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Definition of Thermo-Optical Characteristics of Uniaxial Crystals.
- Source :
-
IEEE Journal of Quantum Electronics . Oct2017, Vol. 53 Issue 5, p1-8. 8p. - Publication Year :
- 2017
-
Abstract
- Thermally induced distortions of laser radiation caused by the photoelastic effect during high-power beam propagation through optical elements cut along the optical axis of uniaxial crystals have been investigated. Thermo-optical characteristics for uniaxial crystals of all three syngony types have been introduced: the optical anisotropy parameter $\xi $ defining the distribution of the axes of thermally induced birefringence over the cross section of the optical element, and the thermo-optical constants $Q$ and $P$ specifying the value of thermally induced depolarization and thermal lens strength, respectively. The introduced thermo-optical characteristics may be used as applicability criteria of various uniaxial crystals for work with high-power laser radiation. The optical anisotropy parameter $\xi $ of trigonal and hexagonal crystals has been found to be equal to unity by virtue of the isotropy of their piezo-optical properties in a plane perpendicular to the optical axis. We have analyzed by way of example thermally induced polarization distortions in a tetragonal DKDP crystal and in a trigonal CeF3 crystal. The distributions and dependences observed in experiment fully agree with the theoretical considerations. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *LASER beams
*PHOTOELASTICITY
*OPTICAL materials
*THERMAL lensing
*ANISOTROPY
Subjects
Details
- Language :
- English
- ISSN :
- 00189197
- Volume :
- 53
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- IEEE Journal of Quantum Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 125754994
- Full Text :
- https://doi.org/10.1109/JQE.2017.2727481