Dynamic amplification as a reason of noise in LiNbO sub(3):Fe crystal

• Published in: Optics communications Vol. 188; no. 5-6; pp. 377 - 381
• Main Authors: Apolinar-Iribe, A, Korneev, N, Sanchez-Mondragon, J J
• Format: Journal Article
• Language: English
• Published: 01.02.2001
• ISSN: 0030-4018

The dynamic nature or permanent transient nature of noise formation in LiNbO sub(3) was studied. The angular distribution of noise for tilted incident pump beam was qualitatively explained by the strength of a grating written by a particular pair of waves. Two-wave mixing also suggested that the amount of dynamic noise existing in a crystal was sufficient to produce quite strong amplification. If the noise was really produced by the dynamic amplification, its reduction seems to be difficult and probably can be obtained only by diminishing the beam interaction strength, medium length, or exposition time. The noise in LiNbO sub(3) was due to the same mechanism as fanning in BaTiO sub(3), but in LiNbO sub(3), it was produced by running noise gratings instead of stationary ones.