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Si3N4-chip-based versatile photonic RF waveform generator with a wide tuning range of repetition rate

Abstract

In this Letter, we demonstrate a ${{\rm Si}_3}{{\rm N}_4}$-chip-based photonic approach to generate versatile radio frequency (RF) waveforms with a large tuning range of repetition rates. The amplitude and phase of the RF-phase-modulated signal are spectrally manipulated to synthesize Fourier coefficients of the desired RF waveforms by controlling the resonance conditions and frequencies of ${{\rm Si}_3}{{\rm N}_4}$ optical ring resonators. Full-duty-cycle triangular, square, and sawtooth waveforms with widely tunable repetition rates from 1 to 13 GHz were experimentally generated.

© 2020 Optical Society of America

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