Abstract
In recent experimental studies of instabilities in single-mode lasers, power spectra of the intensity (photocurrent) have often shown period doublings, or doubly periodic behavior, which develop a broadband spectral component as the laser excitation is increased. This has been tentatively identified as the signature of dynamical chaos; but as the power spectrum represents only the Fourier transform of the two-time correlation function, it does not provide a conclusive distinction between dynamical and stochastic noise. Similarly, when the spectral peaks are broader than the instrumental resolution, the cause could be AM modulation by stochastic noise or one of the several types of nearly periodic deterministic chaos.
© 1984 Optical Society of America
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