1. Automatic alignment of a rigid spacer cavity.
- Author
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Albert Romann, David Rabeling, Glenn de Vine, Jong Chow, Malcolm Gray, and David McClelland
- Abstract
A bench-top auto-alignment system employing an invariant Gouy phase telescope is described in this paper. Our system uses external galvanometer-actuated mirrors for the tilt and offset control of a laser beam onto a rigid spacer cavity. Wavefront sensing diagnostics which accurately decouple tilt and offset er-rors are employed, and corresponding orthogonal corrections are enabled with the aid of electronic nulling. The closed loop system achieves an alignment fluctua-tion suppression of 50.4 dB for angular tilt and 58.3 dB for lateral offset at 1 Hz, with a unity gain bandwidth in excess of 115 Hz. [ABSTRACT FROM AUTHOR]
- Published
- 2005
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