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Three-channel three-dimensional self-mixing thin-slice solid-state laser-Doppler measurements

机译:三通道三维自混合薄层固态激光多普勒测量

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摘要

We report successful real-time three-channel self-mixing laser-Doppler measurements with extreme optical sensitivity using a laser-diode-pumped thin-slice Nd:GdVO_(4) laser in the carrier-frequency-division-multiplexing scheme with three pairs of acoustic optical modulators (i.e., frequency shifters) and a three-channel FM-wave demodulation circuit. We demonstrate (1) simultaneous independent measurement of three different nanometer-vibrating targets, (2) simultaneous measurements of small particles in Brownian motion from three directions, and (3) identification of the velocity vector of small particles moving in water flowing in a small-diameter glass pipe.
机译:我们报告了使用激光二极管泵浦的薄Nd:GdVO_(4)激光器在三对载波频分复用方案中成功进行的具有极高光学灵敏度的实时三通道自混合激光多普勒测量声学光学调制器(即移频器)和三通道FM波解调电路。我们证明(1)同时独立测量三个不同的纳米振动目标,(2)同时测量来自三个方向的布朗运动中的小颗粒,以及(3)识别在小水中流动的小颗粒的速度矢量直径玻璃管。

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