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A novel approach to generate tunable microwave photonic pulse shaping based on modified incoherent frequency-to-time mapping (FTTM) is proposed. By adjusting the product of the bit-rate and the pulsewidth (i.e. BΔT) to introduce the intersymbol interference, we demonstrate the effectiveness of our approach by generating typical UWB and triangular pulses.
Multiform spectral shaping schemes to provide tunability on the shape, free spectral range and bandwidth of microwave photonic signals are reviewed. By utilizing specific dispersion-based conversion techniques, the proposed scheme scan be widely used to achieve flexible manipulation of microwave signals.
We demonstrate a 10 GHz photonic oscillator based on optical frequency division of a high-stability optical reference with a modelocked fs laser. Characterization with a second independent photonic oscillator reveals a close-to-carrier phase noise that is < 100 dBc/Hz, reducing to a shot noise floor of −156 dBc/Hz at a 1MHz offset.
We report on the generation of >50 nm of a 12.5 GHz-spaced frequency comb in the 1550 nm band, achieved by optically filtering a 250 MHz self-referenced frequency comb. Pulse compression yields 150 fs pulses.
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