Some aspects of simulation and realization of an optical reference cavity

Details Some aspects of simulation and realization of an optical reference cavity Some aspects of simulation and realization of an optical reference cavity

2009-11-06

arxiv.org/abs/0911.1290v1

Physics

Optics

accepted for publication in Physical Review A

Scientific paper

The interrogation of an ultra-narrow clock transition of a single trapped ion for optical frequency metrology requires a laser stabilized to a couple of Hz per second with a linewidth of the same order of magnitude. Today, lasers in the visible have reached the Hz-range in frequency stability, if locked onto a high-finesse, ultra-stable reference cavity. Vertical mounting of the reference cavity can reduce its sensitivity to vibrations as described in \cite{notcutt05}. We have designed a comparable vertical cavity with an overall length of 150 mm resulting in a Free Spectral Range of 1GHz. Optimisation of the cavity design has been carried out with a Finite-Elements Method, leading to expected relative length variations below 10$^{-14}$ under the influence of gravity acceleration (1 $g$). The variation of different geometric parameters has been studied. The analysis of the different noise sources shows that, for a regime superior to a tenth of a hertz, the fast linewidth of the laser will not be limited by the cavity characteristics.

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