Dirac solitons in optical microresonators

Wang, Heming; Lu, Yukun; Wu, Lue; Oh, Dong Yoon; Lee, Jun Young; Vahala, Kerry J.

doi:10.1038/s41377-020-00438-w

Cited by 27 publications

(9 citation statements)

References 73 publications

(95 reference statements)

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“…1a. This peculiar effect is also associated with Dirac solitons [16] and it is shown that the 2-ring pulse pair represents a new embodiment of a Dirac soliton as the underlying dynamical equation (see Methods) resembles the nonlinear Dirac equation in 1 + 1 dimensions. Pulse pairing is also extendable to higher-dimensional designs with additional normal dispersion rings.…”

Section: Introductionmentioning

confidence: 85%

Soliton pulse pairs at multiple colors in normal dispersion microresonators

Yuan¹,

Gao²,

Wang³

et al. 2023

Preprint

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Soliton microcombs [1] are helping to advance the miniaturization of a range of comb systems [2]. These combs mode lock through the formation of short temporal pulses in anomalous dispersion resonators. Here, a new microcomb is demonstrated that mode locks through the formation of pulse pairs in normal-dispersion coupled-ring resonators. Unlike conventional microcombs, pulses in this system cannot exist alone, and instead must phase lock in pairs to form a bright soliton comb. Also, the pulses can form at recurring spectral windows and the pulses in each pair feature different optical spectra. This pairwise mode-locking modality extends to higher dimensions and we demonstrate 3-ring systems in which 3 pulses mode lock through alternating pairwise pulse coupling. The results are demonstrated using the new CMOS-foundry platform that has not previously produced bright solitons on account of its inherent normal dispersion [3]. The ability to generate multi-color pulse pairs over multiple rings is an important new feature for microcombs. It can extend the concept of all-optical soliton buffers and memories [4,5] to multiple storage rings that multiplex pulses with respect to soliton color and that are spatially addressable. The results also suggest a new platform for the study of quantum combs [6-8] and topological photonics [9][10][11].

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Section: Introductionmentioning

confidence: 85%

Soliton pulse pairs at multiple colors in normal dispersion microresonators

Yuan¹,

Gao²,

Wang³

et al. 2023

Preprint

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“…Dirac solitons are generated by engineering dispersion induced by nonlinear modecoupling in the visible band [166]. They normally have asymmetric soliton comb spectra due to different mode compositions on the different sides of the spectra.…”

Section: Soliton Classesmentioning

confidence: 99%

Applications for optical frequency microcomb chips

Moss¹

2023

Preprint

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<p>Optical microcombs represent a new paradigm for generating laser frequency combs based on compact chip-scale devices, which have underpinned many modern technological advances for both fundamental science and industrial applications. Along with the surge in activity related to optical micro-combs in the past decade, their applications have also experienced rapid progress ‒ not only in traditional fields such as frequency synthesis, signal processing, and optical communications, but also in new interdisciplinary fields spanning the frontiers of light detection and ranging (LiDAR), astronomical detection, neuromorphic computing, and quantum optics. This paper reviews the applications of optical microcombs. First, an overview of the devices and methods for generating optical microcombs is provided, which are categorized into material platforms, device architectures, soliton classes, and driving mechanisms. Second, the broad applications of optical microcombs are systematically reviewed, which are categorized into microwave photonics, optical communications, precision measurements, neuromorphic computing, and quantum optics. Finally, the current challenges and future perspectives are discussed.</p>

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“…This localized dispersion perturbation can lead to a local anomalous dispersion which can meet a phase-matching condition for the four wave mixing (FWM) process. At visible or near visible wavelengths, optical frequency combs have been generated via AMXs in a crystalline WGM resonator [30], a microring resonator [32][33][34], dual microring resonators [35,36], and a wedge disk resonator [37][38][39]. Chip-based ring resonators can be designed to introduce AMXs at desired locations using a thermal heater [40] or by adding an another resonator nearby [35,36,41].…”

Section: Dispersion Engineering and Avoided Mode Crossingsmentioning

confidence: 99%

Optical Frequency Combs in Aqueous and Air Environments at Visible to Near-IR Wavelengths

Choi,

Gin,

2022

Preprint

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The ability to detect and identify molecules at high sensitivity without the use of labels or capture agents is important for medical diagnostics, threat identification, environmental monitoring, and basic science. Microtoroid optical resonators, when combined with noise reduction techniques, have been shown capable of label-free single molecule detection, however, they still require a capture agent and prior knowledge of the target molecule. Optical frequency combs can potentially provide high precision spectroscopic information on molecules within the evanescent field of the microresonator; however, this has not yet been demonstrated in air or aqueous biological sensing. For aqueous solutions in particular, impediments include coupling and thermal instabilities, reduced Q factor, and changes to the mode spectrum. Here we overcome a key challenge toward single-molecule spectroscopy using optical microresonators: the generation of a frequency comb at visible to near-IR wavelengths when immersed in either air or aqueous solution. The required dispersion is achieved via intermodal coupling, which we show is attainable using larger microtoroids, but with the same shape and material that has previously been shown ideal for ultra-high sensitivity biosensing. We believe that the continuous evolution of this platform will allow us in the future to simultaneously detect and identify single molecules in both gas and liquid at any wavelength without the use of labels.

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Dirac solitons in optical microresonators

Cited by 27 publications

References 73 publications

Soliton pulse pairs at multiple colors in normal dispersion microresonators

Soliton pulse pairs at multiple colors in normal dispersion microresonators

Applications for optical frequency microcomb chips

Optical Frequency Combs in Aqueous and Air Environments at Visible to Near-IR Wavelengths

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