Large tunable delay with low distortion of 10 Gbit/s data in a slow light system based on narrow band fiber parametric amplification

Shumakher, E.; Willinger, A.; Blit, R.; Dahan, David; Eisenstein, G.

doi:10.1364/oe.14.008540

Cited by 60 publications

(23 citation statements)

References 11 publications

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“…To achieve a better match between the gain spectral linewidth and the bandwidth of multigigabit-per-second signals, another approach using the process of parametric amplification based on the Kerr optical nonlinearity has been proposed 26,27 . In this process the idler wave is another optical wave and the three waves involved in the interaction are co-propagating.…”

Section: Optical Parametric Amplificationmentioning

confidence: 99%

“…For instance, the ultrabroadband nature of Raman scattering in optical fibres results in a poor delaying efficiency at bandwidths compatible with practical data-transmission systems, and so far no further developments were reported since the first publication 25 . Optical parametric amplification based on the Kerr effect is very sensitive to the fluctuations of the chromatic dispersion along the fibre, which cause an uncontrolled broadening and distortion of the gain spectral distribution 27 .…”

Section: Special-fibre Approachesmentioning

confidence: 99%

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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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Section: Optical Parametric Amplificationmentioning

confidence: 99%

Section: Special-fibre Approachesmentioning

confidence: 99%

Slow and fast light in optical fibres

2008

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“…To engineer dispersion characteristics in optical fibers, various physical phenomena have been utilized over the last few years, such as stimulated Brillouin [42,44] and stimulated Raman [46] scatterings, narrow-band optical parametric amplification [40] and coherent population oscillation [41,59]. However, it turns out that stimulated Brillouin scattering in fibers is the most efficient nonlinear mechanism for the generation of slow light due to its high intrinsic gain and its large flexibility for spectral tailoring at any operating wavelength.…”

Section: Laser and Photonics Reviewsmentioning

confidence: 99%

Tunable photonic delay lines in optical fibers

Chin

Thévenaz

2012

Laser & Photonics Reviews

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A comprehensive overview is presented about optical fiber-based tunable photonic delay lines, which have been steadily developed over the last decade for the realization of all-optically controlled timing functions. The most widely used techniques, such as those based on slow & fast light and wavelength conversion associated to dispersion, are described and their physical limitations are discussed in terms of the maximal achievable delay, the associated signal distortion and signal bandwidth. Besides, an entirely different approach for all-optical signal delaying is introduced. This technique is based on movable grating reflectors dynamically generated in highly birefringent optical fibers. This type of delay line has experimentally demonstrated large tunable delaying with a moderate signal distortion for high capacity optical data streams and even for wideband analog signals.

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“…Another approach based on the parametric amplification generated by the Kerr optical nonlinearity [10] was also proposed shortly after, that presents the advantage to show a bandwidth more compatible with the very high data rate exceeding 10 Gbit/s, however at the expense of a pump power in the Watt range. In this approach the bandwidth can be modified to a large extent by judiciously placing pump and signal in the fiber dispersion curve.…”

Section: Approaches For Slow Light In Optical Fibersmentioning

confidence: 99%