Optimizing the signal-to-noise ratio of a beam-deflection measurement with interferometric weak values
Optimizing the signal-to-noise ratio of a beam-deflection measurement with interferometric weak values
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DOI：
10.1103/physreva.80.041803
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发表时间：
2009-10
影响因子：
2.9
通讯作者：
David J. Starling;P. B. Dixon;Andrew N. Jordan;John C. Howell
中科院分区：
文献类型：
--
作者：
David J. Starling;P. B. Dixon;Andrew N. Jordan;John C. Howell
通过对光束偏转测量的信噪比的详细研究，量化了使用弱值获得的放大。我们表明，对于一个给定的偏转，输入功率和光束半径，干涉弱值的使用允许一个使用相干光束获得最佳的信噪比。该方法具有降低技术噪声的优点，并且允许使用具有低饱和强度的检测器。我们报告的实验，提高了信号-噪声比的光束偏转测量的一个因素为54时相比，使用相同的光束尺寸和量子限制检测器的测量。
The amplification obtained using weak values is quantified through a detailed investigation of the signal-to-noise ratio for an optical beam-deflection measurement. We show that for a given deflection, input power and beam radius, the use of interferometric weak values allows one to obtain the optimum signal-to-noise ratio using a coherent beam. This method has the advantage of reduced technical noise and allows for the use of detectors with a low saturation intensity. We report on an experiment which improves the signal-to-noise ratio for a beam-deflection measurement by a factor of 54 when compared to a measurement using the same beam size and a quantum-limited detector.