Dynamical Instabilities, Chaos And Spatial Complexity In Fundamental Nonlinear Optical Interactions.
Final rept. 1 Jun 93-31 May 94,
HERIOT-WATT UNIV EDINBURGH (UNITED KINGDOM)
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Experimental and theoretical investigations address nonlinear dynamics and complexity in basic nonlinear optical interactions. Notably contributions include a first demonstration of chaotic dynamics of stimulated Brillouin scattering SBS confirmed through the latest dynamical measurement tools b stochastic effects shown to dominate dynamics for cavityless operation but to be suppressed for SBS with feedback c first generalised treatment of stimulated scattering in which deterministic dynamics and chaos are shown to be inherent features of behaviour consistent with experimental findings d first evidence of patterns, singularities and turbularie in SBS through multi transverse mode interactions e generalised analysis of transverse patterns and instabilities of diffraction-diffusion type systems in nonlinear optics - ongoing f low frequency MHz dynamics and chaos in diode lasers with feedback and in NdYAG modulated lasers - ongoing g control of chaos in diode lasers and development of new all optical control algorithms - ongoing h lasing without inversion in V systems and i new approach to the theory of radiation matter interactions for arbitrary field strength.
- Lasers and Masers