TPF-I SWG Report - Exoplanet Exploration Program - NASA

C HAPTER 6
(N pix = 256) on the interferometer described above (D = 4 m, λ = 10 μm), θ FOV = 79 arcsec, a good match
to the requirements outlined in Table 6-5.
The critical technology for wide field-of-view double Fourier interferometry is already mature. Detector
arrays such as those aboard the Spitzer Space Telescope (IRAC and IRS instruments), the Wide-field
Infrared Survey Explored (WISE) mission, and their planned successors are well suited for this
application, both in sensitivity and pixel count. The moving scan mechanism in the Composite Infrared
Spectrometer (CIRS) on the Cassini mission provides ~10 cm scan range. FTS scan mechanism
technology has extensive heritage in space.
Caveat: The double-Fourier method is best suited for low to moderate spectral resolution. Resolution in
the R = 10 4 –10 6 range is attainable with the double-Fourier method, but a long-delay line stroke is
required, and the sensitivity is poorer than that available via dispersive methods and may be inadequate
for certain sources and spectral lines.
6.5 Bibliography
6.5.1 References for Figure 6-1
Bokhove, H., Kappelhof, J. P., Vink, H. J. P., Vosteen, L. L. A., Sodnik, Z., “Broadband nulling using a
prism phase shifter,” Towards Other Earths: Darwin/TPF and the Search for Extrasolar
Terrestrial Planets, edited by M. Fridlund, T. Henning, ESA SP-539, European Space Agency,
Noordwijk, The Netherlarnds, 367–369 (2003).
Brachet, F., Labèque, A., Léger, A., Ollivier, M., Lizambert, C., Hervier, V., Chazelas, B., Pellet, B.,
Lépine, T., Valette, C., “Nulling interferometry for the Darwin misison: Polychromatic laboratory
test bench,” New Frontiers in Stellar Interferometry, edited by W. A. Traub, Proc. SPIE 5491,
991–998 (2004).
Buisset, C., Rejeaunier, X., Rabbia, Y., Ruilier, C., Barillot, M., Lierstuen, L., Perdigues Armengol, J. M.,
“Multi-axial nulling interferometry: Demonstration of deep nulling and investigations of
polarization effects, ” Advances in Stellar Interferometry, edited by J. D. Monnier, M. Schöller,
W. C. Danchi, Proc. SPIE 6268, 626819 (2006).
Ergenzinger, K., Flatscher, R., Johann, U., Vink, R., Sodnik, Z., “EADS Astrium nulling interferometer
breadboard for Darwin and GENIE,” Proc. Int. Conf. Space Optics 2004. ESA SP-554, European
Space Agency, Noordwijk, The Netherlarnds, 223–230 (2004).
Haguenauer, P., Serabyn, E., “Deep nulling of laser light with a single-mode-fiber beam combiner,” Appl.
Opt. 45, 2749–2754 (2006).
Martin, S. R., Serabyn, E., Hardy, G. J., “Deep nulling of laser light in a rotational shearing
interferometer,” Interferometry for Optical Astronomy II, edited by W. A. Traub, Proc. SPIE
4838, 656–667 (2003).
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