Impact of desynchronization and drift on soliton-based Kerr frequency combs in the presence of pulsed driving fields

Hendry, Ian; Garbin, Bruno; Murdoch, Stuart G.; Coen, Stéphane; Erkintalo, Miro

doi:10.1103/physreva.100.023829

Cited by 36 publications

(25 citation statements)

References 46 publications

(108 reference statements)

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“…We observe the usual signatures of stable CS formation: a region of modulation instability (MI) is followed by the formation of unstable (breathing) CSs and then a low-noise step indicating the presence of stable CSs. (Note that, throughout our experiments, the precise pump repetition rate is chosen so as to maximise the length of the soliton step, which also ensures that one of the intensity trapping positions is highly favoured due to the presence of stimulated Raman scattering [38].) Thanks to the auxiliary CW laser, the soliton step can be accessed in steady-state simply by manually advancing the cavity detuning.…”

Section: Resultsmentioning

confidence: 99%

“…Theories predict [29], however, that under conditions of perfect synchronisation [with respect to (m/n) FSR], each pump pulse actually possesses two stable trapping points (located on the pulse's leading and trailing edge respectively). Fortunately, this degeneracy can be lifted via appropriate desynchronization of the pump pulse train, forcing the system to favour only one of these two trapping points [38].…”

Section: Conceptmentioning

confidence: 99%

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Harmonic and rational harmonic driving of microresonator soliton frequency combs

Lin

Nielsen

et al. 2020

Preprint

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With demonstrated applications ranging from metrology to telecommunications, soliton microresonator frequency combs have emerged over the past decade as a remarkable new technology. However, standard implementations only allow for the generation of combs whose repetition rate is tied close to the fundamental resonator free-spectral range (FSR), offering little or no dynamic control over the comb line spacing. Here we propose and experimentally demonstrate harmonic and rational harmonic driving as novel techniques that allow for the robust generation of soliton frequency combs with discretely adjustable frequency spacing. By driving an integrated Kerr microresonator with a periodic train of picosecond pulses whose repetition rate is set close to an integer harmonic of the 3.23 GHz cavity FSR, we deterministically generate soliton frequency combs with frequency spacings discretely adjustable between 3.23 GHz and 19.38 GHz. More remarkably, we also demonstrate that driving the resonator at rational fractions of the FSR allows for the generation of combs whose frequency spacing corresponds to an integer harmonic of the pump repetition rate. By measuring the combs' radio-frequency spectrum, we confirm operation in the low-noise soliton regime with no supermode noise. The novel techniques demonstrated in our work provide new degrees of freedom for the design of synchronously pumped soliton frequency combs.

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Section: Resultsmentioning

confidence: 99%

Section: Conceptmentioning

confidence: 99%

Harmonic and rational harmonic driving of microresonator soliton frequency combs

Lin

Nielsen

et al. 2020

Preprint

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“…By changing into a reference frame where the pump is stationary, τ → τ − d × t, the LLE Eq. ( 1) develops a convective drift term (Coen et al 1999;Parra-Rivas et al 2014;Hendry et al 2019):…”

Section: Desynchronization and Locking Rangementioning

confidence: 99%

“…As discussed in (Parra-Rivas et al 2014;Hendry et al 2019), the pump-cavity desynchronization gives rise to a relative drift between the CS and the driving field which is in addition to the motion induced by phase or amplitude inhomogeneities. Therefore, using a PM (S 0 , ∆) = 2, the total CS drift velocity becomes…”

Section: Desynchronization and Locking Rangementioning

confidence: 99%

Phase and Intensity Control of Dissipative Kerr Cavity Solitons

Erkintalo

Murdoch

Coen

2020

Preprint

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Dissipative Kerr cavity solitons are pulses of light that can persist in coherently driven nonlinear optical resonators. They have attracted significant attention over the past decade due to their rich nonlinear dynamics and key role in the generation of coherent microresonator optical frequency combs. Whilst the vast majority of implementations have relied on homogeneous continuous wave driving, the soliton's "plasticity" combined with inhomogeneous driving offers attractive advantages for a host of applications. Here we review recent studies into the dynamics and applications of Kerr cavity solitons in the presence of inhomogeneous driving fields. In particular, we summarise the salient theoretical developments that allow for the analysis of CS motion in the presence of pump phase or amplitude inhomogeneities, and survey recent experiments that use pulsed driving to realise energy efficient and flexible microresonator optical frequency combs.

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“…1(a). Our simulations use the wellknown Lugiato-Lefever equation (LLE) with the desynchronization modelled by means of a convective drift term [21,28,29] and parameters as quoted above. These simulations show the formation of spectrally flat combs with an extent that can be continuously tuned by controlling the cavity desynchronization.…”

mentioning

confidence: 99%

Frequency comb generation in a pulse-pumped normal dispersion Kerr mini-resonator

Sharples

Fatome

et al. 2021

Opt. Lett.

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Kerr microresonators driven in the normal dispersion regime typically require the presence of localized dispersion perturbations, such as those induced by avoided mode crossings, to initiate the formation of optical frequency combs. In this work, we experimentally demonstrate that this requirement can be lifted by driving the resonator with a pulsed pump source. We also show that controlling the desynchronization between the pump repetition rate and the cavity free-spectral range (FSR) provides a simple mechanism to tune the center frequency of the output comb. Using a fiber miniresonator with a radius of only 6 cm we experimentally present spectrally flat combs with a bandwidth of 3 THz whose center frequency can be tuned by more than 2 THz. By driving the cavity at harmonics of its 0.54 GHz FSR, we are able to generate combs with line spacings selectable between 0.54 and 10.8 GHz. The ability to tune both the center frequency and frequency spacing of the output comb highlights the flexibility of this platform. Additionally, we demonstrate that under conditions of large pump-cavity desynchronization, the same cavity also supports a new form of Raman-assisted anomalous dispersion cavity soliton.

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Impact of desynchronization and drift on soliton-based Kerr frequency combs in the presence of pulsed driving fields

Cited by 36 publications

References 46 publications

Harmonic and rational harmonic driving of microresonator soliton frequency combs

Harmonic and rational harmonic driving of microresonator soliton frequency combs

Phase and Intensity Control of Dissipative Kerr Cavity Solitons

Frequency comb generation in a pulse-pumped normal dispersion Kerr mini-resonator

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