Spatial resolutions for applying photorefractive polymers to diffractive elements

Spatial resolutions of diffracted beams by photorefractive polymers are investigated in detail for applying the polymers to diffractive optical elements. The coupled wave equations for the four-wave mixing in photorefractive polymers and their solutions by applying the two-beam coupling approximatio...

Full description

Saved in:
Bibliographic Details
Published in:Journal of modern optics 2009-07, Vol.56 (12), p.1323-1334
Main Authors: Okamoto, Atsushi, Harasaka, Kazuhiro, Bunsen, Masatoshi, Takabayashi, Masanori, Rokutanda, Shuji
Format: Article
Language:English
Subjects:
Diffraction
diffraction efficiency
Exact sciences and technology
Experiments
four-wave mixing
Fundamental areas of phenomenology (including applications)
Nonlinear optics
Numerical analysis
Optical materials
Optics
orientational enhancement effect
Other nonlinear optical materials
photorefractive and semiconductor materials
Phase conjugation, optical mixing
photorefractive and kerr effects
photorefractive polymers
Physics
Polymers
Polymers and organics
spatial resolution
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Spatial resolutions of diffracted beams by photorefractive polymers are investigated in detail for applying the polymers to diffractive optical elements. The coupled wave equations for the four-wave mixing in photorefractive polymers and their solutions by applying the two-beam coupling approximation are derived taking the orientational enhancement effect into consideration. Characteristics of the diffraction efficiency of the polymers for the applied electric field, the incident angles of beams, the incident radiation intensity and the polarization are clarified. Furthermore, resolutions of diffracted images with the polymers are discussed by a numerical analysis from the viewpoint of the Bragg diffraction in a spatial frequency domain. An experiment with the TPD (tetra-phenyl-diphenyldiamine) acrylate based photorefractive polymers and the USAF test target is also performed to measure the spatial resolution of two-dimensional images diffracted by the polymer and to verify the calculated results. It is revealed that high resolution over 50 lp mm −1 can be obtained with sufficient diffraction efficiency in the case of the polymer thickness of several 10 µm.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340903075410