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A photonic approach to realizing instantaneous measurement of microwave frequency using a pair of fiber Bragg grating (FBG)-based optical differentiators is proposed and experimentally demonstrated. In this approach, a first-order and a second-order FBG-based optical differentiators are used to achieve a linear power ratio function with a uniform measurement resolution and improved system dynamic...
A photonic approach to implementing microwave channelized receiver based on an optical comb is proposed. In this approach, a flat optical comb with 11 comb lines is generated using two cascaded Mach-Zehnder modulators (MZMs). Frequency analysis of an intercepted microwave signal with multiple microwave frequencies is realized by using the optical comb together with a Fabry-Perot (F-P) etalon, a wavelength...
A novel technique for instantaneous microwave frequency measurement using an optical phase modulator is proposed and demonstrated. In the proposed system, a microwave signal with its frequency to be measured is modulated on two optical wavelengths at the phase modulator, with the phase-modulated optical signals sent to a dispersive element, and detected at two photo-detectors. Due to the chromatic...
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