Abstract
A photonic method for microwave signal generation by utilizing the optoelectronic oscillator (OEO) is presented. The OEO is mainly composed of the polarization multiplexed double loops to suppress the side modes, and the phase-shifted fiber Bragg grating (PS-FBG) to select the oscillation frequency. The experimental results show that the generated microwave signal can be tuned from 1 to 4 GHz by changing the wavelength of the light source. By virtue of the polarization multiplexed dual-loop, the suppression ratio of the side mode can be as high as 61 dB. The phase noise with different fiber length in the loop and at different frequency is measured and the results are discussed. The phase noise of −116 dBc/Hz@10 kHz is achieved.
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