研究目的
To improve the position measurement accuracy for Laguerre-Gaussian beams on a quadrant detector by introducing a position error compensation factor and the concept of effective radius.
研究成果
The proposed method significantly improves the position measurement accuracy for Laguerre-Gaussian beams on a quadrant detector, with a maximum error reduction of 97.4% and root mean square errors under different radii all less than 0.004 mm. The method shows good stability for different beam radii and is applicable for other types of QDs with different radii and gaps.
研究不足
The study focuses on simulation results and does not address random errors caused by factors such as dark current of the QD and the asymmetry or distortion of the beam in practical applications.
1：Experimental Design and Method Selection:
The study introduces a position error compensation factor and the concept of effective radius to improve the accuracy of position measurement for Laguerre-Gaussian beams on a quadrant detector. The least square method is used for fitting.
2：Sample Selection and Data Sources:
Simulation data is used to validate the proposed method.
3：List of Experimental Equipment and Materials:
A quadrant detector with specific radius and gap size is considered.
4：Experimental Procedures and Operational Workflow:
The beam is moved across the detector, and the output current values are recorded to calculate the centroid position.
5：Data Analysis Methods:
The least square method is used to fit the data and calculate the effective beam radius.
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