Broadband Kerr frequency combs and intracavity soliton dynamics influenced by high-order cavity dispersion

Abstract

We numerically investigate the influence of high-order dispersion (HOD) on temporal and spectral characteristics of microresonator-based optical frequency combs. Theoretical analysis based on the moment method associated with numerical simulations are utilized to study the comb evolution dynamics, showing that temporal shifts of steady-state intracavity solitons are induced by high-odd-order dispersion rather than high-even-order dispersion. The role of HOD on comb spectral envelopes is also elucidated through analyzing the intracavity dispersive wave generations. We further demonstrate that the spectral envelope of a broadband optical frequency comb can be engineered by using a cavity dispersion profile with multiple zero dispersion wavelengths.

Existence and switching behavior of bright and dark Kerr solitons in whispering-gallery mode resonators with zero group-velocity dispersion

“…Some of these investigations were focused on the reversibility breaking in the system which is responsible for the soliton drift, while other works analyzed specific solutions such as timevarying solitons [34,41,42,43,44,45,46]. It is important to note that owing to geometrical dispersion, the overall dispersion of a resonator can in some cases be engineered via its shape to yield a dispersion profile closely corresponding to arbitrary configurations [47,48,49,50,51,52].…”

Soliton frequency comb at microwave rates in a high-Q silica microresonator

“…While the initial work on microcombs demonstrated phase-locked states [19,[27][28][29][30], including pulse generation [31], solitons are both phase locked and, being pulses, can be readily broadened spectrally [25]. Moreover, resonator dispersion can be engineered so as to create coherent dispersive waves that broaden the soliton comb spectrum within the resonator [26,32]. Both of these features can simplify the comb self-referencing process.…”

Bandwidth shaping of microresonator-based frequency combs via dispersion engineering

“…Recent studies have investigated the role of third-order dispersion (TOD) and FOD on DW formation [15,17]. Since the dispersion profile has two zero-GVD (ZGVD) points at 1100 and 1646 nm, we observe in Fig.…”

“…In this Letter, we theoretically and experimentally investigate the role of group-velocity dispersion (GVD) and higher-order dispersion on the bandwidth of siliconnitride-based parametric frequency combs. We show that dispersion engineering in the silicon-nitride (Si 3 N 4 ) platform allows for control of the comb bandwidth and power in the comb to adapt to a particular application.We use a theoretical model based on a modified Lugiato-Lefever equation (LLE) to fully simulate the dynamics of comb generation in Si 3 N 4 microring resonators [11][12][13][14][15][16][17][18][19]. The modified LLE describes the propagation of the intracavity field Et; τ in the microring and is written as,…”

“…We use a theoretical model based on a modified Lugiato-Lefever equation (LLE) to fully simulate the dynamics of comb generation in Si 3 N 4 microring resonators [11][12][13][14][15][16][17][18][19]. The modified LLE describes the propagation of the intracavity field Et; τ in the microring and is written as,…”