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arXiv · 2606.29921

Bifurcation structure of soliton self-injection locking in microresonators

S. Deshmukh·T. M. Schneider·A. Tikan
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Abstract

Self-injection locking (SIL) of a diode laser to a high quality-factor microresonator has recently become increasingly important in hybrid integrated photonics, providing access to compact sub-Hz linewidth lasers. It was also shown to facilitate the access to dissipative Kerr solitons - the key to a low-noise coherent frequency comb on a photonic chip. However, the existence and stability ranges of SIL soliton states in experimentally controlled parameters are still not fully understood. Here we study the bifurcation structure of solutions in a model of soliton SIL in the weak-backscattering limit. We show that SIL produces soliton-number-dependent existence ranges of multi-soliton solutions in free-laser detuning and feedback phase parameters. We identify exclusive single-soliton existence regions and demonstrate dynamical access to single solitons in this region by direct numerical simulations using prescribed parameter sweeps.

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S. Deshmukh, T. M. Schneider, A. Tikan. 2026-06-29. Bifurcation structure of soliton self-injection locking in microresonators. https://arxiv.org/abs/2606.29921

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