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Adaptive nulling : a new enabling technology for interferometric exoplanet

Show simple item record Lay, Oliver P. Jeganathan, Muthu Peters, Robert 2007-10-01T20:44:29Z 2007-10-01T20:44:29Z 2003-08-03
dc.identifier.citation The International Society for Optical Engineering (SPIE), International Symposium on Optical Science and Technology, San Diego, California, August 3-8, 2003 en
dc.identifier.clearanceno 03-1873
dc.description.abstract Deep, stable nulling of starlight requires careful control of the amplitudes and phases of the beams that are being combined. The detection of earth-like planets using the interferometer architectures currently being considered for the Terrestrial Planet Finder mission require that the E-field amplitudes are balanced at the level of ~ 0.1%, and the phases are controlled at the level of 1 mrad (corresponding to ~1.5 nm for a wavelength of 10 μm). These conditions must be met simultaneously at all wavelengths across the science band, and for both polarization states, imposing unrealistic tolerances on the symmetry between the optical beamtrains. We introduce the concept of a compensator that is inserted into the beamtrain, which can adaptively correct for the mismatches across the spectrum, enabling deep nulls with realistic, imperfect optics. The design presented uses a deformable mirror to adjust the amplitude and phase of each beam as an arbitrary function of wavelength and polarization. A proof-of-concept experiment will be conducted at visible / near-IR wavelengths, followed by a system operating in the Mid-IR band. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 952992 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003 en
dc.subject nulling interferometry en
dc.subject planet detection en
dc.title Adaptive nulling : a new enabling technology for interferometric exoplanet en
dc.type Preprint en

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