Towards visible soliton microcomb generation

Lee, Jun Young; Oh, Dong Yoon; Yang, Qi‐Fan; Shen, Boqiang; Wang, Heming; Yang, Ki Youl; Lai, Yi Hsuan; Li, Xinbai; Vahala, Kerry J.

doi:10.1038/s41467-017-01473-9

Cited by 101 publications

(50 citation statements)

References 61 publications

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“…From a broader perspective, our work gives strong evidence of the technological readiness of the Si 3 N 4 platform for soliton-based operation in the NIR domain around 1 μm, including comparably good quality factors and the means of dispersion engineering, which makes it a highly promising candidate for multiple biological and other applications in this spectral window, including OCT and dual-comb CARS. Finally, we would like to draw the reader’s attention to the other work on the generation of DKS states centred at 1064 and 780 nm in fibre-coupled silica microdiscs[ 59 ].…”

Section: Discussionmentioning

confidence: 99%

Photonic chip-based soliton frequency combs covering the biological imaging window

et al. 2018

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Dissipative Kerr solitons (DKS) in optical microresonators provide a highly miniaturised, chip-integrated frequency comb source with unprecedentedly high repetition rates and spectral bandwidth. To date, such frequency comb sources have been successfully applied in the optical telecommunication band for dual-comb spectroscopy, coherent telecommunications, counting of optical frequencies and distance measurements. Yet, the range of applications could be significantly extended by operating in the near-infrared spectral domain, which is a prerequisite for biomedical and Raman imaging applications, and hosts commonly used optical atomic transitions. Here we show the operation of photonic-chip-based soliton Kerr combs driven with 1 micron laser light. By engineering the dispersion properties of a Si3N4 microring resonator, octave-spanning soliton Kerr combs extending to 776 nm are attained, thereby covering the optical biological imaging window. Moreover, we show that soliton states can be generated in normal group–velocity dispersion regions when exploiting mode hybridisation with other mode families.

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Section: Discussionmentioning

confidence: 99%

Photonic chip-based soliton frequency combs covering the biological imaging window

et al. 2018

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“…Such chip-level integratable microcavities with a high quality factor enable efficient nonlinear optical processes like cascaded four-wave mixing (FWM), which can lead to broadband frequency-comb generation from a continuous-wave laser. Kerr frequency combs have been observed in many platforms like MgF 2 resonators [5,6], diamond [7], silica disks [8,9], aluminum nitride [10,11], silicon nitride [12][13][14], and silicon [15,16], since it was first demonstrated in silica microtoroids [17]. Generally, frequency combs are generated in the anomalous dispersion region in these materials, which can be achieved by elaborate waveguide cross-section engineering.…”

Section: Introductionmentioning

confidence: 99%

Influences of multiphoton absorption and free-carrier effects on frequency-comb generation in normal dispersion silicon microresonators

et al. 2018

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We investigate frequency-comb generation in normal dispersion silicon microresonators from the near-infrared to mid-infrared wavelength range in the presence of multiphoton absorption and free-carrier effects. It is found that parametric oscillation is inhibited in the telecom wavelength range resulting from strong two-photon absorption. On the contrary, beyond the wavelength of 2200 nm, where three-and four-photon absorption are less detrimental, a comb can be generated with moderate pump power, or free-carriers are swept out by a positive-intrinsic-negative structure. In the temporal domain, the generated combs correspond to flat-top pulses, and the pulse duration can be easily controlled by varying the laser detuning. The reported comb generation process shows a high conversion efficiency compared with anomalous dispersion regime, which can guide and promote comb formation in materials with normal dispersion. As the comb spectra cover the mid-infrared wavelength range, they can find applications in comb-based radiofrequency photonic filters and mid-infrared spectroscopy.

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“…Although Kerr combs have been known for more than one decade (7) [and have been reviewed in (6,(26)(27)(28)], the discovery of the DKS regime (9) has unlocked their full potential by providing a route to broadband and fully coherent microresonator-based frequency combs, overcoming earlier challenges of low coherence (29)(30)(31). Such soliton-based microcombs in chip-integrated microresonators have achieved low-power, octave-spanning frequency combs in various spectral windows that now encompass the near-infrared (32,33), telecommunication (34,35), and mid-infrared spectral window (18,36), with repetition rates from only a few gigahertz (37) to terahertz. The observation of DKS in microresonators yields a merging of soliton physics and high-precision frequency comb applications, stimulating a renaissance in dissipative soliton research and enabling many technological applications.…”

mentioning

confidence: 99%

Dissipative Kerr solitons in optical microresonators

Kippenberg

Gaeta

Lipson

et al. 2018

Science

1,454

792

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The development of compact, chip-scale optical frequency comb sources (microcombs) based on parametric frequency conversion in microresonators has seen applications in terabit optical coherent communications, atomic clocks, ultrafast distance measurements, dual-comb spectroscopy, and the calibration of astophysical spectrometers and have enabled the creation of photonic-chip integrated frequency synthesizers. Underlying these recent advances has been the observation of temporal dissipative Kerr solitons in microresonators, which represent self-enforcing, stationary, and localized solutions of a damped, driven, and detuned nonlinear Schrödinger equation, which was first introduced to describe spatial self-organization phenomena. The generation of dissipative Kerr solitons provide a mechanism by which coherent optical combs with bandwidth exceeding one octave can be synthesized and have given rise to a host of phenomena, such as the Stokes soliton, soliton crystals, soliton switching, or dispersive waves. Soliton microcombs are compact, are compatible with wafer-scale processing, operate at low power, can operate with gigahertz to terahertz line spacing, and can enable the implementation of frequency combs in remote and mobile environments outside the laboratory environment, on Earth, airborne, or in outer space.

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Towards visible soliton microcomb generation

Cited by 101 publications

References 61 publications

Photonic chip-based soliton frequency combs covering the biological imaging window

Photonic chip-based soliton frequency combs covering the biological imaging window

Influences of multiphoton absorption and free-carrier effects on frequency-comb generation in normal dispersion silicon microresonators

Dissipative Kerr solitons in optical microresonators

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