Abstract
Propagation of coherent combined laser beams in turbulent atmosphere is
numerically studied based on the extended Huygens-Fresnel principle. By choosing
beam propagation factor (BPF) and beam quality factor (BQ) to characterize the
far-field irradiance distribution properties, the influence of turbulence on
far-field coherent combined beam quality is studied in detail. The investigation
reveals that with the coherence length decreasing, the irradiance distribution
pattern evolves from typical non-Gaussian shape with multiple side-lobes into
Gaussian shape which is seen in the incoherent combining case. In weak turbulent
atmosphere, the far-field beam quality suffers less when the laser array gets more
compact and operates at a longer wavelength. In strong turbulent atmosphere, the
far-field beam quality degrades into the incoherent combining case without any
relationship with the fill factor and laser wavelength.
© 2008 Chinese Optics Letters
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription