA3C9Ruka/I7JOfN6OykJdx6vjHq4lI0J7wCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T12:22:52.318212Z","bundle_sha256":"917ee2ea11b705861dd45ad93e3c96c8e19a2fe53ed447703359254d7533bdb7"}}