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Determination of piezooptic coefficient p14  of LiNbO3 crystals under torsion loading
Vasylkiv Yu., Savaryn V., Smaga I., Skab I., Vokh R.

Institute of Physical Optics, 23 Dragomanov St., 79005, Lviv, Ukraine

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We show that non-principal piezooptic coefficients can be quite accurately determined after a distribution of shear strain components under torsion of LiNbO3 crystal rod has been studied. The piezooptic coefficient p14  of LiNbO3 crystals found in this way is   |p14|=(8.87 ±0.28)×10-13m2/N, while the corresponding error is very low and amounts to 3.1%.

Keywords: : piezooptic coefficients, lithium niobate crystals, methods of measurements, torsion strains

PACS: 78.20.Hp, 62.20.-x
UDC: 535.542
Ukr. J. Phys. Opt. 11 156-164   doi: 10.3116/16091833/11/3/156/2010
Received: 29.06.2010

Анотація. В роботі показано, що не основні пєзооптичні коефіцієнти можуть бути достатньо точно визначені при встановленні розподілу зсувних напружень зумовлених крученням стержня кристалу LiNbO3. Визначений, таким чином, пєзооптичний коефіцієнт p14кристалів LiNbO3  становить |p14|=(8.87 ±0.28)×10-13m2/N, тоді як відповідна похибка вимірювання дорівнює 3.1%.
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