Share Email Print

Proceedings Paper

Coherent Image Amplification And Optical Phase Conjugation With Photorefractive Materials
Author(s): P. Gunter
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The electric field and fringe spacing dependence of the stationary energy transfer between two writing beams in volume phase-hologram formation with photoconductive electro-optic materials (KNb03:Fe2+, Bi12(Si,Ge)020,...) has been studied. Experimental results are compared with the theoretical expressions describing the influence of the different photoinduced space-charge fields in photorefractive media. A peak exponential gain of Γ= 15 cm-1 has been reached in KNb03:Fe2+ for the proper choice of experimental parameters such as recording wavelength, fringe spacing, applied electric field etc.). Results of the electric field dependence of the wavefront reflectivity ρ in degenerate four-wave mixing experiments are reported and discussed in terms of a similar theoretical treatment as the two-wave mixing experiments. It is shown, that peak reflectivities of ρ = 25 percent have been reached for KNb03:Fe2+, that conjugate complex wavefronts can be generated and that distorted optical wave-fronts can be effectively corrected by four-wave mixing experiments in KNb03:Fe2+.

Paper Details

Date Published: 16 June 1983
PDF: 7 pages
Proc. SPIE 0369, Max Born Centenary Conf, (16 June 1983); doi: 10.1117/12.934373
Show Author Affiliations
P. Gunter, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 0369:
Max Born Centenary Conf
M. John Colles; D. William Swift, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?