利用平衡零拍探测方法对TEM00模相干光激光束的微小平移进行一维测量的实验研究,实验装置最小可测平移量为0.3nm.实验验证了平移与倾斜这两个物理量之间的共轭关系.最后用模式重叠的概念分析了本底光偏离标准的TEM10模对测量结果的影响.实验结果与理论基本符合.
We report one-dimensional small displacement measurement of TEM00 mode with balanced homodyne detection.The smallest measurable displacement in our experimental setup is 0.3 nm.The conjugate properties of displacement and tilt are tested.Finally we analyze the effect of the deviation of local oscillator beam from TEM10 mode on the displacement measurement result.Experimental results are consistent well with the theoretical analyses.