Optimizing the signal-to-noise ratio of a beam-deflection measurement with interferometric weak values
- 8 October 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 80 (4), 041803
- https://doi.org/10.1103/physreva.80.041803
Abstract
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.Keywords
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