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Effects of underwater turbulence on laser beam propagation and coupling into single-mode optical fiber

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Abstract

We characterize and compare the effects of turbulence on underwater laser propagation with theory. Measurements of the coupling efficiency of the focused beam into a single-mode fiber are reported. A simple tip-tilt control system, based on the position of the image centroid in the focal plane, was shown to maintain good coupling efficiency for a beam radius equal to the transverse coherence length, r0. These results are relevant to high bandwidth communication technology that requires good spatial mode quality.

© 2010 Optical Society of America

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