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Applied Optics

Applied Optics


  • Vol. 38, Iss. 34 — Dec. 1, 1999
  • pp: 7128–7132

Deep nulling of visible laser light

E. Serabyn, J. K. Wallace, G. J. Hardy, E. G. H. Schmidtlin, and H. T. Nguyen  »View Author Affiliations

Applied Optics, Vol. 38, Issue 34, pp. 7128-7132 (1999)

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Nulling interferometry, a proposed technique for dimming a star relative to its surroundings by destructively interfering the light collected by two individual telescopes [Bracewell, Nature 274, 780–781 (1978); ShaoColavita, Ann. Rev. Astron. Astrophys. 30, 457–498 (1992)], has the potential to permit the direct detection of nearby extrasolar planets. However, because of the extremely high degree of symmetry required for useful levels of starlight nulling, the technique remains in its infancy. We present results of laboratory experiments with a rotational shearing interferometer that are aimed at demonstrating the feasibility of deep nulling at the levels needed for direct planet detection. Our first results include the successful nulling of red laser light to a part in 105 and the stabilization of the null leakage to a part in 104.

© 1999 Optical Society of America

OCIS Codes
(260.3160) Physical optics : Interference
(350.1260) Other areas of optics : Astronomical optics

Original Manuscript: May 17, 1999
Revised Manuscript: August 31, 1999
Published: December 1, 1999

E. Serabyn, J. K. Wallace, G. J. Hardy, E. G. H. Schmidtlin, and H. T. Nguyen, "Deep nulling of visible laser light," Appl. Opt. 38, 7128-7132 (1999)

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  1. R. N. Bracewell, “Detecting nonsolar planets by spinning infrared interferometer,” Nature 274, 780–781 (1978). [CrossRef]
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  9. E. Serabyn, “Nanometer-level path-length control scheme for nulling interferometry,” Appl. Opt. 38, 4213–4216 (1999). [CrossRef]
  10. E. Serabyn, J. K. Wallace, H. T. Nguyen, E. G. H. Schmidtlin, G. J. Hardy, “Nulling interferometry: working on the dark fringe,” in Working on the Fringe, S. C. Unwin, R. V. Stachnick, eds., ASP Conference Series (Astronomical Society of the Pacific, San Francisco, 1999), in press.
  11. C. A. Beichman, N. J. Woolf, C. A. Lindensmith, “The terrestrial planet finder (TPF): a NASA origins program to search for habitable planets,” (Jet Propulsion Laboratory, Pasadena, Calif., 1999).

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