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Spreading and coherence properties of a rectangular multi-Gaussian Schell-model beam propagating in biological tissues

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Abstract

Based on the extended Huygens–Fresnel integral, the cross-spectral density function of a rectangular multi-Gaussian Schell-model (RMGSM) beam propagating in biological tissues has been derived, and the spreading properties and spectral degree of coherence of an RMGSM beam propagating in biological tissues were studied by using the numerical examples. The results show that an RMGSM beam propagating in biological tissues will first evolve into a rectangular flat-topped beam and then evolve into a Gaussian-like beam due to the influences of the turbulence of biological tissues. It is also found that an RMGSM beam with smaller coherence length can maintain the rectangular flat-topped beam spot at the longer propagation distance.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (11604038, 11404048, 11875096), the Natural Science Foundation of Liaoning Province (20180550099) and the Fundamental Research Funds for the Central Universities (3132019182, 3132019184).

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Authors and Affiliations

  1. Department of Physics, College of Science, Dalian Maritime University, Dalian, 116026, China

    D. J. Liu, H. Y. Zhong, H. M. Yin, A. Y. Dong, G. Q. Wang & Y. C. Wang

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  1. D. J. Liu
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  2. H. Y. Zhong
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  3. H. M. Yin
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  4. A. Y. Dong
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  5. G. Q. Wang
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  6. Y. C. Wang
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Correspondence to D. J. Liu or Y. C. Wang.

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Liu, D.J., Zhong, H.Y., Yin, H.M. et al. Spreading and coherence properties of a rectangular multi-Gaussian Schell-model beam propagating in biological tissues. Indian J Phys 95, 571–577 (2021). https://doi.org/10.1007/s12648-020-01726-2

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  • DOI: https://doi.org/10.1007/s12648-020-01726-2

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