Micro-combs: A novel generation of optical sources

Pasquazi, Alessia; Peccianti, Marco; Razzari, Luca; Moss, David J.; Coen, Stéphane; Erkintalo, Miro; Chembo, Yanne K.; Hansson, Tobias; Wabnitz, Stefan; Del’Haye, Pascal; Xue, Xiaoxiao; Weiner, Andrew M.; Morandotti, Roberto

doi:10.1016/j.physrep.2017.08.004

Cited by 627 publications

(529 citation statements)

References 329 publications

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“…The power threshold for the generation of secondary comb lines was ~500 mW, with our measurements typically performed at roughly 0.8W pump power (in-fibre before coupling on to the chip). Owing to the ultra-high Q factor and small footprint of the MRR, the resulting Type II Kerr optical comb [37,43] (Fig. 4(b)) was over 200-nm wide, flat over ~32 nm, indicating that in principle, more than 100 channels were available.…”

Section: High-resolution Phased Array Antennamentioning

confidence: 99%

“…Kerr micro-comb sources [32][33][34][35][36][37][38][39], particularly those based on CMOS-compatible platforms featuring a high nonlinear figure of merit [34][35][36], offer many advantages over discrete laser sources, such as the potential to provide a much higher number of wavelengths, a greatly reduced footprint and complexity, as well as significantly improved performance. In particular, for RF transversal functions the number of wavelengths dictates the available channel number of RF time delays.…”

Section: Introductionmentioning

confidence: 99%

“…First, Kerr combs were generated based on an integrated MRR. When the wavelength of the pump light was tuned into one of the MRR resonances, with the pump power high enough to provide sufficient parametric gain, optical parametric oscillation occurred [32][33][34][35][36][37][38][39], ultimately generating Kerr optical combs with nearly equal line spacing (as shown in Fig. 1(a)).…”

Section: Introductionmentioning

confidence: 99%

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Advanced RF and microwave functions based on an integrated optical frequency comb source

et al. 2018

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Abstract:We demonstrate advanced transversal radio frequency (RF) and microwave functions based on a Kerr optical comb source generated by an integrated micro-ring resonator. We achieve extremely high performance for an optical true time delay aimed at tunable phased array antenna applications, as well as reconfigurable microwave photonic filters. Our results agree well with theory. We show that our true time delay would yield a phased array antenna with features that include high angular resolution and a wide range of beam steering angles, while the microwave photonic filters feature high Q factors, wideband tunability, and highly reconfigurable filtering shapes. These results show that our approach is a competitive solution to implementing reconfigurable, high performance and potentially low cost RF and microwave signal processing functions for applications including radar and communication systems.

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Section: High-resolution Phased Array Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advanced RF and microwave functions based on an integrated optical frequency comb source

et al. 2018

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“…All of these system are photonic mostly utilising a carrier signal at an optical frequency and RF or microwave repetition rates. The most popular ways to generate such combs include mode-locked lasers 7 , (four)wave mixing/Kerr nonlinearity [8][9][10][11] . Despite the fact that phononic systems also play an important role in metrology and spectroscopy, demonstration of phononic or acoustic wave combs have been sporadic 12 .…”

