Coherent area inside partially coherent laser beam through atmospheric and sea water turbulences

Wei Lu; Liren Liu; De'an Liu; Jianfeng Sun; Aimin Yan

doi:10.1117/12.793977

19 August 2008 Coherent area inside partially coherent laser beam through atmospheric and sea water turbulences

Wei Lu, Liren Liu, De'an Liu, Jianfeng Sun, Aimin Yan

Proceedings Volume 7091, Free-Space Laser Communications VIII; 70910U (2008) https://doi.org/10.1117/12.793977
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

Degree of coherence of partially coherent beam is degraded when it propagates through atmospheric turbulence, remaining a very small coherent area inside the beam. Such small coherent area is not enough for the applications of laser communications and laser radar where a rather large coherent area is necessary for the optical imaging, especially for the heterodyne detection. In this paper, we start from cross-spectral density matrix of partially coherent beam on propagation through turbulence. Ratio of energy degradation is defined to represent the effect of residual coherent area inside the partially coherent laser beam. And we also give the evolvement of the residual coherent area inside partially coherent laser beam through channels involving atmospheric and sea water turbulences, respectively.

Citation Download Citation

Wei Lu, Liren Liu, De'an Liu, Jianfeng Sun, and Aimin Yan "Coherent area inside partially coherent laser beam through atmospheric and sea water turbulences", Proc. SPIE 7091, Free-Space Laser Communications VIII, 70910U (19 August 2008); https://doi.org/10.1117/12.793977

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