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Radio frequency (RF) photonic link under phase or polarization modulation and coherent in-phase/quadrature (I/Q) demodulation (ΦM/IQ or PolM/IQ) has been reported with unprecedented dynamic range performance, benefiting from the ultrahigh linear transfer function of electro-optic phase modulator. But the ideal linear demodulation cannot be preserved during traditional down-conversion, which is a must...
Stable bias control of lithium niobate Mach-Zehnder modulator (MZM) is crucial for radio-over-fiber (ROF) links, since the bias drift causes deviation from the optimum operating point. In this paper, we propose and experimentally demonstrate a novel dither-free low-bias control technique, especially for deeply modulated, low-biased analog photonic links. In our scheme, a second lightwave passes through...
Wideband photonic links suffer not only from the traditional intermodulation distortions (IMD) but also from the cross modulation distortions (XMD) caused by the out-of-band signals, which severely limit the dynamic range of the links. In this paper, we propose and experimentally demonstrate a novel scheme to effectively suppress the cross modulation distortion in the wideband analog photonic link...
In this paper, we propose and experimentally demonstrate a novel dither-free low bias stabilization method with circulators-assisted in deeply-modulated analog photonic links. The stabilization is achieved by reversely transmitting and power locking a lightwave along the Mach-Zehnder modulator (MZM). Using this technique, bias locking at a low bias position with less than ±0.3 degree phase deviations...
We propose and experimentally demonstrate a linearization approach for a novel type of intensity-modulated directly-detected (IM-DD) analog photonic link based on digital processing technique. In our scheme, the analog signal is intensity and orthogonally modulated on a pair of co-propagated photonic links, i.e. one of the two intensity modulations has a bias angle which is 90 degree difference from...
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