mentioning

confidence: 99%

Generation of ultralow power phononic combs

Goryachev

Galliou

Tobar

2020

Phys. Rev. Research

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We demonstrate excitation of phononic frequency combs in a Bulk Acoustic Wave system at a temperature of 20mK using a single tone low power signal source. The observed ultra low power threshold is due to a combination of very high quality factor of 4.2 × 10 8 and relatively strong nonlinear effects. The observed repetition rate of the comb varies from 0.7 to 2Hz and spans over tens of Hz. The demonstrated system is fully excited via piezoelectricity and does not require mode spectra engineering and external optical or microwave signals. It is shown that the comb profile significantly depends on geometry of excitation and detection electrodes. Observed strong Duffing nonlinearity below the generation threshold suggests that the system is a phononic analogue to Kerr frequency combs excited in monolithic optical microresonators. The ultra-low power regime opens a way of integrating this phononic system with quantum hybrid systems such as impurity defects and superconducting qubits.Photonic frequency combs generators are an important tool used for many scientific applications allowing to couple distant parts of frequency spectrum 1 . Amongst others, these important applications include ultra stable clocks and frequency metrology 2-4 and spectroscopy 5,6 . All of these system are photonic mostly utilising a carrier signal at an optical frequency and RF or microwave repetition rates. The most popular ways to generate such combs include mode-locked lasers 7 , (four)wave mixing/Kerr nonlinearity [8][9][10][11] . Despite the fact that phononic systems also play an important role in metrology and spectroscopy, demonstration of phononic or acoustic wave combs have been sporadic 12 . Moreover, their complexity, requirements to design a certain mode structure, very high threshold powers 13 and requirement for extra laser sources 14 make these systems inapplicable for many low energy applications. In these applications Bulk Acoustic Wave (BAW) devices found very extensive use, e.g. frequency metrology 15 , quantum hybrid systems 16-18 and fundamental physics tests [19][20][21][22] . Additionally both bulk and surface acoustic wave devices are utilised for spectroscopy 23 , detection and sensors [24][25][26] . Recently nonlinear dynamics of mechanical systems including comb generation has also became a subject of theoretical research 27 . All these areas could benefit from designing devices with frequency comb functionality.To excite frequency combs at low power levels, one needs a system with low losses and strong nonlinear effects. For these reasons, in this work, we employ a phonon trapping 28 SC-cut 29 quartz BAW cavity 30 operating at 20mK. The device is an SC-cut plano-convex shaped plate of 1mm thickness, 23mm diameter and 300mm the radius of curvature. Quartz BAW cavities have demonstrated extremely high values of Quality factors at cryogenic temperatures reaching the level of a) Electronic mail: maxim.goryachev@uwa.edu.au 8 × 10 919,30 . In the same time these devices are able to demonstrate a significant levels of non...

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“…Since the first demonstrations of optical phase‐locking and the first mode‐locked laser developments, the capability to generate precisely timed periodic trains of optical pulses has pushed forward many fields of science and technology. Extensive effort has been further devoted to the generation and control of optical frequency combs, the frequency‐domain counterpart of time‐periodic coherent optical pulse trains. A frequency comb consists of a set of equally‐spaced spectral components (comb lines), with a frequency spacing referred to as the free spectral range (FSR).…”

Section: Introductionmentioning

confidence: 99%

Arbitrary Energy‐Preserving Control of Optical Pulse Trains and Frequency Combs through Generalized Talbot Effects

Cortés

Maram

Chatellus

et al. 2019

Laser & Photonics Reviews

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Trains of optical pulses and optical‐frequency combs are periodic waveforms with deep implications for a wide range of scientific disciplines and technological applications. Recently, phase‐only signal‐processing techniques based upon the theory of Talbot self‐imaging have been demonstrated as simple and practical means for user‐defined periodicity control of optical pulse trains and combs. The resulting schemes implement a desired repetition period control without introducing any noise or distortion, while ideally preserving the entire energy content of the signal. Here, recent developments on phase‐only signal‐processing schemes for periodicity control based on temporal and spectral self‐imaging are reviewed. As a central contribution, a comprehensive theory of generalized Talbot self‐imaging, so called phase‐controlled Talbot effect, is presented, comprising all the different approaches proposed to date. In particular, a closed unified mathematical framework for the design of the spectral and temporal phase manipulations that enable full arbitrary control of the period of repetitive signals is developed. The reported numerical studies fully validate the presented theoretical framework and shed light on crucial aspects of the proposed methods, consistently with previously reported experimental results. Important considerations concerning the practical, real‐world implementation of the described schemes, according to the needed specifications for different applications, are also discussed.

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Micro-combs: A novel generation of optical sources

Cited by 627 publications

References 329 publications

Advanced RF and microwave functions based on an integrated optical frequency comb source

Advanced RF and microwave functions based on an integrated optical frequency comb source

Generation of ultralow power phononic combs

Arbitrary Energy‐Preserving Control of Optical Pulse Trains and Frequency Combs through Generalized Talbot Effects

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