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The anisotropy of acoustooptic figure of merit for the collinear diffraction in LiNbO3 crystals

Kryvyy T., Mys O., Krupych O. and Vlokh R.

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

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Abstract. We have shown that the maximal acoustooptic figure of merit for the collinear type of acoustooptic diffraction in LiNbO3 crystals is peculiar for the interaction with acoustic wave QT1 polarized parallel to the principal Z axis. All the interacting waves in this case propagate in the principal plane XY along the direction inclined by 50o or 130o deg with respect to the X axis. The acoustooptic figure of merit for this interaction type is equal to 10.07*10–15 s3/kg. 

Keywords:  collinear acoustooptic diffraction, lithium niobate crystals, acoustooptic figure of merit, anisotropy

PACS: 43.35.Sx, 42.70.Mp
UDC: 535.012.2+535.42+534.321.9
Ukr. J. Phys. Opt. 17 176-187
doi: 10.3116/16091833/17/4/176/2016
Received: 13.10.2016

Анотація. Показано, що максимальне значення коефіцієнта акустооптичної якості для колінеарної акустооптичної дифракції в кристалах ніобату літію притаманне взаємодії з акустичною хвилею QT1, поляризованою паралельно до головної осі Z. Тоді всі взаємодіючі хвилі поширюються в головній площині XY у напрямках, що відхиляються від осі X на кути 50o і 130o град. Відповідне значення коефіцієнта акустооптичної якості складає 10.07*10–15 с3/кг.

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