Fig. 9: Dark pulses in a normal-dispersion microresonator.
From: Advances in resonator-based Kerr frequency combs with high conversion efficiencies
a Measured integrated dispersion with respect to the resonance around 1537.4 nm. Red circles, cold cavity; blue crosses, pumped cavity with pump power of ~1 W. b Power transmission traces when pump swept across a resonance. 20 measured traces are overlapped with different colors to show reproducibility. c, d Optical spectra and radio-frequency spectra (blue lines, red lines indicate the noise floor) for each stage marked in (b). e Measured (top) and simulated (bottom) cross-correlation for the comb shown in (c), III. Images are adapted with permission from ref. 39. Copyright 2015 Springer Nature Limited.
