On the transition to secondary Kerr combs in whispering-gallery mode resonators

Coillet, Aurélien; Qi, Zhen; Balakireva, Irina; Lin, Guoping; Menyuk, Curtis R.; Chembo, Yanne K.

doi:10.1364/ol.44.003078

Cited by 14 publications

(8 citation statements)

References 45 publications

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“…Specific features of these data are directly diagnostic of our system. The comb power increases in a manner 33 consistent with spatiotemporal instabilities of the Turing pattern that arises at the threshold for parametric oscillation 38 . Specifically, combpower noise indicates a chaotic intraresonator waveform.…”

Section: Hybrid Integrated Combs and Accessible Soliton Detuningsmentioning

confidence: 66%

Hybrid InP and SiN integration of an octave-spanning frequency comb

Briles

Chang

et al. 2021

APL Photonics

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Implementing optical-frequency combs with integrated photonics will enable wider use of precision timing signals.Here, we explore the generation of an octave-span, Kerr-microresonator frequency comb, using hybrid integration of an InP distributed-feedback laser and a SiN photonic-integrated circuit. We demonstrate electrically pumped and fiberpackaged prototype systems, enabled by self-injection locking. This direct integration of a laser and a microresonator circuit without previously used intervening elements, like optical modulators and isolators, necessitates understanding self-injection-locking dynamics with octave-span Kerr solitons. In particular, system architectures must adjust to the strong coupling of microresonator back-scattering and laser-microresonator frequency detuning that we uncover here. Our work illustrates critical considerations towards realizing a self-referenced frequency comb with integrated photonics.

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Section: Hybrid Integrated Combs and Accessible Soliton Detuningsmentioning

confidence: 66%

Hybrid InP and SiN integration of an octave-spanning frequency comb

Briles

Chang

et al. 2021

APL Photonics

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“…We characterize the quantum formation dynamics of secondary combs through secondorder photon correlations (Fig. 4), complementing earlier classical studies 36,37 . By monitoring mode µ = +4, which is equidistant from the pump and the primary sideband, we observe simultaneously the degenerate and nondegenerate spontaneous pair generation processes, as well as the merging of the coherent subcombs.…”

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confidence: 63%

Quantum optics of soliton microcombs

Guidry,

Lukin,

Yang

et al. 2021

Preprint

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Soliton microcombs -phase-locked microcavity frequency combs -have become the foundation of several classical technologies in integrated photonics, including spectroscopy, LiDAR, and optical computing. Despite the predicted multimode entanglement across the comb, experimental study of the quantum optics of the soliton microcomb has been elusive. In this work, we use secondorder photon correlations to study the underlying quantum processes of soliton microcombs in an integrated silicon carbide microresonator. We show that a stable temporal lattice of solitons can isolate a multimode below-threshold Gaussian state from any admixture of coherent light, and predict that all-to-all entanglement can be realized for the state. Our work opens a pathway toward a soliton-based multimode quantum resource.

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“…That is no longer true when thermal effects are included. Cnoidal waves with a low periodicity correspond to a periodic stream of solitons, i.e., a soliton crystal [26,[40][41][42][43][44][45][46][47][48][49], so that the stable regions are expected to overlap when thermal effects are not included. However, the intracavity power is approximately proportional to the periodicity, so that when thermal effects are included the detuning of the stable regions decreases as the periodicity decreases.…”

Section: Resultsmentioning

confidence: 99%

“…As the detuning and pump power are increased, the pedestal decreases and the peaks sharpen, so that the cnoidal wave transforms into a periodic train of solitons that is a soliton crystal, as shown in Fig. 2(e) [26,[40][41][42][43][44][45][46][47][48][49]. When thermal effects are taken into account, this deterministic path must be somewhat modified.…”

Section: Resultsmentioning

confidence: 99%

“…In general, our method creates a broadband frequency comb by generating a periodic array of solitons or a perfect soliton crystal rather than a single soliton. Soliton crystals have been the subject of increasing study in the past three years [26,[40][41][42][43][44][45][46][47][48][49] and have advantages over single solitons. First, soliton crystals use the pump N times more efficiently than a single soliton, where N is the number of solitons in the crystal, and the power in the frequency comb increases by a factor N. Second, the number of frequency comb lines is reduced by a factor N, and the power in each comb line is multiplied by a factor N 2 [26].…”

Section: Introductionmentioning

confidence: 99%

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Deterministic access of broadband frequency combs in microresonators using cnoidal waves in the soliton crystal limit

Leshem

D’Aguanno

et al. 2020

Opt. Express

Self Cite

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We present a method to deterministically obtain broad bandwidth frequency combs in microresonators. These broadband frequency combs correspond to cnoidal waves in the limit when they can be considered soliton crystals or single solitons. The method relies on moving adiabatically through the (frequency detuning)×(pump amplitude) parameter space, while avoiding the chaotic regime. We consider in detail Si 3 N 4 microresonators with small or intermediate dimensions and an SiO 2 microresonator with large dimensions, corresponding to prior experimental work. We also discuss the impact of thermal effects on the stable regions for the cnoidal waves. Their principal effect is to increase the detuning for all the stable regions, but they also skew the stable regions, since higher pump power corresponds to higher power and hence increased temperature and detuning. The change in the detuning is smaller for single solitons than it is for soliton crystals. Without temperature effects, the stable regions for single solitons and soliton crystals almost completely overlap. When thermal effects are included, the stable region for single solitons separates from the stable regions for the soliton crystals, explaining in part the effectiveness of backwards-detuning to obtaining single solitons.

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On the transition to secondary Kerr combs in whispering-gallery mode resonators

Cited by 14 publications

References 45 publications

Hybrid InP and SiN integration of an octave-spanning frequency comb

Hybrid InP and SiN integration of an octave-spanning frequency comb

Quantum optics of soliton microcombs

Deterministic access of broadband frequency combs in microresonators using cnoidal waves in the soliton crystal limit

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