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RF photonic techniques can be used to extend operating frequencies and bandwidth of mission communications and sensing systems. Photonic links inherently cover wide frequency bandwidths and optical modulators and detectors have been demonstrated that operate up to 100 GHz. This paper presents a photonic method for tunable high frequency carrier generation and wideband tunable RF frequency conversion...
We present a reconfigurable optical discriminator filter for frequency modulated microwave-photonics link applications. The filter is based on a simplified ring-assisted Mach–Zehnder interferometer configuration. It enables conversion of a highly linear frequency to amplitude modulation. Operations in a fixed bandwidth (BW) of 30 GHz and a tunable bandwidth from 10 to 30 GHz are achieved using third-...
We present a photonic method for tunable high frequency carrier generation and wideband tunable RF frequency down-conversion with low phase noise. The phase noise of the photonic generated RF/IF signal is limited by the RF signal generator used to synthesize the optical local oscillators. We show phase noise measurements of photonic frequency synthesized carriers at 24 GHz and down-conversion measurements...
A photonic frequency converter based on optical sideband filtering can be used to produce up- and down-converted signals over a wide range of RF frequencies. The reduction of mixing spurs provides an important advantage over conventional RF mixers for wide-band operation. We demonstrate down-conversion from 5 – 20 GHz to a 100 MHz IF with positive gain and high linearity, and direct digitization of...
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