Investigation of turbulence thermal blooming interaction using the split-step beam propagation method

Connor E. Murphy; Mark F. Spencer

doi:10.1117/12.2319869

18 September 2018 Investigation of turbulence thermal blooming interaction using the split-step beam propagation method

Connor E. Murphy, Mark F. Spencer

Proceedings Volume 10772, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018; 1077208 (2018) https://doi.org/10.1117/12.2319869
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

This study uses the split-step beam propagation method (BPM) to look at the Monte Carlo statistics associated with increasing strengths of turbulence and steady state thermal blooming (SSTB). To help quantify the strength of the turbulence and SSTB, the analysis makes use of two parameters: the analytical log-amplitude variance and the distortion number. These parameters simplify greatly given horizontal-propagation paths with constant index-of-refraction structure coefficients and extinction coefficients. As such, the goal throughout is to characterize the impact of turbulence thermal blooming interaction (TTBI) in terms of multiple metrics of interest. These metrics include the spatial-structure function, magnitude of the complex degree of coherence, and log-amplitude variance. The results show that the presence of thermal blooming causes the log- amplitude variance to increase significantly from the theoretical value. This outcome leads to an interesting trade-space analysis with respect to TTBI.

Conference Presentation

Citation Download Citation

Connor E. Murphy and Mark F. Spencer "Investigation of turbulence thermal blooming interaction using the split-step beam propagation method", Proc. SPIE 10772, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2018, 1077208 (18 September 2018); https://doi.org/10.1117/12.2319869

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