{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2GJXUT3PPXOOYLWCVUVHPHECP7","short_pith_number":"pith:2GJXUT3P","canonical_record":{"source":{"id":"2109.04794","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2021-09-10T11:19:35Z","cross_cats_sorted":[],"title_canon_sha256":"651fc1d2da0d0e6ece9c8a226725d843a4f120f68c2ce772ea94d5377bc5842d","abstract_canon_sha256":"605cfa4e3ad002c9ff134dd61f11491a16b989ea8772670669eadd7c4d9ac870"},"schema_version":"1.0"},"canonical_sha256":"d1937a4f6f7ddcec2ec2ad2a779c827fcbe4d821ec6764299a609731ede1156d","source":{"kind":"arxiv","id":"2109.04794","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.04794","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"arxiv_version","alias_value":"2109.04794v1","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.04794","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_12","alias_value":"2GJXUT3PPXOO","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_16","alias_value":"2GJXUT3PPXOOYLWC","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_8","alias_value":"2GJXUT3P","created_at":"2026-07-05T03:47:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2GJXUT3PPXOOYLWCVUVHPHECP7","target":"record","payload":{"canonical_record":{"source":{"id":"2109.04794","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2021-09-10T11:19:35Z","cross_cats_sorted":[],"title_canon_sha256":"651fc1d2da0d0e6ece9c8a226725d843a4f120f68c2ce772ea94d5377bc5842d","abstract_canon_sha256":"605cfa4e3ad002c9ff134dd61f11491a16b989ea8772670669eadd7c4d9ac870"},"schema_version":"1.0"},"canonical_sha256":"d1937a4f6f7ddcec2ec2ad2a779c827fcbe4d821ec6764299a609731ede1156d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:47:23.994750Z","signature_b64":"Tl3tJ6PWKu5GFLbRXVb54xK39ogfxCfe+A3lXaLvxRnZF/INycbjIW6mNLPaOnidReskzi1eStzLW5dvijpVCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1937a4f6f7ddcec2ec2ad2a779c827fcbe4d821ec6764299a609731ede1156d","last_reissued_at":"2026-07-05T03:47:23.994307Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:47:23.994307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.04794","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":"2026-07-05T03:47:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0O8DbYmLet4VqobuYpyYe1a1Q9nKTBMk83oTXoWDoBWIhHqhmlOBk9+6Oj2JMo2JMgGBqI6fFCduPZKiF/YNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:25:19.954382Z"},"content_sha256":"a8ef8815a0c589d61ab5ee84fd90ad960f5545d63d68bb166eab9e71198248b9","schema_version":"1.0","event_id":"sha256:a8ef8815a0c589d61ab5ee84fd90ad960f5545d63d68bb166eab9e71198248b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2GJXUT3PPXOOYLWCVUVHPHECP7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Temperature-Dependent Group Delay of Photonic-Bandgap Hollow-Core Fiber Tuned by Surface-Mode Coupling","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Fei Yu, Jonathan Knight, Lili Hu, Meng Wang, Yazhou Wang, Ying Han, Zhengran Li","submitted_at":"2021-09-10T11:19:35Z","abstract_excerpt":"Surface modes (SM) are highly spatially localized modes existing at the core-cladding interface of photonic-bandgap hollow-core fiber (PBG-HCF). When coupling with SM, the air modes (AM) in the core would suffer a higher loss despite being spectrally within the cladding photonic bandgap, and would be highly dispersive around the avoided crossing (anti-crossing) wavelength. In this paper, we numerically demonstrate that such avoided crossings can play an important role in the tuning of the temperature dependence of group delay of AM of PBG-HCF. At higher temperatures, both the thermal-optic eff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.04794","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/2109.04794/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":"2026-07-05T03:47:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3XBm9+9u9HTEcmzv8pbKyMecPrruo0e7OZ3py0KuwYrTOXnvi/cynbjTLOIu3AqmZmHzh0ISsHTPjEXVXSCVAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:25:19.962801Z"},"content_sha256":"e72f8b0a95fd6c1c7137be38758e5efcb7055ea2f1ae8a9ac0dc625f66a9644c","schema_version":"1.0","event_id":"sha256:e72f8b0a95fd6c1c7137be38758e5efcb7055ea2f1ae8a9ac0dc625f66a9644c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/bundle.json","state_url":"https://pith.science