All-optical Brillouin dynamic grating generation in few-mode optical fiber

We report, for the first time (to our knowledge), generation of Brillouin dynamic gratings (BDGs) in few-mode optical fibers. A moving acoustic grating is generated by stimulated Brillouin scattering using a writing beam in one fiber mode, which is used to reflect a reading beam at a different wavel...

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Bibliographic Details
Published in:Optics letters 2012-11, Vol.37 (22), p.4660-4662
Main Authors: Li, Shenping, Li, Ming-Jun, Vodhanel, Richard S
Format: Article
Language:English
Subjects:
Beams (radiation)
Brillouin zone
Diffraction gratings
Dynamics
Fibers
Gratings (spectra)
Optical fibers
Optical pumping
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Summary:We report, for the first time (to our knowledge), generation of Brillouin dynamic gratings (BDGs) in few-mode optical fibers. A moving acoustic grating is generated by stimulated Brillouin scattering using a writing beam in one fiber mode, which is used to reflect a reading beam at a different wavelength in another fiber mode. With single-end pumping, a BDG with a tunable reflectance of up to 0.1% is demonstrated in a 15 km specially designed two-mode optical fiber.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.37.004660