Optical flywheels with attosecond jitter

Benedick, Andrew; Fujimoto, James G.; Kärtner, Franz X.

doi:10.1038/nphoton.2011.326

Cited by 153 publications

(89 citation statements)

References 30 publications

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“…Optical techniques for timing jitter measurements, such as the recently introduced balanced optical cross-correlation technique [5], confirmed that passively modelocked lasers show jitter levels of less than 3 fs for standard fiber lasers [11,12] and about 10 as for solid-state lasers due to their shorter pulses, higher intracavity pulse energy and lower intracavity loss [13]. In fact, this latter value is the lowest jitter or phase noise level ever observed in any oscillator.…”

Section: Timing Jitter Of Rf and Photonic Sourcesmentioning

confidence: 89%

Photonic ADC: overcoming the bottleneck of electronic jitter

Khilo¹,

Spector²,

Grein³

et al. 2012

Opt. Express

Self Cite

418

229

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Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck on the way towards higher speeds and better accuracy. Photonic ADCs, which perform sampling using ultra-stable optical pulse trains generated by mode-locked lasers, have been investigated for many years as a promising approach to overcome the jitter problem and bring ADC performance to new levels. This work demonstrates that the photonic approach can deliver on its promise by digitizing a 41 GHz signal with 7.0 effective bits using a photonic ADC built from discrete components. This accuracy corresponds to a timing jitter of 15 fs -a 4-5 times improvement over the performance of the best electronic ADCs which exist today. On the way towards an integrated photonic ADC, a silicon photonic chip with core photonic components was fabricated and used to digitize a 10 GHz signal with 3.5 effective bits. In these experiments, two wavelength channels were implemented, providing the overall sampling rate of 2.1 GSa/s. To show that photonic ADCs with larger channel counts are possible, a dual 20-channel silicon filter bank has been demonstrated. 289-296 (1992). 11. J. Kim, J. Chen, J. Cox, and F. X. Kärtner, "Attosecond-resolution timing jitter characterization of free-running mode-locked lasers using balanced optical cross-correlation," Opt. Lett. microwave signals at 40-GHz with higher than 7-ENOB resolution," Opt. ©2012 Optical Society of America

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Section: Timing Jitter Of Rf and Photonic Sourcesmentioning

confidence: 89%

Photonic ADC: overcoming the bottleneck of electronic jitter

Khilo¹,

Spector²,

Grein³

et al. 2012

Opt. Express

Self Cite

418

229

View full text Add to dashboard Cite

show abstract

“…Numerous advancements of such sources have been made [5][6][7][8][9][10], and in recent years there has been development of compact solidstate [11,12] and semiconductor-based systems that enable high-repetition-rate pulse generation [13][14][15][16][17]. However, it remains a challenge to create a highly compact, robust platform capable of producing femtosecond pulses over a wide range of wavelengths, durations, and repetition rates.…”

Section: Introductionmentioning

confidence: 99%

Modelocking and femtosecond pulse generation in chip-based frequency combs

Saha¹,

Okawachi²,

Shim³

et al. 2013

Opt. Express

233

163

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Abstract:We investigate simultaneously the temporal and optical and radio-frequency spectral properties of parametric frequency combs generated in silicon-nitride microresonators and observe that the system undergoes a transition to a mode-locked state. We demonstrate the generation of sub-200-fs pulses at a repetition rate of 99 GHz. Our calculations show that pulse generation in this system is consistent with soliton modelocking. Ultimately, such parametric devices offer the potential of producing ultrashort laser pulses from the visible to mid-infrared regime at repetition rates from GHz to THz.

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“…It has been demonstrated that valence-electron wave packets can evolve with a high degree of coherence for much longer than 10 fs [3]. Measuring the induced wave packet dynamics requires sub-femtosecond timing synchronization between pump and probe pulses, which has been experimentally demonstrated in attosecond science [3,47]. Here, we consider a coherent wave packet launched in a Br 2 molecule by a photoionizing pump pulse and imaged by an ultrafast x-ray probe pulse.…”

Section: Application To a Diatomic Homonuclear Moleculementioning

confidence: 99%

Imaging instantaneous electron flow with ultrafast resonant x-ray scattering

Popova-Gorelova

Santra

2015

Phys. Rev. B

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We propose a way to image dynamical properties of nonstationary electron systems using ultrafast resonant x-ray scattering. Employing a rigorous theoretical analysis within the framework of quantum electrodynamics, we demonstrate that a single scattering pattern from a nonstationary electron system encodes the instantaneous interatomic electron current in addition to the structural information usually obtained by resonant x-ray scattering from stationary systems. Thus, inelastic contributions that are indistinguishable from elastic processes induced by a broadband probe pulse, instead of being a concern, serve as an advantage for time-resolved resonant x-ray scattering. Thereby, we propose an approach combining elastic and inelastic resonant x-ray scattering for imaging dynamics of nonstationary electron systems in both real space and real time. In order to illustrate its power, we show how it can be applied to image the electron-hole current in an ionized diatomic molecule.

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Optical flywheels with attosecond jitter

Cited by 153 publications

References 30 publications

Photonic ADC: overcoming the bottleneck of electronic jitter

Photonic ADC: overcoming the bottleneck of electronic jitter

Modelocking and femtosecond pulse generation in chip-based frequency combs

Imaging instantaneous electron flow with ultrafast resonant x-ray scattering

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