/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/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":"2026-08-17T16:25:20Z","links":{"resolver":"https://pith.science/pith/2GJXUT3PPXOOYLWCVUVHPHECP7","bundle":"https://pith.science/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/bundle.json","state":"https://pith.science/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2GJXUT3PPXOOYLWCVUVHPHECP7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2GJXUT3PPXOOYLWCVUVHPHECP7","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":"605cfa4e3ad002c9ff134dd61f11491a16b989ea8772670669eadd7c4d9ac870","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2021-09-10T11:19:35Z","title_canon_sha256":"651fc1d2da0d0e6ece9c8a226725d843a4f120f68c2ce772ea94d5377bc5842d"},"schema_version":"1.0","source":{"id":"2109.04794","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.04794","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"arxiv_version","alias_value":"2109.04794v1","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.04794","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_12","alias_value":"2GJXUT3PPXOO","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_16","alias_value":"2GJXUT3PPXOOYLWC","created_at":"2026-07-05T03:47:23Z"},{"alias_kind":"pith_short_8","alias_value":"2GJXUT3P","created_at":"2026-07-05T03:47:23Z"}],"graph_snapshots":[{"event_id":"sha256:e72f8b0a95fd6c1c7137be38758e5efcb7055ea2f1ae8a9ac0dc625f66a9644c","target":"graph","created_at":"2026-07-05T03:47:23Z","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/2109.04794/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Surface modes (SM) are highly spatially localized modes existing at the core-cladding interface of photonic-bandgap hollow-core fiber (PBG-HCF). When coupling with SM, the air modes (AM) in the core would suffer a higher loss despite being spectrally within the cladding photonic bandgap, and would be highly dispersive around the avoided crossing (anti-crossing) wavelength. In this paper, we numerically demonstrate that such avoided crossings can play an important role in the tuning of the temperature dependence of group delay of AM of PBG-HCF. At higher temperatures, both the thermal-optic eff","authors_text":"Fei Yu, Jonathan Knight, Lili Hu, Meng Wang, Yazhou Wang, Ying Han, Zhengran Li","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2021-09-10T11:19:35Z","title":"Temperature-Dependent Group Delay of Photonic-Bandgap Hollow-Core Fiber Tuned by Surface-Mode Coupling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.04794","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:a8ef8815a0c589d61ab5ee84fd90ad960f5545d63d68bb166eab9e71198248b9","target":"record","created_at":"2026-07-05T03:47:23Z","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":"605cfa4e3ad002c9ff134dd61f11491a16b989ea8772670669eadd7c4d9ac870","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"physics.optics","submitted_at":"2021-09-10T11:19:35Z","title_canon_sha256":"651fc1d2da0d0e6ece9c8a226725d843a4f120f68c2ce772ea94d5377bc5842d"},"schema_version":"1.0","source":{"id":"2109.04794","kind":"arxiv","version":1}},"canonical_sha256":"d1937a4f6f7ddcec2ec2ad2a779c827fcbe4d821ec6764299a609731ede1156d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1937a4f6f7ddcec2ec2ad2a779c827fcbe4d821ec6764299a609731ede1156d","first_computed_at":"2026-07-05T03:47:23.994307Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:47:23.994307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Tl3tJ6PWKu5GFLbRXVb54xK39ogfxCfe+A3lXaLvxRnZF/INycbjIW6mNLPaOnidReskzi1eStzLW5dvijpVCg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:47:23.994750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.04794","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8ef8815a0c589d61ab5ee84fd90ad960f5545d63d68bb166eab9e71198248b9","sha256:e72f8b0a95fd6c1c7137be38758e5efcb7055ea2f1ae8a9ac0dc625f66a9644c"],"state_sha256":"b2922efe8c37dab2c420909761dba08deb958e963046cc01494589d933d46719"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O5EuUlmJ8ke+CLT8H28SJSxpwuVyAjnVAhqJzIDkSLFVZ4cmXsR2jhPuKExEpjAjJ4r1DxHD2qWjzc4i3oE7Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T16:25:20.004979Z","bundle_sha256":"7d288840f436ae2a8222b8f907817389c3702bb9ec6dcb88c7664f8d8b928ec0"}}