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The modified SRRS threshold criteria for high peak power laser pulses in long air-path transmission considering the near-field beam quality

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Abstract

This paper demonstrates that the stimulated rotational Raman scattering (SRRS) threshold for high peak power laser pulses propagating through a long air path can be influenced strongly by the near-field quality of the laser beams, and the relationship between the SRRS threshold and the near-field beam quality (i.e., spatial intensity modulation index and contrast ratio) can be evaluated quantitatively. By using our three-dimensional numerical model, which can describe the spatial–temporal evolution behaviors of SRRS and is verified by previously published SRRS experimental data, the criteria of the safe transmission distance for high peak power nanosecond laser pulses are obtained, and the modified SRRS threshold criterion formulas considering the near-field beam conditions are presented.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant No. 61008004) and China Postdoctoral Science Foundation funded project (Grant No. 201104397).

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Correspondence to D. Y. Lin or Z. W. Lu.

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Zhu, C.Y., Lin, D.Y., Lu, Z.W. et al. The modified SRRS threshold criteria for high peak power laser pulses in long air-path transmission considering the near-field beam quality. Appl. Phys. B 122, 272 (2016). https://doi.org/10.1007/s00340-016-6544-3

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  • DOI: https://doi.org/10.1007/s00340-016-6544-3

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