Abstract
The theoretical model of spatial noise passing through a spatial filter is established in high power laser system under the small signal approximation. The transmission characteristic for a noise signal passing through spatial filters with different magnifications is analyzed by numerical simulation, according to the actual structure of the high power laser system. The results show that the spatial modulation period of low-frequency noise getting through the pinhole will be proportional to the magnification of the spatial filter. When the magnification is less than 1, the safe low-frequency noise will be extruded into the high-frequency region, which is the fast increasing part, and finally develops into the most dangerous part which can damage the optical devices. The conclusion of this research improves the relay imaging theory of a spatial filter and provides an important theoretical basis for a general design of high power laser systems.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Hunt J T, Renard P A, Simmons W W. Improved performance of fusion lasers using the imaging properties of multiple spatial filters. Appl Opt, 1977, 16: 779–782
Hunt J T, Glaze J A, Simmons W W, et al. Suppression of self-focusing through low-pass spatial filtering and relay imaging. Appl Opt, 1978, 17: 2053–2057
Korniski R J, Edward E R, Miller J L. Spatial filter lens design for the main laser of the National Ignition Facility. Proc SPIE, 1998, 3482: 737–747
Potemkin A K, Barmashova T V, Kirsanov A V, et al. Spatial filters for high-peak-power multistage laser amplifiers. Appl Opt, 2007, 46: 4423–4430
You K M, Wen S C. Numerical study on transformation property of high power laser beam propagating through Spatial Filter. J Optoelectron Laser, 2001, 12: 147–150
Zhang B, Lu B D. Propagation of laser beams with amplitude modulations and phase fluctuations through a spatial filter. Chin J lasers, 1997, 24: 903–908
Murray J E, Milam D, Boley C D, et al. Spatial filter pinhole development for the National Ignition Facility. Appl Opt, 2000, 39: 1405–1420
Bespalov V I, Talanov V I. Filamentary structure of light beams in nonlinear liquids. J Exp Theor Phys Lett, 1966, 3: 307–310
Aikens D, Roussel A, Bray M. Derivation of preliminary specifications for transmitted wavefront and surface roughness for large optics used in Inertial Confinement Fusion. Proc SPIE, 1997, 2633: 350–360
Liu H J, Jing F, Zuo Y L, et al. Nonlinear propagation of localized wavefront deformation in high-power laser facility. High Power Laser and Part Beams, 2006, 18: 1850–1854
Simmons W W, Hunt J T, Warren W E. Light propagation through large laser systems. IEEE J Quantum Electron, 1981, 17: 1727–1744
Collins S A. Lens-system diffraction integral written in terms of matrix optics. J Opt Soc Am, 1970, 60: 1168–1177
Lukishova S G, Senatsky Y V, Bykovsky N E, et al. Beam shaping and suppression of self-focusing in high-peak-power Nd: glass laser systems. In: Self-focusing: Past and Present, Topics in Applied Physics. New York: Springer, 2009. 114: 191–229
Fleck J A Jr, Layne C. Study of self-focusing damage in a high-power Nd: Glass-rod amplifier. Appl Phys Lett, 1973, 22: 467–469
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sun, P., Liu, D., Zhang, Y. et al. Evolution of low-frequency noise passing through a spatial filter in a high power laser system. Sci. China Phys. Mech. Astron. 54, 411–415 (2011). https://doi.org/10.1007/s11433-010-4240-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11433-010-4240-6