Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Influence of fringe bending on the enhancement of the diffraction efficiency of bismuth silicate gratings recorded under strong modulation and applied electric fields

Not Accessible

Your library or personal account may give you access

Abstract

The diffraction efficiency of bismuth silicate photorefractive gratings recorded in a nonlinear regime (light modulation depth, ≃1) was numerically calculated; phase coupling and off-Bragg reading conditions were taken into account. We considered gratings recorded with different applied electric dc fields under strong light modulation. We calculated the amplitude and the phase of the refractive-index variation of the gratings by numerically solving first the material rate equations to obtain the phase and the amplitude of the space-charge field and then the wave coupling equations for writing. We also obtained numerical solutions of the wave coupling equations for reading, considering angular deviations from the Bragg condition and bending of the fringes along the thickness of the sample. The diffraction efficiency for a 2-cm bismuth silicate sample recorded with an applied electric field of 2.5 kV/cm and a light modulation depth of 0.9 can be enhanced from 14% to 70% by use of an angular deviation of 3×10-4 rad from the Bragg condition during reading.

© 2003 Optical Society of America

Full Article  |  PDF Article
More Like This
Optimization of the diffraction efficiency of Bi12SiO2 under strong modulation and applied electric fields

E. A. Garcı́a, I. Casar, and L. F. Magaña
J. Opt. Soc. Am. B 17(12) 1961-1966 (2000)

Effect of applied electric fields on the writing and the readout of photorefractive gratings

Raymond De Vré, Muthu Jeganathan, Jeffrey P. Wilde, and Lambertus Hesselink
J. Opt. Soc. Am. B 12(4) 600-614 (1995)

Effects of strong modulation on beam-coupling gain in photorefractive materials: application to B12SiO20

J. G. Murillo, L. F. Magaña, M. Carrascosa, and F. Agulló-López
J. Opt. Soc. Am. B 15(7) 2092-2098 (1998)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (14)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved