299 research outputs found
Why Patterns Appear Spontaneously in Dissipative Systems?
It is proposed that the spatial (and temporal) patterns spontaneously
appearing in dissipative systems maximize the energy flow through the pattern
forming interface. In other words - the patterns maximize the entropy growth
rate in an extended conservative system (consisting of the pattern forming
interface and the energy bathes). The proposal is supported by examples of the
pattern formation in different systems. No example contradicting the proposal
is known.Comment: 7 pages, 1 figur
Multi-longitudinal-mode micro-laser model
We derive a convenient model for broad aperture micro-lasers, such as microchip lasers, broad area semiconductor lasers, or VCSELs, taking into account several longitudinal mode families. We provide linear stability analysis, and show characteristic spatio-temporal dynamics in such multi-longitudinal mode laser models. Moreover, we derive the coupled mode model in the presence of intracavity refraction index modulation (intracavity photonic crystal). Graphical abstract: [Figure not available: see fulltext.].Peer ReviewedPostprint (published version
Transverse Patterns in Nonlinear Optical Resonators
The book is devoted to the formation and dynamics of localized structures
(vortices, solitons) and extended patterns (stripes, hexagons, tilted waves) in
nonlinear optical resonators such as lasers, optical parametric oscillators,
and photorefractive oscillators. The theoretical analysis is performed by
deriving order parameter equations, and also through numerical integration of
microscopic models of the systems under investigation. Experimental
observations, and possible technological implementations of transverse optical
patterns are also discussed. A comparison with patterns found in other
nonlinear systems, i.e. chemical, biological, and hydrodynamical systems, is
given. This article contains the table of contents and the introductory chapter
of the book.Comment: 37 pages, 14 figures. Table of contents and introductory chapter of
the boo
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