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Modulation instability of the stimulated Brillouin scattering in fibers in a presence of acoustic diffraction

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An influence of acoustic wave diffraction on the modulation instability of the backward stimulated Brillouin scattering in fibers is numerically investigated, when a small feedback for the Stokes wave is present. The cases of acoustic waveguide and anti-waveguide fibers are considered. It is shown that a presence of acoustic diffraction may expand the region of occurrence of modulation instability and may lead to 2–5 times increasing the peak amplitude of output Stokes pulses. In this case, a stable train of short powerful Stokes pulses of nanosecond duration is produced at the output.

Document Type: Research Article


Affiliations: 1: National Institute for Astrophysics, Optics, and Electronics, Puebla 72000, Pue., Mexico 2: Autonomous State University of Morelos, CIICAp, Cuernavaca 62210, Mor., Mexico

Publication date: 2003-06-01

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