FIG. 1. Schematic diagram of the proposed OEO structure.
FIG. 2. The single-loop transfer process of the OEO.
FIG. 3. Measured transmission frequency response of the tunable FBG used in the experiments.
FIG. 4. Spectra of the optical signals generated by the OEO, for different central frequencies of the FBG.
FIG. 5. Measured spectrum of (a) the rf oscillation signal and (b) the phase noise of the generated 10.2-GHz microwave signal.
FIG. 6. Spectra of the generated signal when the frequency was tuned from 6 to 12 GHz.
TABLE 1. The signal amplitude of every sideband and the corresponding filter gain
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