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Elasto-optic coefficients of KGd(WO4)2 crystals

Martynyuk-Lototska I., Dudok T., Krupych O., Mys O. and Vlokh R.

Vlokh Institute of Physical Optics, 23 Dragomanov Street, 79005 Lviv, Ukraine

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Abstract. The modules of ten components of the elasto-optic tensor for KGd(WO4)2 crystals have been determined using a Dixon–Cohen method. We have found that some of the elasto-optic components of these crystals reach notably high values. Being combined with the fact of high acoustic-wave velocity, this should imply short response times of the acousto-optic devices based on KGd(WO4)2, provided that the acousto-optic figure of merit remains as high as that calculated in the present work, (32.6±4.5)×10–15 s3/kg. 

Keywords: KGd(WO4)2 crystals, elasto-optic coefficients, acousto-optics

UDC: 535.551+535.421
Ukr. J. Phys. Opt. 20 98-105
doi: 10.3116/16091833/20/3/98/2019
Received: 06.06.2019

Анотація. Методом Діксона-Коена в роботі визначено модулі десяти компонент пружно-оптичного тензора кристалів KGd(WO4)2. Виявлено, що деякі з компонент досягають високого значення, що разом з високими швидкостями поширення акустичних хвиль може привести до значної швидкодії акусто-оптичних пристроїв на основі кристалів KGd(WO4)2 при порівняно великих значеннях коефіцієнта акусто-оптичної якості ((32.6±4.5)×10–15 с3/кг). 
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