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- Title
Temperature-dependent optical rotatory power in the presence of birefringence of KTA and KTP crystals by the high-accuracy universal polarimeter method at 632.8 nm wavelength.
- Authors
Hernández-Rodríguez, C.; Fragoso-López, A. B.; Herreros-Cedrés, J.; Guerrero-Lemus, R.
- Abstract
Temperature-dependent simultaneous measurement of birefringence and optical rotatory power (ORP) for orthorhombic crystals of potassium titanyl phosphate (KTP) and potassium titanyl arsenate (KTA) has been achieved by using the high-accuracy universal polarimeter method at 632.8 nm wavelength. The birefringence and ORP changes along the (110) planes for KTA and KTP crystals were found to have a nearly parabolic form for the temperature range 297-493 K. The thermal variation coefficients were found to be 0.9 (5) × 10-5 K-1 and 5.6 (3) × 10-8 K-2 for KTA and 0.9 (5) × 10-5 K-1 and 5.7 (3) × 10-8 K-2 for KTP. The ORPs at 297 K were found to be 20.0 (20) and 20.5 (15)° mm-1 for KTA and KTP, respectively. The thermal variation coefficients of the ORP were found to be 1.8 (2) × 10-3 ° mm-1 K-1 and 1.1 (1) × 10-5 ° mm-1 K-2 for KTA and 1.9 (2) × 10-3 ° mm-1 K-1 and 1.2 (1) × 10-5 ° mm-1 K-2 for KTP.
- Subjects
OPTICAL rotatory power; POTASSIUM titanyl phosphate; BIREFRINGENCE; CRYSTALS; ORTHORHOMBIC crystal system
- Publication
Journal of Applied Crystallography, 2014, Vol 47, Issue 2, p566
- ISSN
0021-8898
- Publication type
Article
- DOI
10.1107/S1600576714000454