{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:QYS4OOMVDERUZXRGY7W5NCDFR7","short_pith_number":"pith:QYS4OOMV","canonical_record":{"source":{"id":"1607.01347","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-07-05T17:45:45Z","cross_cats_sorted":["physics.chem-ph","physics.ins-det"],"title_canon_sha256":"89bbaebb6ffd992879b1ce4f9e599bec9160156103ca9f9fb92e61f50c799b3f","abstract_canon_sha256":"e4a1199677213c99f90f8271715c238eeed200fe088548f1fe46c7fa4c2c062c"},"schema_version":"1.0"},"canonical_sha256":"8625c7399519234cde26c7edd688658fc41886cdace1ca23dc53537063ec112f","source":{"kind":"arxiv","id":"1607.01347","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01347","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01347v1","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01347","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"pith_short_12","alias_value":"QYS4OOMVDERU","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"QYS4OOMVDERUZXRG","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"QYS4OOMV","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:QYS4OOMVDERUZXRGY7W5NCDFR7","target":"record","payload":{"canonical_record":{"source":{"id":"1607.01347","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-07-05T17:45:45Z","cross_cats_sorted":["physics.chem-ph","physics.ins-det"],"title_canon_sha256":"89bbaebb6ffd992879b1ce4f9e599bec9160156103ca9f9fb92e61f50c799b3f","abstract_canon_sha256":"e4a1199677213c99f90f8271715c238eeed200fe088548f1fe46c7fa4c2c062c"},"schema_version":"1.0"},"canonical_sha256":"8625c7399519234cde26c7edd688658fc41886cdace1ca23dc53537063ec112f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:39.391361Z","signature_b64":"U4pzaSkuAXQks8TJayHz5itBtfL3MdEm/vyFQnl2gFiYUPYbGR79FjwQ3fG3NCTYCWXo+k8ky3U8rvGjBmAqBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8625c7399519234cde26c7edd688658fc41886cdace1ca23dc53537063ec112f","last_reissued_at":"2026-05-18T00:57:39.390789Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:39.390789Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.01347","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":"2026-05-18T00:57:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CSR8338diiEhDpsaYNXZG1M5+VsfXDrGoNZ8NZZH/6XxJWdRqpOTYGY0/6PTFFg1EMsdnmnHcPuOy1/y7K5AAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:45:04.448697Z"},"content_sha256":"2771d2d301fa25c953ca038775aecfe42d936dabcf0af3e3057ce471c7274ee0","schema_version":"1.0","event_id":"sha256:2771d2d301fa25c953ca038775aecfe42d936dabcf0af3e3057ce471c7274ee0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:QYS4OOMVDERUZXRGY7W5NCDFR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A low-temperature external cavity diode laser for broad wavelength tuning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph","physics.ins-det"],"primary_cat":"physics.atom-ph","authors_text":"Jason S. Rosenberg, Kang-Kuen Ni, Nicholas R. Hutzler, William G. Tobias","submitted_at":"2016-07-05T17:45:45Z","abstract_excerpt":"We report on the design and characterization of a low-temperature external cavity diode laser (ECDL) system for broad wavelength tuning. The performance achieved with multiple diode models addresses the scarcity of commercial red laser diodes below 633 nm, which is a wavelength range relevant to spectroscopy of many molecules and ions. Using a combination of multiple-stage thermoelectric cooling and water cooling, the operating temperature of a laser diode is lowered to -64{\\deg}C, more than 85{\\deg}C below the ambient temperature. The laser system integrates temperature and diffraction