Optical pattern formation far beyond threshold

Thorston Ackemann; E. Grosse Westhoff; M. Pesch; D. Rudolph; Wulfhard K. Lange

doi:10.1117/12.475935

24 July 2002 Optical pattern formation far beyond threshold

Thorston Ackemann, E. Grosse Westhoff, M. Pesch, D. Rudolph, Wulfhard K. Lange

Author Affiliations +

Proceedings Volume 4751, ICONO 2001: Nonlinear Optical Phenomena and Nonlinear Dynamics of Optical Systems; (2002) https://doi.org/10.1117/12.475935
Event: XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), 2001, Minsk, Belarus

Abstract

Optical pattern formation is studied far beyond threshold in a single-mirror feedback scheme using sodium vapor as the nonlinear medium. Patterns with twelve fundamental wave vectors arise form hexagons in a secondary bifurcation. Besides irregular patterns, quasi patterns and superlattices are obtained. Even after a tertiary bifurcation the patterns remain stationary. Fourier filtering experiments show that the harmonics of the fundamental wave vectors are essential for the stability of the secondary and tertiary patterns. A novel Fourier filtering technique is used for a measurement of the neutral stability curve and proves experimentally the existence of multiple instability regions existing due to the periodicity of the Talbot effect.

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Thorston Ackemann, E. Grosse Westhoff, M. Pesch, D. Rudolph, and Wulfhard K. Lange "Optical pattern formation far beyond threshold", Proc. SPIE 4751, ICONO 2001: Nonlinear Optical Phenomena and Nonlinear Dynamics of Optical Systems, (24 July 2002); https://doi.org/10.1117/12.475935

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