29 November 2012 Numerical analysis of beam quality factor β on coherent combination of multiple laser beams
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Proceedings Volume 8551, High-Power Lasers and Applications VI; 85511C (2012); doi: 10.1117/12.999816
Event: Photonics Asia, 2012, Beijing, China
Abstract
numerical simulation model for coherent combination of multiple rectangular beams, square beams and circular beams has been developed. The beam quality factor β of wavelet and its combination was obtained by numerical calculation through fast Fourier transform (FFT) when each wavelet has Zernike aberrations with twenty-one polynomials. The influence of piston on coherent beam combination was analyzed too. It’s demonstrated that the influence of piston on CBC(coherent beam combination) was small if each wavelet has many other higher order aberrations. The relationship between the averaged beam quality factor β of all wavelets and beam quality factor β of CBC based on these wavelets was also obtained by numerical calculation. A fitting formula was used to fit the discrete data. By this way, an expression of the relationship was acquired. Fitting coefficients between numerical calculation and theoretical result were compared and the affecting factor of the difference was analyzed. We concluded that fitting coefficients of numerical calculation result was smaller than theoretical result because of wavelet arrangement and filling ratio.
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Yi Tan, Xinyang Li, "Numerical analysis of beam quality factor β on coherent combination of multiple laser beams", Proc. SPIE 8551, High-Power Lasers and Applications VI, 85511C (29 November 2012); doi: 10.1117/12.999816; https://doi.org/10.1117/12.999816
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KEYWORDS
Wavelets

Beam shaping

Wavefront aberrations

Coherent beam combination

Numerical simulations

Adaptive optics

Fourier transforms

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