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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 23 — Nov. 15, 2004
  • pp: 5675–5683

Design of array of diffractive optical elements with inter-element coherent fan-outs

Johan Stigwall and Jörgen Bengtsson  »View Author Affiliations

Optics Express, Vol. 12, Issue 23, pp. 5675-5683 (2004)

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Building on the optimal-rotation-angle method, an algorithm for the design of inter-element coherent arrays of diffractive optical elements (DOEs) was developed. The algorithm is intended for fan-out DOE arrays where the individual elements fan-out to a sub-set of points chosen from a common set of points. By iteratively optimizing the array of elements as a whole the proposed algorithm ensures that the light from neighbouring elements is in-phase in all fan-out points that are common to neighbouring DOEs. This is important in applications where a laser beam scans the DOE array and the fan-out intensities constitute a read-out of information since the in-phase condition ensures a smooth transition in the read-out as the beam moves from one DOE to the next. Simulations show that the inter-element in-phase condition can be imposed at virtually no expense in terms of optical performance, as compared to independently designed DOEs.

© 2004 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(090.1760) Holography : Computer holography
(100.5090) Image processing : Phase-only filters
(200.2610) Optics in computing : Free-space digital optics

ToC Category:
Research Papers

Original Manuscript: September 3, 2004
Revised Manuscript: November 4, 2004
Published: November 15, 2004

Johan Stigwall and Jörgen Bengtsson, "Design of array of diffractive optical elements with inter-element coherent fan-outs," Opt. Express 12, 5675-5683 (2004)

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