Related papers: Complete characterization of beam deflection based on double weak value amplification system

Complete characterization of beam deflection based on double weak value amplification system

URL: http://arxiv.org/abs/2510.27398v1
Date: Fri, 31 Oct 2025 11:35:17 GMT
Title: Complete characterization of beam deflection based on double weak value amplification system
Authors: Yu Wang, Rongguo Yang, Jing Zhang, Xiaomin Liu, Chenzhen Luo, Kui Liu, Jiangrui Gao,
Abstract summary: We experimentally realize the simultaneous measurement of the yaw and pitch angles using a Hermite-Gaussian-postselected double weak value system.<n>The signals of the yaw and pitch angles that are involved in TEM$_10$ and TEM$_01$ modes output from two dark ports of the system can be measured independently.
Score: 10.834001337347729
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The precise measurement of spatial attitude parameters is critical for applications in inertial navigation, industrial monitoring, instrument calibration, quantum metrology, etc. In this work, we theoretically investigate and experimentally realize the simultaneous measurement of the yaw and pitch angles using a Hermite-Gaussian-postselected double weak value system integrated with two sets of high-order-mode balanced homodyne detections, thereby achieving a complete characterization of the beam deflection. Signals of the yaw and pitch angles that are involved in TEM$_{10}$ and TEM$_{01}$ modes output from two dark ports of the system can be measured independently. As a result, the obtained minimum measurable yaw and pitch angles of beam deflection are 83 prad and 89 prad, respectively. Meanwhile, the corresponding displacements are 0.79 pm and 0.85 pm, respectively. This work expands the beam deflection measurement to two dimensions, which provides a new insight for future high-precision multi-parameter spatial precise detection.

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