Slowdown of nanosecond light pulses with photorefractive two-wave mixing

Bouldja, Nacera; Tsyhyka, Mykhailo; Grabar, A. A.; Sciamanna, Marc; Wolfersberger, Delphine

doi:10.1103/physreva.105.l021501

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…We have demonstrated that the use of a high-pulsed laser can decrease the response time of the crystal and slow down a light pulse with a duration of the order of the nanosecond. 8 In this work, we have experimentally shown that the PR crystal can slow down the nanosecond light pulse and, without distortion using the Two-wave mixing effect performed with a pulsed laser. Also, we demonstrate that the delay values can be controlled by both the laser beam intensity and the input width of the input light pulse.…”

mentioning

confidence: 92%

All-optical tunable slow-light systems based on a TWM in a photorefractive crystal

Bouldja

Sciamanna²,

Grabar³

et al. 2023

Quantum Sensing, Imaging, and Precision Metrology

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We experimentally propose a technique to demonstrate an optical slow-light system using the two-wave mixing (TWM) process in a photorefractive (PR) crystal at room temperature. This technique uses the refractive index variation that occurs in the PR material at room temperature. In this paper, we show that the time delay and the bandwidth of the transmitted pulses can be easily tuned by varying both laser beam intensities and the widths of the input pulses. In addition, time delays of short light pulses are observed with modest pulse distortions at the output of the PR crystal using a pulsed laser at the nanosecond regime.

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confidence: 92%

All-optical tunable slow-light systems based on a TWM in a photorefractive crystal

Bouldja

Sciamanna²,

Grabar³

et al. 2023

Quantum Sensing, Imaging, and Precision Metrology

Self Cite

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show abstract

“…2 Alternatively, several works have demonstrated that PR crystals are promising materials for studying the slowing down of light pulses. [3][4][5] On the other hand, PR crystals offer advantages over traditional optical fibers. One significant advantage is their ability to slow down even short and long light pulses across a wide range of wavelengths, extending from the visible 4,6 to the infrared domain.…”

mentioning

confidence: 99%

“…7 Our recent work has demonstrated that the use of the PR two-wave mixing (TWM) effect in the pulsed regime effectively decelerates nanosecond light pulses at 1064 nm. 5 Using this method, we reduced the response time of the crystal to 32 ns and introduced a delay of the order of 1 ns in a 10 ns-light pulse without distortion at the material output.…”

mentioning

confidence: 99%

Photorefractive slow light at 1310nm

Bouldja,

Alexander Grabar,

Sciamanna

et al. 2024

Nonlinear Optics and Its Applications 2024

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In this work, we experimentally demonstrate the capacity of the photorefractive (PR) crystal to control the group velocity of light pulses, specifically at the telecommunication wavelength, by using the so-called beam fanning at room temperature. Significantly, we show for the first time that this method can effectively decelerate a modulated signal propagating through this material at 1310 nm. Furthermore, we illustrate that the performance of this slow light system can be adjusted by changing the intensity, duration, and angle of polarization of the input pulse. The results obtained through this technique can potentially improve the performance of specific components in telecommunication networks.

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Nonlinear dispersion of backward-wave four-wave mixing in a photorefractive semiconductor and its effect on group velocity

Shcherbin,

Mathey,

Shumelyuk

et al. 2024

J. Opt. Soc. Am. B

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Photorefractive backward-wave four-wave mixing may be configured for the amplification of the phase conjugate output and the attenuation of the transmitted output. The nondegenerate-in-frequency interaction is studied in such a configuration, realized in a semiconductor CdTe crystal. The spectra measured at different outputs show the gain and attenuation resonances. The preliminary study of optical pulse propagation demonstrates that, due to different nonlinear dispersions at different outputs of the selected wave mixing configuration, a slowing down of light is observed at the phase conjugate output, while an acceleration of light is detected at the transmitted output for the same input pulse at the same interaction.

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Slowdown of nanosecond light pulses with photorefractive two-wave mixing

Cited by 4 publications

References 22 publications

All-optical tunable slow-light systems based on a TWM in a photorefractive crystal

All-optical tunable slow-light systems based on a TWM in a photorefractive crystal

Photorefractive slow light at 1310nm

Nonlinear dispersion of backward-wave four-wave mixing in a photorefractive semiconductor and its effect on group velocity

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