Contributors to laser backscatter

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In addition to Rayleigh and Mie scattering, Thomson scattering from ionized particles is identified as a potential contributor to laser backscatter in the lower atmosphere. The discussion highlights that high-energy lasers can lead to non-linear optical effects, which may introduce additional scattering mechanisms. Participants emphasize the complexity of interactions occurring at high power levels. The exploration of these phenomena is crucial for understanding laser propagation and its implications. Overall, the conversation underscores the need for further investigation into various scattering mechanisms affecting laser backscatter.
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Other than Rayleigh and to a lesser extent Mie scattering what other mechanisms might exist that would contribute to backscatter for a high energy laser propagating through the lower atmosphere?
 
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