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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 12 — Jun. 8, 2009
  • pp: 10206–10222

Spectral uniformity of two- and four-level diffractive optical elements for spectroscopy.

Hallvard Angelskår, Ib-Rune Johansen, Matthieu Lacolle, Håkon Sagberg, and Aasmund S. Sudbø  »View Author Affiliations

Optics Express, Vol. 17, Issue 12, pp. 10206-10222 (2009)

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We present simulations and characterization of gold coated diffractive optical elements (DOEs) that have been designed and fabricated in silicon for an industrial application of near-infrared spectroscopy. The DOE design is focusing and reflecting, and two-level and four-level binary designs were studied. Our application requires the spectral response of the DOE to be uniform over the DOE surface. Thus the variation in the spectral response over the surface was measured, and studied in simulations. Measurements as well as simulations show that the uniformity of the spectral response is much better for the four-level design than for the two-level design. Finally, simulations and measurements show that the four-level design meets the requirements of spectral uniformity from the industrial application, whereas the simulations show that the physical properties of diffraction gratings in general make the simpler two-level design unsuitable.

© 2009 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(230.3990) Optical devices : Micro-optical devices
(300.6190) Spectroscopy : Spectrometers
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:

Original Manuscript: April 22, 2009
Revised Manuscript: May 29, 2009
Manuscript Accepted: May 29, 2009
Published: June 3, 2009

Hallvard Angelskår, Ib-Rune Johansen, Matthieu Lacolle, Håkon Sagberg, and Aasmund S. Sudbø, "Spectral uniformity of two- and four-level diffractive optical elements for spectroscopy," Opt. Express 17, 10206-10222 (2009)

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