Optical resonator with direct geometric access to the optical axis
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United States of America Patent
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Mar 24, 2015
Grant Date -
Jan 2, 2014
app pub date -
Dec 21, 2011
filing date -
Jan 10, 2011
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Abstract
The present invention relates to a stable optical cavity, in which an obstacle is formed or arranged on the optical axis in the form of a through-opening in one of the mirrors or of an input- or output-coupling element, in order to enable a direct geometric access to the optical axis. The mirrors of the cavity are arranged such that a degeneracy of a plurality of transverse eigenmodes of the cavity occurs without an obstacle, by the combination of which an intensity minimum is obtained in the cavity with an obstacle at the position of the through-opening or of the input- or output-coupling element. With this configuration an optical cavity of high finesse which has a position of maximum intensity on the optical axis can be realized.
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