Simulation and experimental study of beam quality measurement for short distance transmission of high power laser

Yang LI; Lei LIU; Gang WANG; Wentao WANG; Xiaojun TANG

doi:10.3788/IRLA20240249

Journals >Infrared and Laser Engineering >Volume 53 >Issue 9 >Page 20240249 > Article

Infrared and Laser Engineering
Vol. 53, Issue 9, 20240249 (2024)

Simulation and experimental study of beam quality measurement for short distance transmission of high power laser

Yang LI¹, Lei LIU^1,2,*, Gang WANG¹, Wentao WANG¹, and Xiaojun TANG¹

Author Affiliations

¹China Electronics Technology Group Eleventh Research Institute, Beijing 100015, China

²School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China

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DOI: 10.3788/IRLA20240249 Cite this Article

Yang LI, Lei LIU, Gang WANG, Wentao WANG, Xiaojun TANG. Simulation and experimental study of beam quality measurement for short distance transmission of high power laser[J]. Infrared and Laser Engineering, 2024, 53(9): 20240249 Copy Citation Text

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Fig. 1. Schematic diagram of beam quality short-range measurement at the laser system export

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(a) Far-field light spots under weak turbulence; (b) Far-field light spots under moderate turbulence; (c) Far-field light spots under strong turbulence

Fig. 2. (a) Far-field light spots under weak turbulence; (b) Far-field light spots under moderate turbulence; (c) Far-field light spots under strong turbulence

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$(a) \begin{document}$ C_n^2 $\end{document} influence curve on \begin{document}$ \beta $\end{document} factors; (b) \begin{document}$ \beta $\end{document} factors under different \begin{document}$ C_n^2 $\end{document}$

Fig. 3. (a)

Unknown environment 'document'

influence curve on

Unknown environment 'document'

factors; (b)

Unknown environment 'document'

factors under different

Unknown environment 'document'

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$(a) Influence curves of transverse wind speed on \begin{document}$ \beta $\end{document} factor; (b) Influence curves of relative air humidity on \begin{document}$ \beta $\end{document} factor$

Fig. 4. (a) Influence curves of transverse wind speed on

Unknown environment 'document'

factor; (b) Influence curves of relative air humidity on

Unknown environment 'document'

factor

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$(a) Influence curves of beam diameter on \begin{document}$ \beta $\end{document} factor; (b) Influence curves of outgoing light power on \begin{document}$ \beta $\end{document} factor$

Fig. 5. (a) Influence curves of beam diameter on

Unknown environment 'document'

factor; (b) Influence curves of outgoing light power on

Unknown environment 'document'

factor

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$The impact curve of \begin{document}$ C_n^2 $\end{document} on \begin{document}$ \beta $\end{document} factor under different initial \begin{document}$ \beta $\end{document} factors$

Fig. 6. The impact curve of

Unknown environment 'document'

Unknown environment 'document'

factor under different initial

Unknown environment 'document'

factors

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$Influence curves of \begin{document}$ C_n^2 $\end{document} on \begin{document}$ \beta $\end{document} factors at different transmission distances$

Fig. 7. Influence curves of

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Unknown environment 'document'

factors at different transmission distances

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Fig. 8. 700 mm parallel light tube

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Fig. 9. (a) Light spot of weak turbulence far field in 700 mm parallel light tube; (b) Light spot of moderate turbulence far field in 700 mm parallel light tube

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$Indoor changes of \begin{document}$ C_n^2 $\end{document} in different time periods$

Fig. 10. Indoor changes of

Unknown environment 'document'

in different time periods

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$ C_n^2 $	Enormous influence
Transverse wind speed	Almost no effect
Relative air humidity	Almost no effect
Beam diameter	Certain implications
Outgoing laser power	Almost no effect
Initial $ \beta $ factor	Certain implications
Transmission distances	Certain implications