Mode-locked ultrashort pulse generation from on-chip normal dispersion microresonators

SW Huang, H Zhou, J Yang, JF McMillan, A Matsko… - Physical review …, 2015 - APS
SW Huang, H Zhou, J Yang, JF McMillan, A Matsko, M Yu, DL Kwong, L Maleki, CW Wong
Physical review letters, 2015APS
We describe generation of stable mode-locked pulse trains from on-chip normal dispersion
microresonators. The excitation of hyperparametric oscillation is facilitated by the local
dispersion disruptions induced by mode interactions. The system is then driven from
hyperparametric oscillation to the mode-locked state with over 200 nm spectral width by
controlled pump power and detuning. With the continuous-wave-driven nonlinearity, the
pulses sit on a pedestal, akin to a cavity soliton. We identify the importance of pump …
We describe generation of stable mode-locked pulse trains from on-chip normal dispersion microresonators. The excitation of hyperparametric oscillation is facilitated by the local dispersion disruptions induced by mode interactions. The system is then driven from hyperparametric oscillation to the mode-locked state with over 200 nm spectral width by controlled pump power and detuning. With the continuous-wave-driven nonlinearity, the pulses sit on a pedestal, akin to a cavity soliton. We identify the importance of pump detuning and wavelength-dependent quality factors in stabilizing and shaping the pulse structure, to achieve a single pulse inside the cavity. We examine the mode-locking dynamics by numerically solving the master equation and provide analytic solutions under appropriate approximations.
American Physical Society
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