入射光方向对碲酸声光可调谐滤波器基本性能的影响。

Effect of direction of incident light on the basic performance of a TeO acousto-optic tunable filter.

作者信息

Wang Pengchong, Zhang Zhonghua

出版信息

Appl Opt. 2016 Aug 1;55(22):5860-7. doi: 10.1364/AO.55.005860.

DOI:10.1364/AO.55.005860

Abstract

The selection of the ultrasonic polar angle is vitally important to the performance of an acousto-optic tunable filter (AOTF). The effects of ultrasonic angle on various properties of AOTFs were studied. Then, according to the selected ultrasonic angle, the changes of internal and external separation angles were analyzed in detail when the light was incident upon the crystal surface in two different ways. Additionally, the drift of diffracted light caused by chromatic aberration was analyzed, and an appropriate compensation wedge angle was calculated by the improved derivation formula. The external separation angle increased obviously after placing a wedge angle on the output end. Finally, the effect of incident beam with a cone angle on spectral bandwidth and diffraction efficiency is discussed.

摘要

超声偏振角的选择对声光可调谐滤波器（AOTF）的性能至关重要。研究了超声角度对AOTF各种特性的影响。然后，根据选定的超声角度，详细分析了光以两种不同方式入射到晶体表面时内外分离角的变化。此外，分析了色差引起的衍射光漂移，并通过改进的推导公式计算出合适的补偿楔角。在输出端放置楔角后，外部分离角明显增大。最后，讨论了具有锥角的入射光束对光谱带宽和衍射效率的影响。