Abstract

The article considers the possibility of constructing laser Doppler velocity vector meters based on a bichromatic source of spatially combined Gaussian or Bessel beams, the two-wave single-channel Bragg acousto-optic modulator with a ratio of ultrasonic wave frequencies equal to the ratio of the wave numbers of diffracted laser beams. The spatial, chromatic, and frequency structure of the 3D coordinate-measuring basis formed from the Gaussian or Bessel beams by the same sequence of optical elements and the photoelectric conversion adequate to the structure of light scattered by the investigated medium provide the minimum hardware Doppler spectrum width and increased noise immunity.

中文翻译：

---

双色激光多普勒速度矢量仪

摘要

本文考虑了基于空间组合的高斯或贝塞尔光束的双色源（双波单通道布拉格声光调制器，其超声波频率之比等于该频率之比）构造激光多普勒速度矢量计的可能性。衍射激光束的波数。由高斯光束或贝塞尔光束通过相同的光学元件序列形成的3D坐标测量基础的空间，色度和频率结构，以及足以适应被研究介质散射的光结构的光电转换，可提供最低的硬件多普勒光谱宽度和增强的抗噪能力。