title: Iterative algorithm for the design of free-space diffractive optical elements for fiber coupling.
abstract: We present a design method based on the Gerchberg-Saxton algorithm for the design of high-performance diffractive optical elements. Results from this algorithm are compared with results from simulated annealing and the iterative Fourier-transform algorithm. The element performance is comparable with those designed by simulated annealing, whereas the design time is similar to the iterative Fourier-transform method. Finally, we present results for a demanding beam-shaping task that was beyond the capabilities of either of the traditional algorithms. The element performances demonstrate greater than 85% efficiency and less than 2% uniformity error.
authors.affiliation: School of Engineering and Physical Sciences, Heriot-Watt University, David Brewster Building, Riccarton, Edinburgh, EH14 4AS UK. m.thomson@hw.ac.uk
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Thomson
authors.forename: Jinsong
authors.initials: J
authors.lastname: Liu
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Taghizadeh