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

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.

Citation Download Citation

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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