High-precision laser centroid extraction algorithm for slight positional variations using four-quadrant detectors

Ning Pan; Kaihang Zhao; Yuejia Li; Huiwen Liu; Jian Bai

doi:10.1117/12.3037139

27 November 2024 High-precision laser centroid extraction algorithm for slight positional variations using four-quadrant detectors

Ning Pan, Kaihang Zhao, Yuejia Li, Huiwen Liu, Jian Bai

Author Affiliations +

Proceedings Volume 13237, Optical Design and Testing XIV; 132371M (2024) https://doi.org/10.1117/12.3037139
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

This article presents a high-precision algorithm for extracting laser centroids using a four-quadrant detector (4QD), specifically designed for situations where laser position shifts happen on the nanoscale. The algorithm uses an iterative method to create a functional relationship between position changes and the differential output signals from the 4QD. We have validated the algorithm through simulations and experimental tests.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Ning Pan, Kaihang Zhao, Yuejia Li, Huiwen Liu, and Jian Bai "High-precision laser centroid extraction algorithm for slight positional variations using four-quadrant detectors", Proc. SPIE 13237, Optical Design and Testing XIV, 132371M (27 November 2024); https://doi.org/10.1117/12.3037139

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