Article
Propagation Characteristics of a Focused Laser Beam in a Strontium Barium Niobate Photorefractive Crystal Under Reverse External Electric Field
Applied Optics
(2014)
Abstract
The propagation characteristics of a focused laser beam in a SBN:75 photorefractive crystal strongly depend on the signal-to-background intensity ratio (R=Is/Ib) under reverse external electric field. In the range 20 >R > 0.05, the laser beam shows enhanced self-defocusing behavior with increasing external electric field, while it shows self-focusing in the range 0.03 >R > 0.01. Spatial solitons are observed under a suitable reverse external electric field for R=0.025. A theoretical model is proposed to explain the experimental observations, which suggest a new type of soliton formation due to “enhancement” not “screening” of the external electrical field.
Keywords
- Spatial solitons,
- Photorefractive optics,
- Photorefractive materials,
- Laser beam shaping,
- Waveguides
Disciplines
Publication Date
October 1, 2014
Publisher Statement
For complete list of authors, please see article.
Citation Information
Paul J. Simmonds. "Propagation Characteristics of a Focused Laser Beam in a Strontium Barium Niobate Photorefractive Crystal Under Reverse External Electric Field" Applied Optics Vol. 53 Iss. 28 (2014) Available at: http://works.bepress.com/paul_simmonds/61/