Double Brillouin frequency shift through circulation of odd-order Stokes signal

作者：Shee Yu Gang; Al Mansoori Mohammed Hayder; Ismail Alyani; Hitam Salasiah; Mahdi Mohd Adzir^*

来源：Applied Optics, 2010, 49(20): 3956-3959.

DOI：10.1364/AO.49.003956

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 23 mW gives a clean output spectrum with 30 dB sideband suppression ratio. The output signal is 0.174 nm or similar to 21.7 GHz downshifted from the input signal.

• 出版日期2010-7-10