| Autor: |
Vorontsov, M. A., Carhart, G. W. |
| Zdroj: |
Optics Letters; December 2002, Vol. 27 Issue: 24 p2155-2157, 3p |
| Abstrakt: |
We introduce beam-quality metrics for adaptive wave-front control that permit estimation of the degree of laser beam energy concentration on a remotely located extended object based upon the backscattered wave intensity distribution at the receiver. A 37-control-channel adaptive optics system with phase correction of the output wave capable of operating in the presence of speckle-field-induced strong intensity modulation is presented. System operation is based on optimization of the speckle-field-based metric by the stochastic parallel gradient descent technique. Results demonstrate that adaptive wave-front correction using speckle-field-based beam-quality metrics can significantly improve laser beam concentration on extended objects. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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