Propagation properties of a partially coherent anomalous hollow vortex beam in underwater oceanic turbulence

• Published in: Optics communications 2019-04, Vol.437, p.346-354
• Main Authors: Liu, Dajun, Wang, Guiqiu, Yin, Honming, Zhong, Haiyang, Wang, Yaochuan
• Format: Article
• Language: English
• Subjects: Average intensity; Dark hollow beam; Laser propagation; Vortex beam
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2019.01.006

Based on the extended Huygens–Fresnel principle, the cross-spectral density function of a partially coherent anomalous hollow vortex beam (AHVB) propagating in underwater oceanic turbulence has been derived, and the influences of the beam parameters and underwater oceanic turbulence on the average intensity and coherence properties are investigated by using numerical examples. Our results show that the partially coherent AHVB with smaller coherence length and smaller M will evolve into the flat-topped faster as the propagation distance increases, and the partially coherent AHVB propagating in stronger underwater oceanic turbulence (the larger χT and ς or the smaller ε) will lose the initial dark hollow center and evolve into the Gaussian beam more rapidly. In the influences of oceanic turbulence on the spreading of partially coherent AHVB, it is found that the parameters χT and ς will cause the larger spreading than the parameter ε at the same propagation distance. This research is useful to the practical application of the partially coherent AHVB beam in underwater oceanic turbulence.