Analysis of design strategies for Dammann gratings

Monica Goel; David L. Naylor

doi:10.1117/12.239636

7 May 1996 Analysis of design strategies for Dammann gratings

Monica Goel, David L. Naylor

Proceedings Volume 2689, Diffractive and Holographic Optics Technology III; (1996) https://doi.org/10.1117/12.239636
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Dammann gratings are binary phase diffractive optical elements that may be used to split an incoming beam of light into a one- or two-dimensional array of beams. The 1D gratings can be designed for different numbers of diffraction orders (N). For a given value of N there are 2^(N-1 possible 1D solutions. Each solution is distinguished by a particular sign combination of the phases of the diffraction orders and is obtained by optimizing the N adjustable length elements in the grating design. The number of iterations required and the likelihood of converging on a solution is strongly dependent upon the starting point of the iterative process. In an effort to produce an efficient way of designing the gratings for larger N, a methodology to select the starting point was developed. The relationship between efficiency and sign combination of the phases was studied to determine which phase combinations were most likely to produce higher efficiency solutions.

Citation Download Citation

Monica Goel and David L. Naylor "Analysis of design strategies for Dammann gratings", Proc. SPIE 2689, Diffractive and Holographic Optics Technology III, (7 May 1996); https://doi.org/10.1117/12.239636

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