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Spectral changes of coherently combined diffracted chirp Gaussian pulse array beams propagating in turbulent atmosphere
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DOI：10.1080/09500340.2026.2616782.png)
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Abstract
En 中文
The spectral change properties of coherently combined diffracted chirp Gaussian pulse array (CCDCGPA) beams in turbulent atmosphere are studied in comparison with those of spectrum in free space. The analytical expression for spectral intensity of CCDCGPA beams propagating in turbulent atmosphere is derived based on the extended Huygens-Fresnel principle. Numerical results show that the on-axis and off-axis spectra of CCDCGPA beams propagating in turbulent atmosphere are changed into Gaussian-like profile more quickly compared to those propagating in free space, and these spectra for free space and turbulent atmosphere are almost superposed at the sufficiently far propagation distance. The results also indicate that the spectral changes are connected with the propagation distance in the given condition, the size of aperture, the array parameters (N,d) and beam parameters (C,T). Our research results will be helpful for comparing with spectral measurements, and can find applications in free space and atmospheric optical communication.
Keywords:
Coherently combined diffracted chirp Gaussian pulse array (CCDCGPA) beam
turbulent atmosphere
spectral shift
spectral switch
Journal
J
IF:
0.8
Papers:
76
Citations:
4.8K
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