Stimulated Brillouin scattering in a field of opposite light waves

Bespalov, V I; Bubis, E. L.; Kulagina, S. N.; Manishin, V. G.; Matveev, A. Z.; Pasmanik, G. A.; Razenshtein, P. S.; Shilov, A. A.

doi:10.1070/qe1982v012n12abeh006278

Cited by 13 publications

(2 citation statements)

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“…In addition, experimental and theoretical studies have been reported for the case of counterpropagating waves of different frequencies. 9 Instabilities of counterpropagating waves have been shown1 0 to be related to the large reflectivities that are achievable with Brillouin-enhanced four-wave mixing." Here we present experimental confirmation of many of these predictions.…”

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confidence: 99%

Observation of instabilities of laser beams counterpropagating through a Brillouin medium

et al. 1989

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We show experimentally that counterpropagating laser beams in a Brillouin-active medium are unstable to the growth of intensity fluctuations. The intensities of the transmitted beams are found to oscillate at the Brillouin frequency of the medium, which is equal to 7.7 GHz for our experimental conditions of excitation of carbon disulfide at a wavelength of 532 nm. The depth of modulation is found to be as large as 25%. The threshold for this instability depends on the ratio of the intensities of the counterpropagating beams. The threshold is lowest for the case of equal input intensities and is found to be as much as 33% lower than the threshold for single-beam stimulated Brillouin scattering.

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confidence: 99%

Observation of instabilities of laser beams counterpropagating through a Brillouin medium

et al. 1989

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“…The SBS analysis is carried out mainly in the inexhaustible pumping approximation, i.e. in the constant field approximation (CFA) or by numerical calculation of shortened equations [13][14][15]. However, already in the first experiments on SBS, a significant depletion of the pumping of [8,16] was observed.…”

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Phase effects at stimulated Brillouin scattering

Kasumova

Керимли

Safarova

2023

Optics and Spectroscopy

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In the study of stimulated Brillouin scattering (SBS) in the constant intensity approximation, the spatial behavior of the intensity of the Stokes scattering wave in a medium was investigated. It was found that as a result of nonlinear interaction of waves, the period of spatial beats changes. The intensity of the Stokes scattering component is considered as a function of the phase mismatch, pump and acoustic wave intensities. It is found that the efficiency of the scattering of the backward Stokes wave is affected by the total length of the nonlinear medium. According to the analytical expressions obtained in this work, the choice of the optimal parameters of the problem makes it possible to implement the regime of efficient generation of the Stokes scattering component in SBS. The process of generation and amplification of the Stokes scattering component is compared with experiment. By varying the pump intensity, one can control and manipulate the intensity of the output radiation of the Stokes component. Keywords: SBS, backward Stokes scattering wave, constant intensity approximation.

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Factors affecting the beam quality in nearly degenerate four wave mixing

Scott

1987

Optics Communications

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Stimulated Brillouin scattering in a field of opposite light waves

Cited by 13 publications

References 1 publication

Observation of instabilities of laser beams counterpropagating through a Brillouin medium

Observation of instabilities of laser beams counterpropagating through a Brillouin medium

Phase effects at stimulated Brillouin scattering

Factors affecting the beam quality in nearly degenerate four wave mixing

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