The excitation of stimulated scattering of laser radiation at several equidistant frequencies is observed in an aqueous suspension of hollow glass microspheres. The scattering spectrum is frequency-asymmetric. No stimulated Brillouin scattering, accompanying nonlinear processes in condensed media excited by narrowband laser pulses on the order of tens of nanoseconds, is detected. The observed features are interpreted in terms of stimulated scattering mediated by the whispering-gallery modes of glass microspheres.
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ACKNOWLEDGMENTS
We are grateful to A.M. Yurkin, director of OOO Kristally Sibiri, for his help with creating the experimental setup. Microphotographs of the glass microspheres were obtained with a Carl Zeiss optical microscope at the Shared-Access Center, Prokhorov General Physics Institute, Russian Academy of Sciences.
Funding
This study was supported by the Russian Science Foundation, project no. 22-22-00153.
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Translated by M. Skorikov
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Bunkin, A.F., Davydov, M.A., Fedorov, A.N. et al. Stimulated Scattering of Laser Radiation in an Aqueous Suspension of Glass Microspheres. Jetp Lett. 116, 619–622 (2022). https://doi.org/10.1134/S0021364022602081
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DOI: https://doi.org/10.1134/S0021364022602081