Transverse instabilities and pattern formation in two-beam-excited nonlinear optical interactions in liquids.
نویسندگان
چکیده
We describe observations of various transverse instabilities that occur when two laser beams intersect in nonlinear optical liquids. Patterns that we observe include two types of conical emission and the generation of a linear array of spots. These results can be understood in terms of the physical processes of self-diffraction, two-beam-excited conical emission, and seeded modulational instability.
منابع مشابه
Resonant two-dimensional patterns in optical cavities with a rotated beam
We describe selection and dynamics of transverse patterns in a nonlinear feedback cavity with a rotated beam. The symmetry of the patterns, described by composite modes, is determined by the image rotation angle within the loop. Complex quasicrystalline patterns sustained by resonant interactions arise under conditions when wave and Turing composite modes are excited simultaneously. It is shown...
متن کاملIdentification of Nonlinear Modal Interactions in a Beam-Mass-Spring-Damper System based on Mono-Frequency Vibration Response
In this paper, nonlinear modal interactions caused by one-to-three internal resonance in a beam-mass-spring-damper system are investigated based on nonlinear system identification. For this purpose, the equations governing the transverse vibrations of the beam and mass are analyzed via the multiple scale method and the vibration response of the system under primary resonance is extracted. Then,...
متن کاملTransverse pattern formation and its control in photorefractive optics
A wealth of periodic transverse patterns is observed in nonlinear optical, photorefractive single-feedback systems. It is the extension of a photorefractive medium in the direction of propagation of the laser beam that allows for the formation of stable hexagons, squares, rhombuses and dodecagons above the first bifurcation of the system. In this article we review the formation of these periodi...
متن کاملTransverse optical patterns for ultra-low-light-level all-optical switching
We review recent theoretical and experimental efforts toward developing an all-optical switch based on transverse optical patterns. Transverse optical patterns are formed when counterpropagating laser beams interact with a nonlinear medium. A perturbation, in the form of a weak switch beam injected into the nonlinear medium, controls the orientation of the generated patterns. Each state of the ...
متن کاملThe Liquid Crystal Light Valve with Optical Feedback: a Case Study in Pattern Formation
Pattern formation in different systems has attracted a growing attention in these last years. In the field of optics, transverse profiles of propagating beams have been investigated since the first studies on interference and diffraction. This initial interest was raised to a new level by the growing importance of nonlinear effects that could be observed with high intensity beams, typically las...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 31 7 شماره
صفحات -
تاریخ انتشار 2006