Laser cavity solitons and turing patterns in microresonator filtered lasers: Properties and perspectives

Pasquazi, Alessia; Bao, Hualong; Hanzard, Pierre-Henry; Rowley, Maxwell; Cutrona, Antonio; Chu, Sai T.; Morandotti, Roberto; Moss, David J.; Oppo, Gian-Luca; Peccianti, Marco

doi:10.1117/12.2576645

Cited by 12 publications

(10 citation statements)

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“…Even without this, however, using the discrete integrated comb sources to replace discrete laser arrays already yields significant benefits for RF and microwave systems in terms of performance, size, cost, and complexity. Finally, soliton crystals have recently [203][204][205][206][207][208][209][210][211][212][213][214][215] been shown to be able to achieve a range of RF functions without the need for any spectral shaping -only by triggering the different soliton states through different pumping conditions which yields different spectra. This adds an entirely new dimension to microcombs beyond what is possible with DKS states.…”

Section: Discussionmentioning

confidence: 99%

Photonic RF and Microwave Fractional Differentiation, Integration, and Hilbert Transforms With Kerr Optical Micro-Combs

Tan

Moss

2021

SSRN Journal

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Integrated Kerr micro-combs are a powerful source of multiple wavelength channels for photonic radio frequency (RF) and microwave signal processing, particularly for transversal filter systems. They offer significant advantages featuring a compact device footprint, high versatility, large numbers of wavelengths, and wide Nyquist bands. We present our recent progress on photonic RF and microwave high bandwidth temporal signal processing based on Kerr micro-combs with comb spacings from 49GHz to 200GHz. We focus on integral and fractional Hilbert transforms, differentiators as well as integrators. The future potential of optical micro-combs for RF photonic applications in terms of functionality and ability to realize integrated solutions is also discussed. Keywords-Microwave photonics, micro-ring resonators, signal processing, microcombs, Kerr combs. integrated micro-combs typically have much wider spacings from 10's to 100's of GHz and even into the THz regime. Larger comb spacings yield much wider Nyquist zones that are needed to achieve large RF bandwidths, whereas finer spacings provide much larger numbers of wavelengths or RF "taps", but at the cost of a much smaller Nyquist zone, or RF bandwidth. Micro-combs can provide higher numbers of wavelengths together with still being able to provide a large FSR, in a compact footprint. For RF transversal filters the number of taps, or wavelengths, dictates the available number of channels for, for example, RF true time delays as well as determining the performance of RF filters [85,121]. Other systems such as beamforming devices [112] can also be greatly improved in terms of their quality factor and angular resolution. Other innovative approaches to filtering include techniques such as RF bandwidth scaling [125] that provide a certain bandwidth for each wavelength channel, and so the total operation bandwidth (maximum RF signal bandwidth that can be processed) will depend on the number of wavelengths, and will therefore be significantly enhanced by the use of micro-combs.Recently [121], we reported transversal filtering and bandwidth scaling methods based on Kerr micro-combs applied to RF and microwave spectral filters. In this paper, we present our recent work on RF and microwave high bandwidth temporal signal processing based on integrated Kerr micro-comb devices. We achieve both integral and fractional order Hilbert transformers and differentiators, as well as RF integrators. We discuss the trade-offs involved between using wide spaced micro-combs with an FSR of 200GHz [109][110][111] with recently reported record low FSR spaced micro-combs at 49 GHz, based on soliton crystals [122][123][124][125][126][127][128]. We highlight their potential and future possibilities, contrasting the different methods and use of the differently spaced micro-combs. While 200GHz Kerr micro-combs have proven to be a powerful source for RF transversal filters, enabling high versatility as well as dynamic reconfigurability, the relatively large comb spacing FSR of ~1.6 nm restricts the n...

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Section: Discussionmentioning

confidence: 99%

Photonic RF and Microwave Fractional Differentiation, Integration, and Hilbert Transforms With Kerr Optical Micro-Combs

Tan

Moss

2021

SSRN Journal

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“…Finally, the two MRRs can be easily be integrated onto the same chip, with the frequency difference tuned by separate on-chip thermal micro-heater controls [90]. This work demonstrates that passive microring resonators offer a powerful addition to Kerr optical parametric oscillators [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][91][92][93][94][95][96][97][98][99][100][101] for microwave signal generation and processing.…”

Section: Continuously Tuneable Rf Sideband Generatormentioning

confidence: 99%

Photonic orthogonally polarized RF and microwave equalizers and single sideband generator

Tan

Moss

2021

Preprint

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We report narrowband orthogonally polarized optical RF single sideband generators as well as dual-channel RF equalization, both based on high-Q integrated ring resonators. The devices operate in the optical telecommunications C-band and enable RF operation over a range of either fixed or thermally tunable frequencies. They operate via TE/TM mode birefringence in the resonator. We achieve a very large dynamic tuning range of over 55 dB for both the optical carrier-to-sideband ratio and the dual-channel RF equalization for both the fixed and tunable devices.

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“…We have exploited soliton crystal states generated in record low FSR (49 GHz) micro-ring resonators (MRRs), thus generating a record large number of wavelengths, or taps, to achieve a wide range of high performance RF signal processing functions. These include RF filters [35], true time delays [30], RF integration [42], fractional Hilbert transforms [27], fractional differentiation [41], phase-encoded signal generation [26], arbitrary waveform generation [43], filters realized by bandwidth scaling [38], and RF channelizers [44] and much more [99][100][101][102][103][104][105][106][107][108][109][110].…”

Section: Introductionmentioning

confidence: 99%

Integral Order Photonic RF Signal Processors Based on Kerr Micro-combs

Tan¹,

Xu²,

Moss³

2021

Preprint

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Soliton crystal micro-combs are powerful tools as sources of multiple wavelength channels for radio frequency (RF) signal processing. They offer a compact device footprint, large numbers of wavelengths, very high versatility, and wide Nyquist bandwidths. Here, we demonstrate integral order RF signal processing functions based on a soliton crystal micro-comb, including a Hilbert transformer and first- to third-order differentiators. We compare and contrast results achieved and the tradeoffs involved with varying comb spacing, tap design methods, as well as shaping methods.

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Laser cavity solitons and turing patterns in microresonator filtered lasers: Properties and perspectives

Cited by 12 publications

References 0 publications

Photonic RF and Microwave Fractional Differentiation, Integration, and Hilbert Transforms With Kerr Optical Micro-Combs

Photonic RF and Microwave Fractional Differentiation, Integration, and Hilbert Transforms With Kerr Optical Micro-Combs

Photonic orthogonally polarized RF and microwave equalizers and single sideband generator

Integral Order Photonic RF Signal Processors Based on Kerr Micro-combs

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