C C Speake and S M Aston 2005 Class. Quantum Grav. 22 S269 doi:10.1088/0264-9381/22/10/019
C C Speake and S M Aston
Show affiliationsWe describe a compact interferometer, under development at the University of Birmingham, that could be employed as a zero-stiffness sensor for drag-free satellites. A prototype bench-top polarization-based homodyne interferometer is discussed that achieves a shot-noise limited displacement sensitivity of 3 × 10−12 m Hz1/2 above 60 Hz. We discuss a wavelength modulation technique that will render the interferometer more robust as it enables the absolute difference in interferometric armlengths to be determined.
Issue 10 (21 May 2005)
Received 31 October 2004, in final form 18 January 2005
Published 26 April 2005
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