The temperature variation of the thermo-optic coefficient of CaF2
We report measurements of dn/dT, the thermo-optic coefficient, i.e., the temperature derivative of the refractive index, for single-crystal CaF2 at temperatures ranging from 95 to 175 °K. Over this temperature range dn/dT shows a strong variation, with a substantial reduction in magnitude from that...
Gespeichert in:
Veröffentlicht in: | Journal of applied physics 1977-05, Vol.48 (5), p.1953-1955 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | We report measurements of dn/dT, the thermo-optic coefficient, i.e., the temperature derivative of the refractive index, for single-crystal CaF2 at temperatures ranging from 95 to 175 °K. Over this temperature range dn/dT shows a strong variation, with a substantial reduction in magnitude from that at room temperature. These data along with those obtained previously at room temperature indicate that dn/dT for this crystal is proportional to the thermal expansion coefficient over a wide temperature range and that the proportionality constant can be accurately obtained from the pressure dependence of the refractive index. |
---|---|
ISSN: | 0021-8979 1089-7550 |
DOI: | 10.1063/1.323900 |