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Torque-operated gradient-index axicon

Vasylkiv Yu., Smyk M., Skab I. and Vlokh R.

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Abstract. We describe a gradient-index axicon based on twisting of crystals. We demonstrate that the focal length of the axicon can be efficiently operated by the torsion moment. The working analytical relations describing the focal length of the axicon and its dependence on different geometrical parameters as well as the torsion moment has been derived.

Keywords: axicon, piezooptic effect, torsion stress, lithium niobate crystals

PACS: 42.79.Bh, 78.20.Hp
UDC: 535.316+535.55
Ukr. J. Phys. Opt. 15 9-16
doi: 10.3116/16091833/15/1/9/2014
Received: 18.09.2013

Анотація. В роботі описано аксікон граданного типу на основі кручення кристалів. Показано, що фокусна відстань аксікона може керуватись торсійним моментом. Отримані співвідношення, які описують залежність фокусної відстані аксікона від його геометричних параметрів та торсійного моменту. 
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