{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:EFP7RAFL5MXUGTNDVB2HQEBF75","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":"4db1cc9cde5f25289cb5f86abcdfa6f4cd2572010a3436d74ee2599a0a467fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-09-23T14:46:59Z","title_canon_sha256":"f3b0f010096460fd6317fee6249573eef85669f119e70470bb9f07c4251599fa"},"schema_version":"1.0","source":{"id":"2009.11184","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.11184","created_at":"2026-07-05T01:37:37Z"},{"alias_kind":"arxiv_version","alias_value":"2009.11184v1","created_at":"2026-07-05T01:37:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.11184","created_at":"2026-07-05T01:37:37Z"},{"alias_kind":"pith_short_12","alias_value":"EFP7RAFL5MXU","created_at":"2026-07-05T01:37:37Z"},{"alias_kind":"pith_short_16","alias_value":"EFP7RAFL5MXUGTND","created_at":"2026-07-05T01:37:37Z"},{"alias_kind":"pith_short_8","alias_value":"EFP7RAFL","created_at":"2026-07-05T01:37:37Z"}],"graph_snapshots":[{"event_id":"sha256:51385f98864e520ca48431c2f72943fa43d2e0b1783382a74a95bec58aaa2f90","target":"graph","created_at":"2026-07-05T01:37:37Z","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/2009.11184/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We review some currently discussed solutions for 400 Gbit/s inter-data center WDM transmission for up to 100 km. We focus on direct detected solutions, namely PAM4 and DMT, and present two WDM systems based on these formats.","authors_text":"Annika Dochhan, Helmut Grie{\\ss}er, Idelfonso Tafur Monroy, J\\\"org-Peter Elbers, Juan Jos\\'e Vegas Olmos, Michael Eiselt, Nicklas Eiselt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-09-23T14:46:59Z","title":"Solutions for 400 Gbit/s Inter Data Center WDM Transmission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.11184","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":"sha256:7428b0daddbbdff50f9a7aa044ea597ef2a51e7ee84c62dcfd7c70d835779cff","target":"record","created_at":"2026-07-05T01:37:37Z","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":"4db1cc9cde5f25289cb5f86abcdfa6f4cd2572010a3436d74ee2599a0a467fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2020-09-23T14:46:59Z","title_canon_sha256":"f3b0f010096460fd6317fee6249573eef85669f119e70470bb9f07c4251599fa"},"schema_version":"1.0","source":{"id":"2009.11184","kind":"arxiv","version":1}},"canonical_sha256":"215ff880abeb2f434da3a874781025ff4bf8aebfd23c0e052509fb8a124d1e98","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"215ff880abeb2f434da3a874781025ff4bf8aebfd23c0e052509fb8a124d1e98","first_computed_at":"2026-07-05T01:37:37.034424Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:37:37.034424Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HHfNs2fSbyJZThChOfyWXzA8fnx6VdjXxrJUqh/1zsArDEMvSAOVV3bKs4nElSu8CoupC4+phms0phP7rgiwBg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:37:37.034875Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.11184","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7428b0daddbbdff50f9a7aa044ea597ef2a51e7ee84c62dcfd7c70d835779cff","sha256:51385f98864e520ca48431c2f72943fa43d2e0b1783382a74a95bec58aaa2f90"],"state_sha256":"fd92cbd045932bc5232884fd6bc57d287f220a194f4aef964678797f61d78647"}