Large deflection angle fan-out element based on dislocated grating array

We study the possibility of designing and fabricating a fan-out element bas ed on a computer-generated hologram (CGH) which is capable of providing a l arge deflection angle without using excessively small CGH cells. The recent development of CGHs using dislocated grating arrays was employed to design the fan-out element. Experimental results show that a deflection angle of 41 degrees was achieved using a CGH cell size of 10 mu m x 10 mu m and an o perating optical wavelength of 0.98 mu m Further experimental results and t heoretical analysis are also presented in order to investigate the characte ristics of this type of fan-out element. (C) 1999 Published by Elsevier Sci ence B.V. All rights reserved.