We describe a simple-to-construct programmable direct-digital-synthesis-based controller for use with acousto-optic deflectors. Our controller corrects for nonlinear diffraction efficiency versus diffraction angle, provides superior stability, functionality, and configurability, and costs a fraction of commercially available systems. Using this instrument, we move a 1 µm diameter bead by 1-nm-sized steps and resolve these steps.
Friday, January 9, 2009
Precision optical trapping via a programmable direct-digital-synthesis-based controller for acousto-optic deflectors
A. H. Mack, M. K. Trías, and S. G. J. Mochrie
We describe a simple-to-construct programmable direct-digital-synthesis-based controller for use with acousto-optic deflectors. Our controller corrects for nonlinear diffraction efficiency versus diffraction angle, provides superior stability, functionality, and configurability, and costs a fraction of commercially available systems. Using this instrument, we move a 1 µm diameter bead by 1-nm-sized steps and resolve these steps.
We describe a simple-to-construct programmable direct-digital-synthesis-based controller for use with acousto-optic deflectors. Our controller corrects for nonlinear diffraction efficiency versus diffraction angle, provides superior stability, functionality, and configurability, and costs a fraction of commercially available systems. Using this instrument, we move a 1 µm diameter bead by 1-nm-sized steps and resolve these steps.
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