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Spot size and Guoy phase invariant telescope for auto-alignment of resonant cavities

Jong H Chow1, David Rabeling2, Malcolm B Gray1, David E McClelland1 and Glenn de Vine1

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We present both the theory and an experimental method to accurately set up a Guoy phase telescope, where both the output spot size and orthogonality condition are invariant to distance from the cavity beam waist. We demonstrate that Gaussian spot size measurements can be used as a diagnostic to determine the desired locations of split area photodetectors. The Guoy phase invariance is verified using the tilt-locking technique.


PACS

04.80.Nn Gravitational wave detectors and experiments

95.55.-n Astronomical and space-research instrumentation

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 5 (7 March 2004)

Received 12 September 2003

Published 11 February 2004



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