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Automatic alignment of a rigid spacer cavity

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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.

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Authors and Affiliations

  1. Centre for Gravitational Physics, Faculty of Science, The Australian National University, Canberra, 0200, Australia

    Albert Romann, David S. Rabeling, Glenn de Vine, Jong H. Chow, Malcolm B. Gray & David E. McClelland

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  1. Albert Romann
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  2. David S. Rabeling
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  3. Glenn de Vine
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  4. Jong H. Chow
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  5. Malcolm B. Gray
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  6. David E. McClelland
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Corresponding author

Correspondence to David E. McClelland.

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Romann, A., Rabeling, D.S., de Vine, G. et al. Automatic alignment of a rigid spacer cavity. Gen Relativ Gravit 37, 1591–1599 (2005). https://doi.org/10.1007/s10714-005-0145-5

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  • DOI: https://doi.org/10.1007/s10714-005-0145-5

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