{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7SXRMOJTH4SDF4XWPDF4FDWMVQ","short_pith_number":"pith:7SXRMOJT","canonical_record":{"source":{"id":"1812.03879","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-12-10T15:35:57Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"96749c6459755b2f0414e14433cee64e52d7644fb5a48632e29596c35049f818","abstract_canon_sha256":"781c5351ea025f99f11d0b4fe61386eee7777175c6337708527408bfa97e9012"},"schema_version":"1.0"},"canonical_sha256":"fcaf1639333f2432f2f678cbc28eccac006520ba58356910ca59dfeb66ff26df","source":{"kind":"arxiv","id":"1812.03879","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03879","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03879v1","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03879","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"7SXRMOJTH4SD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7SXRMOJTH4SDF4XW","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7SXRMOJT","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7SXRMOJTH4SDF4XWPDF4FDWMVQ","target":"record","payload":{"canonical_record":{"source":{"id":"1812.03879","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-12-10T15:35:57Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"96749c6459755b2f0414e14433cee64e52d7644fb5a48632e29596c35049f818","abstract_canon_sha256":"781c5351ea025f99f11d0b4fe61386eee7777175c6337708527408bfa97e9012"},"schema_version":"1.0"},"canonical_sha256":"fcaf1639333f2432f2f678cbc28eccac006520ba58356910ca59dfeb66ff26df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:43.683662Z","signature_b64":"tqVAv2EHO7kIZDchxGQ2B4xKYGyK88XvZtCLZflh5edOMghvtQ7WvOWwRskQAC9CEnE+ZLaLYEJm/Nr1Jhj1Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fcaf1639333f2432f2f678cbc28eccac006520ba58356910ca59dfeb66ff26df","last_reissued_at":"2026-05-17T23:58:43.683071Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:43.683071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.03879","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":"2026-05-17T23:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ffI8DgY10ovG24S+8iju0LNIE7leV2sis/IHXUv1OHvL3OcbAojX1wt8hhhhLbUUphDR4TpLag5TEtSIpYtPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:31:36.581035Z"},"content_sha256":"87336424ee3fd408814f48a666fa846a4f5e535e14297c8360bb1259e1b2d4f9","schema_version":"1.0","event_id":"sha256:87336424ee3fd408814f48a666fa846a4f5e535e14297c8360bb1259e1b2d4f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7SXRMOJTH4SDF4XWPDF4FDWMVQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A monolithic frequency comb platform based on interband cascade lasers and detectors","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Aaron Maxwell Andrews, Anne Schade, Benedikt Schwarz, Gottfried Strasser, Hermann Detz, Johannes Hillbrand, Maximilian Beiser, Robert Weih, Sven H\\\"ofling","submitted_at":"2018-12-10T15:35:57Z","abstract_excerpt":"Optical frequency combs enable all-solid-state spectrometers that will trigger a breakthrough in miniaturization and on-chip integration of mid-infrared sensing technology. Interband cascade lasers (ICLs) are an ideal candidate for practical implementations due to their low power consumption and zero-bias detection functionality. Here, we demonstrate the generation of self-starting ICL frequency combs. We show that the gain is fast enough to respond to beating of the intracavity field, which hinders the formation of short pulses. Instead, the ICL operates in a comb state, where the phases of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03879","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":"2026-05-17T23:58:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yrm20s0TGO02POLTsB5hzp7TbdHiwO0IICwjiGaccx2FjJFDMwUJ9JHlfJQHQ8Y8Ur6WnhSl3yrkx1pyHK3XCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:31:36.581748Z"},"content_sha256":"3d4eda736f03351631458a869e8bf409cd435e10be8695c824a45b0bdeff043e","schema_version":"1.0","event_id":"sha256:3d4eda736f03351631458a869e8bf409cd435e10be8695c824a45b0bdeff043e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/bundle.json","state_url":"https://pith.science/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/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":"2026-05-30T22:31:36Z","links":{"resolver":"https://pith.science/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ","bundle":"https://pith.science/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/bundle.json","state":"https://pith.science/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7SXRMOJTH4SDF4XWPDF4FDWMVQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7SXRMOJTH4SDF4XWPDF4FDWMVQ","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":"781c5351ea025f99f11d0b4fe61386eee7777175c6337708527408bfa97e9012","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-12-10T15:35:57Z","title_canon_sha256":"96749c6459755b2f0414e14433cee64e52d7644fb5a48632e29596c35049f818"},"schema_version":"1.0","source":{"id":"1812.03879","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03879","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03879v1","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03879","created_at":"2026-05-17T23:58:43Z"},{"alias_kind":"pith_short_12","alias_value":"7SXRMOJTH4SD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7SXRMOJTH4SDF4XW","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7SXRMOJT","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:3d4eda736f03351631458a869e8bf409cd435e10be8695c824a45b0bdeff043e","target":"graph","created_at":"2026-05-17T23:58:43Z","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":"Optical frequency combs enable all-solid-state spectrometers that will trigger a breakthrough in miniaturization and on-chip integration of mid-infrared sensing technology. Interband cascade lasers (ICLs) are an ideal candidate for practical implementations due to their low power consumption and zero-bias detection functionality. Here, we demonstrate the generation of self-starting ICL frequency combs. We show that the gain is fast enough to respond to beating of the intracavity field, which hinders the formation of short pulses. Instead, the ICL operates in a comb state, where the phases of t","authors_text":"Aaron Maxwell Andrews, Anne Schade, Benedikt Schwarz, Gottfried Strasser, Hermann Detz, Johannes Hillbrand, Maximilian Beiser, Robert Weih, Sven H\\\"ofling","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-12-10T15:35:57Z","title":"A monolithic frequency comb platform based on interband cascade lasers and detectors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03879","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":"sha256:87336424ee3fd408814f48a666fa846a4f5e535e14297c8360bb1259e1b2d4f9","target":"record","created_at":"2026-05-17T23:58:43Z","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":"781c5351ea025f99f11d0b4fe61386eee7777175c6337708527408bfa97e9012","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2018-12-10T15:35:57Z","title_canon_sha256":"96749c6459755b2f0414e14433cee64e52d7644fb5a48632e29596c35049f818"},"schema_version":"1.0","source":{"id":"1812.03879","kind":"arxiv","version":1}},"canonical_sha256":"fcaf1639333f2432f2f678cbc28eccac006520ba58356910ca59dfeb66ff26df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fcaf1639333f2432f2f678cbc28eccac006520ba58356910ca59dfeb66ff26df","first_computed_at":"2026-05-17T23:58:43.683071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:43.683071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tqVAv2EHO7kIZDchxGQ2B4xKYGyK88XvZtCLZflh5edOMghvtQ7WvOWwRskQAC9CEnE+ZLaLYEJm/Nr1Jhj1Ag==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:43.683662Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.03879","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87336424ee3fd408814f48a666fa846a4f5e535e14297c8360bb1259e1b2d4f9","sha256:3d4eda736f03351631458a869e8bf409cd435e10be8695c824a45b0bdeff043e"],"state_sha256":"f7ebd747a976b2245c38617ba6c671785e0ff23df6117efcd9bd41a30b4e196f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HHZm7v0MuVPE5V+GAMZtcXo82xHvGsQ0zX833fkutGb6zjoAfSgy5JW9LNtIigg8GhDNr7bh3H/ABrmZXSyECA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:31:36.585583Z","bundle_sha256":"bfee3de2ea1a99eb70857e6090bb28036c593f92d606764e0d3a3256eb4437e8"}}