Publication: Double Brillouin frequency shift through circulation of odd-order Stokes signal
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Date
2010
Authors
Shee Y.G.
Al-Mansoori M.H.
Ismail A.
Hitam S.
Mahdi M.A.
Journal Title
Journal ISSN
Volume Title
Publisher
OSA - The Optical Society
Abstract
We demonstrate a simple configuration for generating a double Brillouin frequency shift through the circulation of an odd-order Brillouin Stokes signal. It is operated based on cascaded Brillouin scattering in single-mode optical fibers that behave as the Brillouin gain media. A four-port circulator is incorporated into the setup to circulate the odd-order Brillouin Stokes signal in the fiber. It thus initiates a higher order Brillouin Stokes signal, which is double Brillouin frequency downshifted from the input signal. For the 5km long fiber, the Brillouin pump power at 23mW gives a clean output spectrum with 30 dB sideband suppression ratio. The output signal is 0.174nm or ?21.7GHz downshifted from the input signal. � 2010 Optical Society of America.
Description
Keywords
Brillouin scattering , Optical fibers , Brillouin frequency , Brillouin frequency shifts , Brillouin gain , Brillouin pump , Brillouin Stokes , Output spectrum , Sideband suppression ratio , Single-mode optical fiber , Frequency shift keying