Expect more delays

Mok, Joe T.; Eggleton, Benjamin J.

doi:10.1038/433811a

Cited by 93 publications

(37 citation statements)

References 7 publications

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“…The first experimental demonstrations of slow and fast light in optical fibres were achieved using SBS [5] first AT EPFL in Switzerland [6] and independently a few months later at Cornell University in USA [7]. This approach demonstrated that efficient delays can be realized using SBS.…”

Section: Slow and Fast Light In Optical Fibres Using Stimulated Brilloumentioning

confidence: 98%

Achievements in slow and fast light in optical fibres

Thévenaz

2008

2008 10th Anniversary International Conference on Transparent Optical Networks

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The ubiquitous role occupied by optical fibres in modern photonic systems has steadily stimulated research to realize slow and fast light devices directly in this close-to-perfect transmission line. This potentially offers the key advantage of a direct and flexible integration in most existing optical systems. The recent progress in the realization of optically-controlled delays in optical fibres, under normal environmental conditions and in the high-transparency spectral region, has paved the way towards real applications based on slow and fast light. This presentation shows the state-of-the-art research in this fascinating field and the possible outcomes in the near future.

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Section: Slow and Fast Light In Optical Fibres Using Stimulated Brilloumentioning

confidence: 98%

Achievements in slow and fast light in optical fibres

Thévenaz

2008

2008 10th Anniversary International Conference on Transparent Optical Networks

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“…Experimental solutions have been found to overcome this difficulty and the first demonstrations of SBS-induced slow and fast light 14 in optical fibres were reported in 2005 initially at EPFL in Switzerland 15 and independently a few months later at Cornell University in the USA (ref. 9).…”

Section: Review Article | Focusmentioning

confidence: 99%

Slow and fast light in optical fibres

2008

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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...

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“…There have been a variety of approaches to realize optical delay modules [4][5][6][7][8][9][10][11][12][13][14][15][16]. A CROW (Coupled resonator optical waveguide) [5][6][7][8] has drawn interest for all-optical packet communication or optical signal processing modules because it can reduce the propagation speed variably.…”

Section: Introductionmentioning

confidence: 99%