Gain-assisted pulse advancement using single and double Brillouin gain peaks in optical fibers

Song, Kwang Yong; Gonzalez-Herraez, Miguel; Thévenaz, Luc

doi:10.1364/opex.13.009758

Cited by 103 publications

(82 citation statements)

References 19 publications

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“…These areas are characterized by pulse advancement and signal gain rather than loss, as previously reported by other authors [15]. In this paper, a maximum pulse advancement of 5 ns was obtained.…”

Section: Resultssupporting

confidence: 86%

Slowing of Pulses to c/10 With Subwatt Power Levels and Low Latency Using Brillouin Amplification in a Bismuth-Oxide Optical Fiber

Misas

Petropoulos

Richardson

2007

J. Lightwave Technol.

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Abstract-We report the generation of slow light using Brillouin amplification in a short length of highly nonlinear bismuth-oxide fiber. By using just 2 m of fiber, we demonstrate a five-fold reduction in group velocity for ∼200-ns pulses, which we believe to be a record for a slow-light propagation in an optical fiber. Moreover, by virtue of the high nonlinearity per unit length of this fiber, we achieve this at a very modest pump power level of just ∼400 mW and with a low inherent device latency of 14 ns. These results highlight both the merits and practicality of using high nonlinearity nonsilica fibers for slow-light devices.

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Section: Resultssupporting

confidence: 86%

Slowing of Pulses to c/10 With Subwatt Power Levels and Low Latency Using Brillouin Amplification in a Bismuth-Oxide Optical Fiber

Misas

Petropoulos

Richardson

2007

J. Lightwave Technol.

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“…The ability to modify the SBS gain spectrum was soon identified after the pioneering experiments on SBS delaying, and the first demonstration was realized using the simplest polychromatic spectrum made of just two frequency components 31 . 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 .…”

Section: Modulation Using a Discrete Line Spectrummentioning

confidence: 99%

“…In the particular case REVIEW ARTICLE | FOCUS of the two-frequency pump, the delay can be continuously tuned by changing the frequency separation between the two spectral lines instead of varying the pump power, and may even enable switching from slow to fast light propagation 31 .…”

Section: Modulation Using a Discrete Line Spectrummentioning

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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“…Slow light propagation can be achieved by using the techniques of electromagnetically induced transparency (EIT) [1][2][3][4], coherent population oscillations (CPO) [5][6], coherent hole burning (CHB) [7][8], two-wave mixing [9], stimulated Brillouin scattering (SBS) [10], stimulated Raman scattering (SRS) [11], and so on. In superluminal area Brillouin showed theoretically that inside an absorption line the dispersion is anomalous, which resulted in a group velocity faster than c in 1960 [12], and negative group velocity of -c/(300 + 30) in Cs atom vapor was found in 2000 [13].…”

Section: Introductionmentioning

confidence: 99%

Observation of Superluminal in Doppler Broadened Two-Level Atomic Systems in Magnetic Field

Liu¹,

Zhang²,

Wu³

et al. 2010

JMP

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Gain-assisted pulse advancement using single and double Brillouin gain peaks in optical fibers

Cited by 103 publications

References 19 publications

Slowing of Pulses to c/10 With Subwatt Power Levels and Low Latency Using Brillouin Amplification in a Bismuth-Oxide Optical Fiber

Slowing of Pulses to c/10 With Subwatt Power Levels and Low Latency Using Brillouin Amplification in a Bismuth-Oxide Optical Fiber

Slow and fast light in optical fibres

Observation of Superluminal in Doppler Broadened Two-Level Atomic Systems in Magnetic Field

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