抄録
We numerically investigated the antiphase dynamics of spatiotemporal chaos in a broad-area
semiconductor laser. We resolved the partial intensities from the near-field pattern to observe the phase
dynamics. Antiphase periodic oscillation was observed at a low injection current, and spatiotemporal
chaos was observed at a high injection current. We calculated the sum of the partial intensities to
investigate the phase relationship among partial intensities. Inphase dynamics was observed at the low
frequency region including the relaxation oscillation frequency, and antiphase dynamics was observed at
a high frequency region. These numerical results qualitatively agree with our experimental results.
