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Proceedings Article

Current progress on TPFI nulling architectures at Jet Propulsion Laboratory

[+] Author Affiliations
Robert O. Gappinger, J. K. Wallace, Randall D. Bartos, Daniel R. Macdonald, Kenneth A. Brown

Jet Propulsion Lab.

Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 590506 (September 09, 2005); doi:10.1117/12.618700
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From Conference Volume 5905

  • Techniques and Instrumentation for Detection of Exoplanets II
  • Daniel R. Coulter
  • San Diego, California, USA | July 31, 2005

abstract

Infrared interferometric nulling is a promising technology for exoplanet detection. Nulling research for the Terrestrial Planet Finder Interferometer has been exploring a variety of interferometer architectures at the Jet Propulsion Laboratory (JPL). Three architectures have been identified as having promise for achieving deeper broadband IR null depths. Previous nulling research concentrated on layouts using dispersive elements to achieve a quasi-achromatic phaseshift across the passband. However, use of a single glass for the dispersive phase shift method inherently limits the nulling bandwidth. JPL is researching use of multiple glass types to increase null depth and bandwidth. In order to pursue nulls over much broader wavelength regions, nondispersive interferometer architectures can be employed. Toward this end, JPL has been researching two reflective architectures as nulling interferometers. The key enabling technology for this and other nondispersive field flip architectures is single mode spatial filtering devices. We have obtained results with both pinhole spatial filtering and single mode fibers.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Robert O. Gappinger ; J. K. Wallace ; Randall D. Bartos ; Daniel R. Macdonald and Kenneth A. Brown
"Current progress on TPFI nulling architectures at Jet Propulsion Laboratory", Proc. SPIE 5905, Techniques and Instrumentation for Detection of Exoplanets II, 590506 (September 09, 2005); doi:10.1117/12.618700; http://dx.doi.org/10.1117/12.618700


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