Researching | Beam Pointing Deviation Correction System Based on Fast Steering Mirrors

Chinese Journal of Lasers, Volume. 50, Issue 14, 1405003(2023)

Beam Pointing Deviation Correction System Based on Fast Steering Mirrors

Xingfei Ren, Jinwei Fan^*, Ri Pan, and Kun Sun

Author Affiliations

Institute of CNC Precision Machining Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China

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Figures&Tables (8)

References (27)

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Figures & Tables(8)

Fig. 1. Schematic of beam pointing deviation correction system

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Fig. 2. Schematic of principle of detector

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Fig. 3. Experiment diagram

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Fig. 4. Prediction results for incident laser pointing deviations. (a) $δ_{y}$ ; (b) $δ_{z}$ ; (c) $ε_{y}$ ; (d) $ε_{z}$

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Fig. 5. Error distributions of control angles calculated using mapping model. (a) $α_{2}$ ; (b) $γ_{2}$ ; (c) $α_{3}$ ; (d) $γ_{3}$

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Fig. 6. Position offsets detected by CMOS. (a) $δ_{o x}$ ; (b) $δ_{o y}$

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Fig. 7. Beam focus shift distributions before and after correction. (a) $δ_{o x}$ ; (b) $δ_{o y}$

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Table 1. Original attitude of each component
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Table 1. Original attitude of each component
Optical element Laser Reflector FSM1 FSM2 BS1 BS2 PSD1 PSD2
$O_{i x}$ /mm $-$ 100 0 0 200 200 200 200 100
$O_{i y}$ /mm 50 50 0 0 50 100 150 100
$O_{i z}$ /mm 0 0 0 0 0 0 0 0
$n_{i x}$ 1 $- 1 / \sqrt[]{2}$ $- 1 / \sqrt[]{2}$ $- 1 / \sqrt[]{2}$ $1 / \sqrt[]{2}$ $- 1 / \sqrt[]{2}$ 1 0
$n_{i y}$ 0 $- 1 / \sqrt[]{2}$ $1 / \sqrt[]{2}$ $1 / \sqrt[]{2}$ $- 1 / \sqrt[]{2}$ $- 1 / \sqrt[]{2}$ 0 $-$ 1
$n_{i z}$ 0 0 0 0 0 0 0 0

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Xingfei Ren, Jinwei Fan, Ri Pan, Kun Sun. Beam Pointing Deviation Correction System Based on Fast Steering Mirrors[J]. Chinese Journal of Lasers, 2023, 50(14): 1405003

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Paper Information

Category: Beam transmission and control

Received: Nov. 28, 2022

Accepted: Feb. 27, 2023

Published Online: Jul. 10, 2023

The Author Email: Fan Jinwei (jwfan@bjut.edu.cn)

DOI:10.3788/CJL221459

Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology