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A novel phase-modulation direct-demodulation microwave photonic link for improving the spurious-free dynamic range (SFDR) is proposed and experimentally demonstrated. In the proposed system, two different C-band optical wavelengths are modulated by a phase modulator in opposite directions. After combining the wavelengths, a fiber Bragg grating (FBG) is used to remove the optical spectrum between the...
A coherent MODEM is implemented with FEC payload and checksum distributed between two PM-QPSK optical channels spaced at 200 GHz. Real-time experiments verify PDL and PMD penalties are 40-50% higher without FEC gain sharing.
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