Tyszka Krzysztof, Dobosz Marek, Bilaszewski Tomasz
Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Św. A. Boboli 8, 02-525 Warsaw, Poland.
Rev Sci Instrum. 2018 Feb;89(2):025113. doi: 10.1063/1.5011979.
Aiming to increase laser beam pointing stability required in interferometric measurements, we designed a laser beam deflector intended for active laser beam stabilization systems. The design is based on two wedge-prisms: the deflecting wedge driven by a tilting piezo-platform and the fixed wedge to compensate initial beam deflection. Our design allows linear beam steering, independently in the horizontal or vertical direction, with resolution of less than 1 μrad in a range of more than 100 μrad, and no initial deflection of the beam. Moreover, the ratio of the output beam deflection angle and the wedge tilt angle is less than 0.1; therefore, the noise influence is significantly reduced in comparison to standard mirror-based deflectors. The theoretical analyses support the designing process and can serve as a guide to wedge-prism selection. The experimental results are in agreement with theory and confirm the advantages of the presented double wedge system.
为了提高干涉测量中所需的激光束指向稳定性，我们设计了一种用于有源激光束稳定系统的激光束偏转器。该设计基于两个楔形棱镜：由倾斜压电平台驱动的偏转楔形棱镜和用于补偿初始光束偏转的固定楔形棱镜。我们的设计允许在水平或垂直方向上独立进行线性光束转向，在超过100 μrad的范围内分辨率小于1 μrad，并且光束无初始偏转。此外，输出光束偏转角与楔形棱镜倾斜角的比值小于0.1；因此，与基于标准反射镜的偏转器相比，噪声影响显著降低。理论分析支持设计过程，并可作为楔形棱镜选择的指南。实验结果与理论一致，证实了所提出的双楔形系统的优点。
