{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:3EZ5SNQ7Y55TEEPLKOHFQVFB65","short_pith_number":"pith:3EZ5SNQ7","schema_version":"1.0","canonical_sha256":"d933d9361fc77b3211eb538e5854a1f76156325bcb1e817f586a9759d0f91ec0","source":{"kind":"arxiv","id":"1801.07850","version":1},"attestation_state":"computed","paper":{"title":"Mid-infrared frequency comb generation via cascaded quadratic nonlinearities in quasi-phase-matched waveguides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Abijith S. Kowligy, Alex Lind, Daniel D. Hickstein, David R. Carlson, Flavio C. Cruz, Gabriel Ycas, Henry Timmers, Nima Nader, Scott A. Diddams, Scott B. Papp","submitted_at":"2018-01-24T03:35:26Z","abstract_excerpt":"We experimentally demonstrate a simple configuration for mid-infrared (MIR) frequency comb generation in quasi-phase-matched lithium niobate waveguides using the cascaded-$\\chi^{(2)}$ nonlinearity. With nanojoule-scale pulses from an Er:fiber laser, we observe octave-spanning supercontinuum in the near-infrared with dispersive-wave generation in the 2.5--3 $\\text{\\mu}$m region and intra-pulse difference-frequency generation in the 4--5 $\\text{\\mu}$m region. By engineering the quasi-phase-matched grating profiles, tunable, narrow-band MIR and broadband MIR spectra are both observed in this geom"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1801.07850","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-01-24T03:35:26Z","cross_cats_sorted":[],"title_canon_sha256":"3c920b2aa086ee2d73c16b214fdbbd082782eaf0407e7fdf4cd72f6c0312453f","abstract_canon_sha256":"c0c9f496997b6a7deb43228297cbba756a1fb9b2db740876e8894c920a85591a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:26.883686Z","signature_b64":"FNbVzfyNJ4VrF22VCltonuDc0UUwADwuTg8v14pj2/4Xwd7yUx+HPdcKgCG0l/IeyOQSlsdtc089s0rs95IRCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d933d9361fc77b3211eb538e5854a1f76156325bcb1e817f586a9759d0f91ec0","last_reissued_at":"2026-05-18T00:16:26.882982Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:26.882982Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Mid-infrared frequency comb generation via cascaded quadratic nonlinearities in quasi-phase-matched waveguides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Abijith S. Kowligy, Alex Lind, Daniel D. Hickstein, David R. Carlson, Flavio C. Cruz, Gabriel Ycas, Henry Timmers, Nima Nader, Scott A. Diddams, Scott B. Papp","submitted_at":"2018-01-24T03:35:26Z","abstract_excerpt":"We experimentally demonstrate a simple configuration for mid-infrared (MIR) frequency comb generation in quasi-phase-matched lithium niobate waveguides using the cascaded-$\\chi^{(2)}$ nonlinearity. With nanojoule-scale pulses from an Er:fiber laser, we observe octave-spanning supercontinuum in the near-infrared with dispersive-wave generation in the 2.5--3 $\\text{\\mu}$m region and intra-pulse difference-frequency generation in the 4--5 $\\text{\\mu}$m region. By engineering the quasi-phase-matched grating profiles, tunable, narrow-band MIR and broadband MIR spectra are both observed in this geom"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07850","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1801.07850","created_at":"2026-05-18T00:16:26.883107+00:00"},{"alias_kind":"arxiv_version","alias_value":"1801.07850v1","created_at":"2026-05-18T00:16:26.883107+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07850","created_at":"2026-05-18T00:16:26.883107+00:00"},{"alias_kind":"pith_short_12","alias_value":"3EZ5SNQ7Y55T","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"3EZ5SNQ7Y55TEEPL","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"3EZ5SNQ7","created_at":"2026-05-18T12:32:02.567920+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65","json":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65.json","graph_json":"https://pith.science/api/pith-number/3EZ5SNQ7Y55TEEPLKOHFQVFB65/graph.json","events_json":"https://pith.science/api/pith-number/3EZ5SNQ7Y55TEEPLKOHFQVFB65/events.json","paper":"https://pith.science/paper/3EZ5SNQ7"},"agent_actions":{"view_html":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65","download_json":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65.json","view_paper":"https://pith.science/paper/3EZ5SNQ7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1801.07850&json=true","fetch_graph":"https://pith.science/api/pith-number/3EZ5SNQ7Y55TEEPLKOHFQVFB65/graph.json","fetch_events":"https://pith.science/api/pith-number/3EZ5SNQ7Y55TEEPLKOHFQVFB65/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65/action/storage_attestation","attest_author":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65/action/author_attestation","sign_citation":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65/action/citation_signature","submit_replication":"https://pith.science/pith/3EZ5SNQ7Y55TEEPLKOHFQVFB65/action/replication_record"}},"created_at":"2026-05-18T00:16:26.883107+00:00","updated_at":"2026-05-18T00:16:26.883107+00:00"}