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Recently, pulse-driving of nonlinear microresonators, as opposed to continuous-wave driving (CW), has been demonstrated as a powerful method for overcoming the fundamental inefficiency of single-state dissipative Kerr soliton (DKS) generation[1-2]. While DKS-based frequency combs have made compelling demonstrations in numerous applications, they have been broadly limited in their total conversion efficiency between the large CW pump and the frequency comb lines. The total number of measurable lines generated across a broad bandwidth has also been limited to several hundred, imposing a trade-off between having a large bandwidth and an electronically detectable repetition rate. In this work, an advance in both aspects is demonstrated in a Si3N4 photonic chip-based microresonator, as a direct result of pulse-driving.
© 2019 IEEE
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