Double Brillouin frequency shift through circulation of odd-order Stokes signal
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Optical Society of America
2010
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| Online Access: | http://psasir.upm.edu.my/id/eprint/14134/ http://psasir.upm.edu.my/id/eprint/14134/1/Double%20Brillouin%20frequency%20shift%20through%20circulation%20of%20odd-order%20Stokes%20signal.pdf |
| Summary: | 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 5 km long fiber, the Brillouin pump power at 23 mW gives a clean output spectrum with 30 dB sideband suppression ratio. The output signal is 0.174 nm or ∼21.7 GHz downshifted from the input signal. |
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