29 September 2004 Interferometric sensing for drag-free satellites
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We discuss a polarisation based homodyne interferometer that demonstrates a promising sensitivity of approximately 3x10-12 m/Hz1/2. This performance figure is limited above 10Hz by the resolution of the current analogue-to-digital converter (ADC). Sensitivity below 10Hz is influenced by environmental factors and / or noise inherent in the laser. We then describe the development of a compact interferometric sensor, undertaken at The University of Birmingham, discussing its application as a zero-stiffness sensor for drag-free satellites and suggest a geometry of electrostatic actuator also with zero-stiffness.
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Clive C. Speake, Clive C. Speake, Stuart Mark Aston, Stuart Mark Aston, } "Interferometric sensing for drag-free satellites", Proc. SPIE 5500, Gravitational Wave and Particle Astrophysics Detectors, (29 September 2004); doi: 10.1117/12.551677; https://doi.org/10.1117/12.551677

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