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This paper described the first results demonstrating the Super-Ring tuning concept applied to a 40 microresonator based TTD device, operating with the Balanced SCISSOR scheme. Tunable delay up to 515ps of a 20GHz BW RF photonic signal was shown, using only two drive voltages, with SFDR over 110dB.Hz2/3 for delays up to 300ps.
Commercially packaged optical true-time-delay devices were developed utilizing ultra-low loss silicon nitride microresonators, achieving record tunable delay of 535ps for a 20GHz wide signal, 632ps for a 10GHz wide signal, with tunable loss of 3dB.
Using the Balanced SCISSOR scheme, together with balanced thermal tuning, microresonator based silicon photonics devices were shown to provide a large tunable delay of 345ps, with broad bandwidth and low distortion. These practical devices will find many applications for use in phased array systems.
We demonstrate a tunable-delay of 154ps of a 130GHz bandwidth RF signal using silicon microresonators. To delay such high bandwidth without distortion, we delay an equivalent signal with a much smaller bandwidth (20GHz single sideband) while preserving the original signal's phase.
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