Abstract
Air refractive index fluctuation () is one of the largest uncertainty sources in precision interferometry systems that require a resolution of nanometer order or less. We introduce a method for the active suppression of inside a normal air-environment chamber using a Fabry–Perot cavity and a piezoelectric volume actuator. The temporal air refractive index () at a local point is maintained constant with an expanded uncertainty of (), a sufficiently low uncertainty for precise measurements unaffected by to be made inside a chamber.
© 2010 Optical Society of America
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