Files

Download

Download Full Text (950 KB)

Description

Digital holography (DH) has many applications in science and engineering, especially in the recreation and display of 3D images of objects. DH is able to reconstruct the three-dimensional surface by processing holographic data recorded on a charge coupled device (CCD). Holographic data can also be recorded in a photorefractive (PR) material. In fact, dynamic real-time holographic interferometry (RHI) can be implemented by using PR materials. To implement RHI using PR materials, two beams, one called a pump and one called the object beam are introduced onto a PR material to write the hologram of the object. During the hologram writing process, these beams can couple in intensity and/or phase which thereafter are responsible for self-diffraction of these incident beams, and can also give rise to Bragg and non-Bragg orders. In this work, the exact solutions to the interaction equations of Bragg and non-Bragg orders in a PR material for the case of interacting angular spectra are obtained by numerically solving them in MATLAB©. An iron doped lithium niobate crystal is used as an example of a PR material and an incident wavelength of 514 nm is assumed. Experimentally, it has been observed that when the angle between the two incident beams is small, typically a few degrees, multiple non-Bragg orders are generated. For numerical simulations, only the interactions between the spectra of two incident optical beams (Bragg orders) and two non-Bragg orders are considered. Different beam profiles such as Gaussian and flat-tops are considered as incident beams and the spatial evolution of both Bragg and non-Bragg orders as well as their relative phase shifts are numerically obtained.

Publication Date

4-9-2016

Project Designation

Graduate Research

Primary Advisor

Partha P Banerjee

Primary Advisor's Department

Electro Optics Grad Program

Keywords

Stander Symposium poster

DYNAMIC HOLOGRAPHY USING PHOTOREFRACTIVE MATERIALS: APPLICATIONS TO 3D VISUALIZATION AND IMAGE PROCESSING

Share

COinS