Abstract
Dissipative Kerr soliton (DKS) featuring broadband coherent frequency comb with compact size and low power consumption, provides an unparalleled tool for nonlinear physics investigation and precise measurement applications. However, the complex nonlinear dynamics generally leads to stochastic soliton formation process and makes it highly challenging to manipulate soliton number and temporal distribution in the microcavity. Here, synthesized and reconfigurable soliton crystals (SCs) are demonstrated by constructing a periodic intra-cavity potential field, which allows deterministic SCs synthesis with soliton numbers from 1 to 32 in a monolithic integrated microcavity. The ordered temporal distribution coherently enhanced the soliton crystal comb lines power up to 3 orders of magnitude in comparison to the single-soliton state. The interaction between the traveling potential field and the soliton crystals creates periodic forces on soliton and results in forced soliton oscillation. Our work paves the way to effectively manipulate cavity solitons. The demonstrated synthesized SCs offer reconfigurable temporal and spectral profiles, which provide compelling advantages for practical applications such as photonic radar, satellite communication and radio-frequency filter.
Highlights
Dissipative Kerr soliton (DKS) featuring broadband coherent frequency comb with compact size and low power consumption, provides an unparalleled tool for nonlinear physics investigation and precise measurement applications
Dissipative Kerr solitons (DKSs) are self-organized wave packets in photonic-chip-based microcavities[1,2,3,4,5,6,7], where the chromatic dispersion is balanced by Kerr nonlinear shift, and the cavity dissipation is offset by Kerr parametric gain
As the period and intensity of the potential field can be conveniently tuned by the control light, our method offers full reconfigurable capability to the perfect soliton crystals (PSC) generation
Summary
Dissipative Kerr soliton (DKS) featuring broadband coherent frequency comb with compact size and low power consumption, provides an unparalleled tool for nonlinear physics investigation and precise measurement applications. Synthesized and reconfigurable soliton crystals (SCs) are demonstrated by constructing a periodic intra-cavity potential field, which allows deterministic SCs synthesis with soliton numbers from 1 to 32 in a monolithic integrated microcavity. While preserving many characteristics from the single-soliton state, i.e., smooth spectral envelope and highly ordered temporal soliton distribution, they offer higher comb power per line and flexible soliton repetition rate, which are critical for microcomb applications. We demonstrate synthesized SCs with a given soliton number N from 1 to 32 on demand, equivalent to a reconfigurable soliton generator with a repetition rate ranging from ~49 GHz to ~1.57 THz. the group velocity mismatch between the SC and potential field[40,41] are investigated both theoretically and experimentally, which induces forced oscillation in the power and intracavity position of the synthesized SCs42. The mechanism shown in this work can be extended to other platforms to greatly enhance the flexibility of on-chip SC for practical applications
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