Distortion management in slow-light pulse delay

Stenner, Michael D.; Neifeld, Mark A.; Zhu, Ziwei; Dawes, Andrew M. C.; Gauthier, Daniel J.

doi:10.1364/opex.13.009995

Cited by 161 publications

(109 citation statements)

References 19 publications

Supporting

Mentioning

107

Contrasting

Order By: Relevance

“…The result of the convolution is to produce a double resonance, and if the peak separation is comparable to the natural Brillouin linewidth, the overlapping of the resonances generates a reverse slope and fast light can be realized in a gain regime 32 . This situation is depicted in Fig.…”

Section: Modulation Using a Discrete Line Spectrummentioning

confidence: 99%

Slow and fast light in optical fibres

2008

View full text Add to dashboard Cite

The ubiquitous role of optical fibres in modern photonic systems has stimulated research to realize slow and fast light devices directly in this close-to-perfect transmission line. Recent progress in developing optically controlled delays in optical fibres, operating under normal environmental conditions and at telecommunication wavelengths, has paved the way towards real applications for slow and fast light. This review presents the state-of-the-art research in this fascinating field and possible outcomes in the near future. The development of high-quality silica optical fibres with excellent transmission capabilities has directly contributed to the tremendous expansion of the global communication network. The success is due to their unrivalled low-loss performance (typically 50% of light is still present after a 15-km transmission distance), their wide bandwidth, which allows terabits per second of information to be transmitted over more than 1,000 km, and also their extremely low production cost. Realizing tunable delays for optical data signals directly in fibres, as well as integrating such devices into existing communication networks, is certainly a very attractive approach for optimizing the flow of data traffic in future networks. The approach may also enhance the capabilities of optical and microwave-on-optical-carrier signal processing. Given the limited possibilities for engineering the dispersion curve of standard single-mode fibres without creating complex photonic-crystal structures (see pages 448 and 465 of this issue 1,2 ), much research on fibre-based delays has been directed towards solutions based on spectral resonances to generate slow and fast light. The initial pioneering demonstrations of slow and fast light in various media all exploited narrow spectral resonances, typically created by electromagnetically induced transparency 3 or coherent population oscillation 4 . Narrow spectral resonances have a dramatic effect on optical propagation, as any sharp spectral change in the medium's transmission curve results in a steep quasi-linear variation of the effective refractive index with wavelength in the narrow spectral region near the resonance. This in turn results in a strong change in the group velocity at the exact centre of the resonance 5 . The velocity change is strongest for narrower spectral resonances (as explained in detail below) and for this reason, the early experiments were all carried out in special media, such as ultracold atomic gases or atomic transitions in a crystalline solid at a well-defined wavelength. Luc ThévenazWithin the resonance, the relationship between the change in the optical transmission and the delay can be determined as follows. The refractive-index change, Δn, as a function of the optical frequency, ν, is calculated using the Kramers-Kronig transformation, and the index change associated with the group velocity, Δn g , is then found using the relationship Δn g = Δn + ν(dΔn/dν) (ref. 5). Finally, the delay, ΔT, added to the normal transit time in the medium...

show abstract

Section: Modulation Using a Discrete Line Spectrummentioning

confidence: 99%

Slow and fast light in optical fibres

2008

View full text Add to dashboard Cite

show abstract

“…Using two [9,10], three [11][12][13], or more [14][15][16] closely spaced pump frequencies, it is possible to minimize the effects of higher-order dispersion on the delayed pulses. For example, Stenner et al [9] introduced a general distortion metric and used it to show that optimizing over a larger number of physical variables can increase the distortion-constrained delay. They demonstrated this concept by comparing the optimum slow-light pulse delay achievable using a single Lorentzian gain line with that achievable using a pair of closely-spaced gain lines.…”

Section: Minimizing Pulse Distortionmentioning

confidence: 99%

Progress on Stopped Light and Large-Delay Slow Light in Optical Fibers

Gauthier¹

2007

Integrated Photonics and Nanophotonics Research and Applications / Slow and Fast Light

Self Cite

View full text Add to dashboard Cite

show abstract

“…These group delays, easily controlled by the pump power, have made SBS a favorable underlying mechanism in many studies of slow and fast light [2][3]. Many efforts have been dedicated over the last four years to broadening the usable bandwidth of SBS slow light, and to reducing the distortion of the delayed signals [4][5][6][7][8]. Both high rate digital data [7][8][9], and broadband radar signals [10], were successfully delayed.…”

Section: Introductionmentioning

confidence: 99%