Experimental confirmation of nonequilibrium steady-state theory: Brillouin scattering in a temperature gradient

1984 ◽  
Vol 30 (7) ◽  
pp. 4017-4020 ◽  
Author(s):  
H. Kiefte ◽  
M. J. Clouter ◽  
R. Penney
Keyword(s):  
Steady State ◽  
Temperature Gradient ◽  
Brillouin Scattering ◽  
State Theory ◽  
Nonequilibrium Steady State ◽  
Experimental Confirmation

Transient analysis for stimulated thermal scattering

1969 ◽  
Vol 47 (20) ◽  
pp. 2265-2268 ◽  
Author(s):  
R. H. Enns ◽  
I. P. Batra
Keyword(s):  
Steady State ◽  
Transient Analysis ◽  
Brillouin Scattering ◽  
Unit Length ◽  
State Theory ◽  
Nonlinear Gain ◽  
Thermal Scattering

In previous treatments, the nonlinear gain per unit length for stimulated thermal scattering has been calculated using a steady-state approach without examining the conditions under which such an approach is valid. Here we present a transient analysis and calculate the time which must elapse before the steady-state theory becomes applicable. We show that in both stimulated thermal Rayleigh and stimulated thermal Brillouin scattering it is the so-called Rayleigh lifetime τR which determines the onset of steady state.

Non-steady-state stimulated scattering: a convenient solution in terms of convolution integrals

1977 ◽  
Vol 352 (1671) ◽  
pp. 539-555
Keyword(s):  
Steady State ◽  
Input Pulse ◽  
State Theory ◽  
Spatial Modulation ◽  
Bragg Angle ◽  
Stimulated Scattering ◽  
Scattering Spectrum ◽  
Convolution Integrals ◽  
Beam Incident ◽  
Scattered Beam

A non-steady-state theory of stimulated light scattering, which places particular emphasis on the effects induced in the scattering medium, is developed. It is shown that a spatial modulation of the dielectric constant is induced whose amplitude and phase can be expressed in terms of simple convolution integrals. These involve only the input pulse shape, the steady-state scattering spectrum and the frequency shift between the laser and scattered beams. The effect of the induced modulation on the scattered beam and on any weak independent beam incident at the Bragg angle is also considered.

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