Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Ultrasonics. 2012 Jul;52(5):643-9. doi: 10.1016/j.ultras.2012.01.004. Epub 2012 Jan 24.
Thermal effects greatly influence the optical properties of the acousto-optic deflectors (AODs). Thermal analysis plays an important role in modern AOD design. However, the lack of an effective method of analysis limits the prediction in the thermal performance. In this paper, we propose a finite element analysis model to analyze the thermal effects of a TeO(2)-based AOD. Both transducer heating and acoustic absorption are considered as thermal sources. The anisotropy of sound propagation is taken into account for determining the acoustic absorption. Based on this model, a transient thermal analysis is employed using ANSYS software. The spatial temperature distributions in the crystal and the temperature changes over time are acquired. The simulation results are validated by experimental results. The effect of heat source and heat convection on temperature distribution is discussed. This numerical model and analytical method of thermal analysis would be helpful in the thermal design and practical applications of AODs.
热效应对声光调制器（AOD）的光学性质有很大影响。热分析在现代 AOD 设计中起着重要作用。然而，缺乏有效的分析方法限制了对热性能的预测。在本文中，我们提出了一种有限元分析模型来分析基于 TeO(2)的 AOD 的热效应。将换能器加热和声波吸收都视为热源。为了确定声波吸收，考虑了声波传播的各向异性。基于该模型，使用 ANSYS 软件进行了瞬态热分析。获得了晶体中的空间温度分布和随时间的温度变化。通过实验结果验证了模拟结果。讨论了热源和热对流对温度分布的影响。这种数值模型和热分析的分析方法有助于 AOD 的热设计和实际应用。
