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Subharmonic Entrainment of Kerr Breather Solitons



Daniel Cole, Scott Papp


We predict subharmonic entrainment of breather-soliton oscillations to a periodic perturbation at the round-trip time TR in Kerr-nonlinear optical resonators; an integer ratio Tb=TR ¼ N ≫ 1 results for breathing period Tb. Rigid entrainment is observed with intermediate finesse (F ∼ 30–40) for N up to 20, and we propose a way to realize higher entrainment ratios at higher finesse. This nontrivial synchronization across the widely separated timescales of the photon lifetime and round-trip time points to a new direction for research in this field and may find application, for example, in the measurement of a pulse train repetition rate that is electronically inaccessible.
Physical Review Letters


Microresonator frequency combs, synchronization, subharmonic entrainment


Cole, D. and Papp, S. (2019), Subharmonic Entrainment of Kerr Breather Solitons, Physical Review Letters, [online], (Accessed June 17, 2024)


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Created October 25, 2019, Updated June 6, 2024