Nulling interferometry: symmetry requirements and experimental results

Eugene Serabyn

doi:10.1117/12.390223

Abstract

This paper provides a derivation from first principles of the stringent symmetry and stability requirements which deep stellar nulling demands, and also includes a brief status report on recent nulling results obtained with the Jet Propulsion Laboratory's fiber-coupled rotational-shearing interferometer. To date, the deepest transient nulls obtained (at red wavelengths) are 2 X 10^-6 with a laser diode source, and 1.4 X 10^-5 with a single- polarization thermal white-light source filtered to provide an 18% passband. In addition, both the laser and white light nulls have been stabilized to the 10^-4 level. This visible wavelength laboratory nuller thus meets essentially all of the performance goals for the planned nulling experiment on board NASA's Space Interferometer Mission, with the sole exception of dual-polarization operation.

Citation Download Citation

Eugene Serabyn, "Nulling interferometry: symmetry requirements and experimental results", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390223; https://doi.org/10.1117/12.390223

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