gratin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01347","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":"2026-05-18T00:57:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"viVo9Kp2Y9MpeESl8f7W4JQVKiZWpePbPzkenpKSJ0iB17LNnHAEyqr4OFyxGUW1Aq8alCm8h57odyUngLFrCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:45:04.449118Z"},"content_sha256":"fd7685b3580a9a4ff887ed72cadaa020156f5b81f3afe9c3fe594d5f60583b9c","schema_version":"1.0","event_id":"sha256:fd7685b3580a9a4ff887ed72cadaa020156f5b81f3afe9c3fe594d5f60583b9c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/bundle.json","state_url":"https://pith.science/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/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":"2026-06-04T21:45:04Z","links":{"resolver":"https://pith.science/pith/QYS4OOMVDERUZXRGY7W5NCDFR7","bundle":"https://pith.science/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/bundle.json","state":"https://pith.science/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QYS4OOMVDERUZXRGY7W5NCDFR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:QYS4OOMVDERUZXRGY7W5NCDFR7","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":"e4a1199677213c99f90f8271715c238eeed200fe088548f1fe46c7fa4c2c062c","cross_cats_sorted":["physics.chem-ph","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-07-05T17:45:45Z","title_canon_sha256":"89bbaebb6ffd992879b1ce4f9e599bec9160156103ca9f9fb92e61f50c799b3f"},"schema_version":"1.0","source":{"id":"1607.01347","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01347","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01347v1","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01347","created_at":"2026-05-18T00:57:39Z"},{"alias_kind":"pith_short_12","alias_value":"QYS4OOMVDERU","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"QYS4OOMVDERUZXRG","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"QYS4OOMV","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:fd7685b3580a9a4ff887ed72cadaa020156f5b81f3afe9c3fe594d5f60583b9c","target":"graph","created_at":"2026-05-18T00:57:39Z","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 report on the design and characterization of a low-temperature external cavity diode laser (ECDL) system for broad wavelength tuning. The performance achieved with multiple diode models addresses the scarcity of commercial red laser diodes below 633 nm, which is a wavelength range relevant to spectroscopy of many molecules and ions. Using a combination of multiple-stage thermoelectric cooling and water cooling, the operating temperature of a laser diode is lowered to -64{\\deg}C, more than 85{\\deg}C below the ambient temperature. The laser system integrates temperature and diffraction gratin","authors_text":"Jason S. Rosenberg, Kang-Kuen Ni, Nicholas R. Hutzler, William G. Tobias","cross_cats":["physics.chem-ph","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-07-05T17:45:45Z","title":"A low-temperature external cavity diode laser for broad wavelength tuning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01347","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":"sha256:2771d2d301fa25c953ca038775aecfe42d936dabcf0af3e3057ce471c7274ee0","target":"record","created_at":"2026-05-18T00:57:39Z","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":"e4a1199677213c99f90f8271715c238eeed200fe088548f1fe46c7fa4c2c062c","cross_cats_sorted":["physics.chem-ph","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-07-05T17:45:45Z","title_canon_sha256":"89bbaebb6ffd992879b1ce4f9e599bec9160156103ca9f9fb92e61f50c799b3f"},"schema_version":"1.0","source":{"id":"1607.01347","kind":"arxiv","version":1}},"canonical_sha256":"8625c7399519234cde26c7edd688658fc41886cdace1ca23dc53537063ec112f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8625c7399519234cde26c7edd688658fc41886cdace1ca23dc53537063ec112f","first_computed_at":"2026-05-18T00:57:39.390789Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:39.390789Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U4pzaSkuAXQks8TJayHz5itBtfL3MdEm/vyFQnl2gFiYUPYbGR79FjwQ3fG3NCTYCWXo+k8ky3U8rvGjBmAqBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:39.391361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.01347","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2771d2d301fa25c953ca038775aecfe42d936dabcf0af3e3057ce471c7274ee0","sha256:fd7685b3580a9a4ff887ed72cadaa020156f5b81f3afe9c3fe594d5f60583b9c"],"state_sha256":"f774c5f1ba397bd72f2d98d05b3cefae713c84a6cc41c92384c5e3ff8ee5329e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7/xlUdL2ITqZKa7AlSF3y4oIzF0QIT1YH9q4hH9SlMKBFRVTCyAk2GNJ18stlR2wErasrT4LdkppfL02NhZNAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T21:45:04.451163Z","bundle_sha256":"a552dedf912be3281613e9404b82d6c51617b69e931448ae3d7e304b6a0d5dd0"}}