Abstract
Using a new optical configuration free from the influence of photorefractive optical nonlinearity, we investigate the main characteristics of the spatial subharmonic K/2 excited in a Bi12SiO20 crystal by a light-intensity pattern with wave vector K and frequency O. It is shown that in a large region of intensity and applied electric field the optimum value O of the frequency corresponds to the conditions of parametric excitation of the weakly damped eigenmodes of the medium: the space-charge waves. The threshold and above-threshold characteristics of the subharmonic regime are in good agreement with the theory.
| Original language | English |
|---|---|
| Pages (from-to) | 1621-1627 |
| Number of pages | 7 |
| Journal | Journal of the Optical Society of America B |
| Volume | 12 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 Sept 1995 |
Bibliographical note
This paper was published in Journal of the Optical Society of America B - Optical Physics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-12-9-1621. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. © 1995 Optical Society of America.Keywords
- optical configuration
- photorefractive optical nonlinearity
- spatial subharmonic K/2
- Bi12SiO20 crystal
- light-intensity pattern
- wave vector K
- frequency Ω
- space-charge waves
- subharmonic regime