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The potential of silicon-based electro-optic modulators for enabling high performance radio-over-fiber applications is demonstrated. Two different applications taking advantage of the linear and nonlinear regime of silicon modulators are investigated. A ring-assisted Mach-Zehnder modulator (MZM) is firstly investigated for RF analog transmission. QPSK and 16-QAM electrical signals are modulated on...
In the following lines it is presented the main needs of the next generation of ADCs for space and defence applications. A review of the state of the art of electronic ADCs will be presented with its main limitations of noise contributions, jitter and limited dynamic range with the frequency. A study of the different architectures of photonic ADCs that could solve the mentioned problems will be carried...
Record wireless signal capacity of up to 40 Gb/s is demonstrated in the 75-110 GHz band. All-optical OFDM and photonic up-conversion are used for generation and digital coherent detection for demodulation.
A photonic structure for microwave filtering with single passband and the capability of continuously tuning the filter response over a broad microwave range is proposed and experimentally demonstrated. The scheme is based on using stimulated Brillouin scattering and single sideband modulation with suppressed carrier (SSB-SC).
We present an optical scheme for frequency up-conversion at the micro-wave and millimeter-wave bands based on semiconductor optical amplifier. The proposed scheme modulates the bias current with an intermediate frequency (IF) in order to achieve intensity modulation of the incoming optical signal modulated with a local oscillator (LO) frequency. After photo-detection products in the form IF+LO are...
The photonic generation, up-conversion and down-conversion of impulse-radio UWB signals employing a Mach-Zehnder modulator and a differential photodiode is proposed. Impulse-radio UWB is generated, up-converted to 24 GHz vehicular radar band in a proof-of-concept experiment.
A highly-scalable photonic quadrature amplitude modulation architecture based on vector summation and dispersive delay lines, which can generate QAM signals directly from parallel digital words is proposed and experimentally demonstrated by generating a 3 Gbps??8QAM??39 GHz modulated carrier.
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