Spontaneous solitons in short length geometry of stimulated Raman scattering

Observation of Solitary Waves with Different Phase Behavior in Stimulated Raman Forward Scattering

“…In a series of 420 shots, about 470 solitary pulses were registered. Most of them had small intensities, which is in accordance with previous results [6,7]. Figure 2(b) shows the depleted pump pulse intensity (upper trace) recorded with the first channel and the interference signal (lower trace) resulting from the superposition of the input and output pump pulses and received via channel two.…”

“…They basically result from a phase jump in the Stokes field and manifest themselves as spikes in the depleted pump with a lifetime long compared to the medium dephasing time T 2 but with a duration shorter than or about equal to T 2 . The phase jump can be deterministically generated [3,4], or originates from quantum-noise fluctuations of the Stokes wave and the medium at the beginning of the scattering process [5][6][7]. The phase behavior of the Stokes wave and the mutual phase relations between the pump and Stokes fields and medium polarization have been thoroughly investigated by a number of authors [8][9][10][11][12][13].…”

“…2(a). The number of solitary pulses per shot, the positions where they show up in the depleted pump, and their intensity courses change statistically from shot to shot [7]. In a series of 420 shots, about 470 solitary pulses were registered.…”

Raman Solitons and Mechanical Analog Method

“…Raymer & Walmsley, 1991). Several experimental results (Drauhl et al, 1983) show peaks of the pumping radiation (Raman peaks) emerging spontaneously in pumping depletion zone, see also (Gakhovich et al, 1993). This effect of nonlinear Raman amplification was used then as a tool to observe the macroscopic fluctuations of the phase Stokes initial vacuum (Englund & Bowden, 1986).…”

Raman solitons in transient SRS

“…Here the system possesses a Lax pair [3,7,8] and can be treated by means of the inverse scattering transform (IST) generalized to boundary-value problems [9,10]. The observation of the Raman soliton is an interesting open problem, especially since the boundary-value problem for TSRS has been completely solved on the finite interval in [11] with the essential result that, as expected from the works [12,13,14], the field q(x, t) universally evolves toward the self-similar solution.…”