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Spontaneous pattern formation in a cavity with incoherent light

Tal Carmon, Hrvoje Buljan, and Mordechai Segev

Open Access Open Access

Abstract

We present the first experimental observation of spontaneous pattern formation in a nonlinear optical cavity in which the circulating light is both spatially and temporally incoherent.

©2004 Optical Society of America

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Supplementary Material (1)

Media 1: MOV (2499 KB)     

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Figures (3)
Fig. 1.
Fig. 1. The experimental setup.

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Fig. 2.
Fig. 2. (Movie 2.5 MB) Top row: Intensity patterns at the output of the crystal, with and without feedback; the strength of the nonlinearity is increased from left to right. Plot: Modulation depth of the emerging pattern as a function of nonlinearity for different values of feedback.

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Fig. 3.
Fig. 3. Upper picture: Characteristic (time-averaged) intensity pattern. Lower picture: The highly speckled structure of the instantaneous intensity of the incoherent beam obtained by stopping the rotating diffuser, and capturing the speckled pattern. The average size of the speckles, which corresponds to the spatial correlation distance, is several times smaller than the pattern periodicity

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