Optimal pump profile designs for broadband SBS slow-light systems

Pant, Ravi; Stenner, Michael D.; Neifeld, Mark A.; Gauthier, Daniel J.

doi:10.1364/oe.16.002764

Cited by 76 publications

(75 citation statements)

References 28 publications

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“…It must be pointed out that it is perfectly possible to synthesize any amplification spectral profile in a Brillouin fibre amplifier, by simply shaping the pump spectrum [6,8,9]. Fig.…”

Section: Distortion In a Linear Slow Light Systemmentioning

confidence: 99%

Slow light in optical fibers: State-of-the-art and perspectives 10 years after the first demonstration

Thévenaz

2015

2015 Opto-Electronics and Communications Conference (OECC)

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“…It must be pointed out that it is perfectly possible to synthesize any amplification spectral profile in a Brillouin fibre amplifier, by simply shaping the pump spectrum [6,8,9]. Fig.…”

Section: Distortion In a Linear Slow Light Systemmentioning

confidence: 99%

Slow light in optical fibers: State-of-the-art and perspectives 10 years after the first demonstration

Thévenaz

2015

2015 Opto-Electronics and Communications Conference (OECC)

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“…For equal pump powers and gain bandwidths, such a tailored gain spectrum introduces 30-40% longer delays than a standard Lorentzian resonance. This approach was further developed to optimize both the delay and the distortion, and it was found that the ideal gain spectral distribution was approximately square-shaped 8,[39][40][41] .…”

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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“…Actually the exploitation of the SBS interaction is not restricted to its natural resonance characteristics as observed using a CW pumping, but its spectral characteristics can be engineered to a wide extent using a modulated pump or combining Brillouin gain and loss spectra using multiple pumps. For instance the bandwidth of the Brillouin spectral resonance can be shaped by a spectrally broadened pump to extend the bandwidth to many GHz [4,5] or to optimize the delaying efficiency [6,7]. The superposition of Brillouin gain and loss spectra generated by distinct pumps can produce a composite spectral resonance that can lead to optical delays with no amplitude change [8] and to a theoretically unlimited bandwidth [9].…”

Section: Introductionmentioning

confidence: 99%