Wide-Bandwidth, Tunable, Multiple-Pulse-Width Optical Delays Using Slow Light in Cesium Vapor

Camacho, Ryan M.; Pack, Michael V.; Howell, John C.; Schweinsberg, Aaron; Boyd, Robert W.

doi:10.1103/physrevlett.98.153601

Cited by 128 publications

(114 citation statements)

References 35 publications

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“…We show that this is possible by changing a single experimental parameter. seen, as observed in previous work [7,8,9]. A far off-resonant pulse is shown in 2(b)-(d).…”

Section: Propagation Of Optical Pulsessupporting

confidence: 71%

“…However, this requires intensities above saturation and the near-resonant character of the process leads to higher order terms in the dispersion resulting in considerable pulse distortion. Slow light has also been studied in off-resonant optical systems, utilising Doppler-broadened absorption resonances [7,8,9]. In such systems, group indices of ∼ 10 3 are achievable, with GHz pulse bandwidths.…”

mentioning

confidence: 99%

“…In such systems, group indices of ∼ 10 3 are achievable, with GHz pulse bandwidths. This broad bandwidth allows large fractional pulse delays of up to 80 [8]. Delaying pulses by more than their widths has applications in data synchronisation and qubit operations for quantum computing [10].…”

mentioning

confidence: 99%

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A gigahertz-bandwidth atomic probe based on the slow-light Faraday effect

et al. 2009

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The ability to control the speed and polarisation of light pulses will allow for faster data flow in optical networks of the future. Optical delay and switching have been achieved using slow-light techniques in various media, including atomic vapour. Most of these vapour schemes utilise resonant narrowband techniques for optical switching, but suffer the drawback of having a limited frequency range or high loss. In contrast, the Faraday effect in a Doppler-broadened slow-light medium allows polarisation switching over tens of GHz with high transmission. This large frequency range opens up the possibility of switching telecommunication bandwidth pulses and probing of dynamics on a nanosecond timescale. Here we demonstrate the slow-light Faraday effect for light detuned far from resonance. We show that the polarisation dependent group index can split a linearly polarised nanosecond pulse into left and right circularly polarised components. The group index also enhances the spectral sensitivity of the polarisation rotation, and large rotations of up to 15π rad are observed for continuous-wave light. Finally, we demonstrate dynamic broadband pulse switching, by rotating a linearly polarised nanosecond pulse from vertical to horizontal with no distortion and transmission close to unity.

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“…We show that this is possible by changing a single experimental parameter. seen, as observed in previous work [7,8,9]. A far off-resonant pulse is shown in 2(b)-(d).…”

Section: Propagation Of Optical Pulsessupporting

confidence: 71%

mentioning

confidence: 99%

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A gigahertz-bandwidth atomic probe based on the slow-light Faraday effect

et al. 2009

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“…A electronic resonance effect provides the lowest group velocity while the narrow bandwidth and the low temperature operation make it impractical for the use in large-capacity optical communication system [2][3][4][5][6][7]. Several GHz bandwidth and 0.3 bit delay have been reported using a phonon transition phenomenon resulting from stimulated Brillouin scattering along a few km long silica optical fiber, but it is still impractical [4,5].…”

Section: Introductionmentioning

confidence: 99%

All-Optical Delay Module Using Cascaded Polymer All-Pass-Filter Ring Resonators

Kim¹,

Ko²,

Kim³

et al. 2013

PIER Letters

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Abstract-An APF (All-Pass Filter) delay module in which eight single-ring resonators are serially cascaded is designed and fabricated. The polymer waveguide used for the realization of the APF delay module is a buried structure whose core width and height are 1.5 µm. The core and cladding index are 1.51 and 1.378, respectively, which corresponds to the relative index difference of 8%. In order to use a thermo-optic effect of polymer materials, electrodes are evaporated above the ring resonator to provide heating currents. The time delay is measured to be about 50 ps when 2 rings are in resonance, and about 105 ps and 150 ps, respectively, when 4 and 6 rings of APF are in resonance, respectively. When all of 8 rings are in resonance, the delay is measured to be about 200 ps.

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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%