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A simple spurious-free microwave photonic filters (MPF) employing the optical frequency comb (OFC) with quadratic phase, which can be freely tuned without the rigid constraint of the Nyquist zone, is proposed and demonstrated.
We put forward a 2N-bit bipolar photonic digital-to-analog converter (PDAC) scheme based on multi-wavelength optical DQPSK modulation in combination with balanced detection and demonstrate it in a 2.5GS/s 4-bit PDAC experiment.
We propose a novel noise-suppression scheme in spectrum-sliced WDM-PONs. Experimentally, low-noise windows can be created in which the noise is reduced by more than 20dB and the performance of vector signal transmission is significantly improved.
We propose theoretically and experimentally demonstrate a radio-over-fiber link employing optical multi-sidebands modulation to transmit vector signals, with the advantages of overcoming dispersion-induced fading effect and system simplification.
The impact of optical power imbalance among all channels on optical beamforming networks is analyzed and an improvement scheme is presented. Both experiment and simulation results prove the power imbalance seriously impairs the system functions and a suitable power-balanced element can improve the whole system performance remarkably.
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