Side-stepping traditional laser local oscillator down-conversion techniques, Australian engineers are using acoustic interactions to retrieve frequency and phase information from Gbit/s modulated optical signals. “Our technique uses the interaction of photons and acoustic waves to enable an increase in signal capacity and therefore speed,” said Dr Elias Giacoumidis of the University of Sidney. “This allows ...
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from Electronics Weekly https://www.electronicsweekly.com/news/research-news/optical-demodulator-shuns-local-oscillator-without-loosing-narrowband-finesse-2018-09/
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