Optical pattern formation far beyond threshold

T. Ackemann; E. Große Westhoff; M. Pesch; D. Rudolph; W. Lange

doi:10.1117/12.475935

Optical pattern formation far beyond threshold

T. Ackemann, E. Große Westhoff, M. Pesch, D. Rudolph, W. Lange

Physics

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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 from hexagons in a secondary bifurcation. Besides irregular patterns, quasipatterns 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.

Original language	English
Pages (from-to)	370-381
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4751
DOIs	https://doi.org/10.1117/12.475935
Publication status	Published - 24 Jul 2002

Keywords

fourier filtering
optical pattern formation
quasipatterns
secondary instabilities
superlattices

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AU - Ackemann, T.

AU - Westhoff, E. Große

AU - Pesch, M.

AU - Rudolph, D.

AU - Lange, W.

PY - 2002/7/24

Y1 - 2002/7/24

N2 - 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 from hexagons in a secondary bifurcation. Besides irregular patterns, quasipatterns 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.

AB - 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 from hexagons in a secondary bifurcation. Besides irregular patterns, quasipatterns 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.

KW - fourier filtering

KW - optical pattern formation

KW - quasipatterns

KW - secondary instabilities

KW - superlattices

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JF - Proceedings of SPIE - The International Society for Optical Engineering

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Optical pattern formation far beyond threshold

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Keywords

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