Optimum even-phase four-beam multiplier

The even-phase diffractive optical element that produces four equi-intense diffraction orders with maximum efficiency is derived. A full-wave electromagnetic analysis is performed to study the behavior of the device in the resonance domain. Moreover, such full-wave analysis agrees with the scalar pr...

Full description

Saved in:
Bibliographic Details
Published in:Optical Engineering 2002-11, Vol.41 (11), p.2736-2742
Main Authors: Borghi, Riccardo, Frezza, Fabrizio, Pajewski, Lara, Santarsiero, Massimo, Schettini, Giuseppe
Format: Article
Language:English
Subjects:
diffractive optical elements
phase gratings
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The even-phase diffractive optical element that produces four equi-intense diffraction orders with maximum efficiency is derived. A full-wave electromagnetic analysis is performed to study the behavior of the device in the resonance domain. Moreover, such full-wave analysis agrees with the scalar prediction in the limit of very large values of the grating period. Design curves for the transmission efficiency as a function of the grating period and of the incidence angle are presented. The effects of quantization of the phase profile to a discrete number of phase levels are considered. The optimization of a simple structure with only four phase levels is reported, showing good results in terms of diffraction efficiency and angular bandwidth. ©
ISSN:0091-3286
1560-2303
DOI:10.1117/1.1510536