{
  "alternatives": [
    {
      "category": "optical",
      "conditions": {
        "temperature_C": 25,
        "wavelength_nm": 1064
      },
      "id": "dno-dt/cln/cti1999-1064nm",
      "kind": "scalar",
      "name": "Thermo-optic coefficient, ordinary",
      "property": "dno-dt",
      "provenance": {
        "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C",
        "source_id": "cti1999",
        "status": "C",
        "transcribed": "2026-10-25"
      },
      "public": true,
      "symbol": "dn_o/dT",
      "unit": {
        "display": "1/K",
        "qudt": "http://qudt.org/vocab/unit/PER-K",
        "ucum": "/K"
      },
      "value": 5.4e-06,
      "variant": "cln"
    },
    {
      "category": "optical",
      "conditions": {
        "temperature_C": 25,
        "wavelength_nm": 1550
      },
      "id": "dno-dt/cln/cti1999-1550nm",
      "kind": "scalar",
      "name": "Thermo-optic coefficient, ordinary",
      "property": "dno-dt",
      "provenance": {
        "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C",
        "source_id": "cti1999",
        "status": "C",
        "transcribed": "2026-10-25"
      },
      "public": true,
      "symbol": "dn_o/dT",
      "unit": {
        "display": "1/K",
        "qudt": "http://qudt.org/vocab/unit/PER-K",
        "ucum": "/K"
      },
      "value": 4.1e-06,
      "variant": "cln"
    },
    {
      "category": "optical",
      "conditions": {
        "temperature_C": 25,
        "wavelength_nm": 633
      },
      "id": "dno-dt/cln/cti1999-633nm",
      "kind": "scalar",
      "name": "Thermo-optic coefficient, ordinary",
      "property": "dno-dt",
      "provenance": {
        "derivation": "derivative of the cti1999 vendor Sellmeier (status V) at 25 C",
        "source_id": "cti1999",
        "status": "C",
        "transcribed": "2026-10-25"
      },
      "public": true,
      "symbol": "dn_o/dT",
      "unit": {
        "display": "1/K",
        "qudt": "http://qudt.org/vocab/unit/PER-K",
        "ucum": "/K"
      },
      "value": 9.4e-06,
      "variant": "cln"
    },
    {
      "category": "optical",
      "conditions": {
        "temperature_text": "300 K",
        "wavelength_nm": 632
      },
      "id": "dno-dt/cln/moretti2005-632nm-300k",
      "kind": "scalar",
      "name": "Thermo-optic coefficient, ordinary",
      "notes": "2.5x below the value derived from the cti1999 Sellmeier.",
      "property": "dno-dt",
      "provenance": {
        "derivation": "dn_o/dT = (-1.7 + 6.9e-3 T) x 1.0e-5 per K evaluated at T = 300 K (T in K inferred); formula status S",
        "locator": "schwesyg2011 Eqs. (2.26)-(2.27)",
        "source_id": "moretti2005",
        "status": "C",
        "transcribed": "2026-10-25",
        "via": "schwesyg2011"
      },
      "public": true,
      "symbol": "dn_o/dT",
      "unit": {
        "display": "1/K",
        "qudt": "http://qudt.org/vocab/unit/PER-K",
        "ucum": "/K"
      },
      "value": 3.7e-06,
      "variant": "cln"
    }
  ],
  "meta": {
    "api_version": "v1",
    "attribution": "lithium-niobate.com data compiled by Wentao Jiang; cite the original sources listed per value.",
    "data_version": "0.1.0",
    "documentation": "https://lithium-niobate.com/api/openapi.json",
    "license": {
      "id": "CC-BY-4.0",
      "name": "Creative Commons Attribution 4.0 International",
      "url": "https://creativecommons.org/licenses/by/4.0/"
    },
    "property": "dno-dt",
    "variant": "cln"
  },
  "recommended": [],
  "recommended_note": "No single recommended record: sources disagree or none is primary; see alternatives and spread.",
  "spread": {
    "max": 9.4e-06,
    "min": 3.7e-06,
    "n_records": 4,
    "note": "Range over all public records regardless of conditions; compare conditions before use.",
    "unit": "/K"
  }
}