Analysis of pulse distortion in Brillouin slow light using broadband pump with rectangular spectrum

Zhang, Zhiyao; Xiaojun, Zhou; Shi, Sheng‐Cai; Rui, Liang

doi:10.7498/aps.59.4694

Acta Phys. Sin.

2010

DOI: 10.7498/aps.59.4694

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Analysis of pulse distortion in Brillouin slow light using broadband pump with rectangular spectrum

Zhiyao Zhang¹,

Zhou Xiaojun²,

Sheng‐Cai Shi³

et al.

Abstract: Assuming a Gaussian-shaped input signal pulse, we deduced the analytical expression of the output-pulse amplitude envelope in the Brillouin slow light system utilizing broadband pump with a rectangular spectrum under small-signal gain approximation. The expression is applicable in case that the pump spectrum has a sharp rising or trailing edge and a flat top. The influence of the fiber dispersion, the stimulated Brilouin scattering (SBS) gain non-uniformity and the SBS-gain-induced dispersion on the pulse dist… Show more

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Cited by 3 publications

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“…In case of small signal gain, the transmission relationship of the signal pulse in angular frequency domain is expressed as 24)…”

mentioning

confidence: 99%

Time advancement and distortionless of optical pulses via stimulated Brillouin scattering by broadband pump in optical fibers

Lei

Che

Hou

et al. 2022

Jpn. J. Appl. Phys.

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The broadening Brillouin absorption spectrum of stimulated Brillouin scattering (SBS) in optical fibers by multiple monochromatic pumps is investigated. The results show that the bottom of the effective absorption spectrum becomes flatter with increasing the number of spectrum lines, and the spectral bandwidth is effectively expanded by multiple monochromatic pumps. but the spectral spacing should be tailored reasonably to ensure a broad linear range of the refractive index to reduce the pulse distortion. The time advancement and the pulse distortion induced by SBS pumped by broadband Gaussian and rectangular spectra are demonstrated respectively. The simulation results indicate that the pulse distortion induced by broadband rectangular spectral pump is smaller than that of broadband Gaussian spectral pump, and the time advancement can be improved effectively by increasing signal light power. We believe that these results are very promising for designing optical buffering or sensing components based on SBS fast light.

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“…In case of small signal gain, the transmission relationship of the signal pulse in angular frequency domain is expressed as 24)…”

mentioning

confidence: 99%

Time advancement and distortionless of optical pulses via stimulated Brillouin scattering by broadband pump in optical fibers

Lei

Che

Hou

et al. 2022

Jpn. J. Appl. Phys.

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Dependence of slowing light in vertical-cavity surface-emitting laser on saturation effect

Ya-Nan¹,

Luo²,

Pan³

et al. 2012

Acta Phys. Sin.

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The dependence of slowing light on the saturation effect in the vertical-cavity surface-emitting laser (VCSEL) is demonstrated. Combining the boundary conditions with the optical field distribution in VCSEL, the phase expression and the delay expression of the signal are derived. Based on these expressions and the rate equation, the relation between signal power and time delay is presented. Then the experimental demonstration shows the delays and the eye diagrams of a 2.5 Gbps pseudo-random binary sequence (PRBS) signal, when the VCSEL is working in the saturation condition. The theoretical and experimental results show that the high-power signal transmitted in the VCSEL could achieve better signal quality at the expense of the lower time delay. In order to obtain larger delay, on the one hand, the signal power should be controlled. On the other hand, the signal wavelength should be carefully adjusted to track the peak gain wavelength of the VCSEL caused by the saturation effect.

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Group velocity manipulation of far off-resonant pulse-pair in atomic system

Jiang¹,

Liu²,

Liu³

et al. 2015

Acta Phys. Sin.

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Based on the far off-resonant four-wave mixing process, the slow light propagations of the amplified probe and generated conjugate pulses are obtained experimentally. Simultaneous manipulations of group velocity are realized by changing the two-photon detuning between the pump light and the probe light. The dependences of gains of the injected probe and generated conjugate light on the one-photon detuning for continuous wave mode are studied at different cesium vapor temperatures and pump light powers. It is shown that the maximum of gains occurs at the proper Raman one-photon detuning. The dependence of delay time on the two-photon detuning is measured using the 6 μs and 365 ns probe pulses, respectively. For the 6 μs input probe pulse, the maximum delay times of the probe and the conjugate pulses are 2.1 μs and 1.9 μs with the fractional delays of 0.35 and 0.32, respectively, corresponding to 0.000119 c and 0.000132 c group velocity. The high fractional delays of 2.07 and 1.83 with the maximum delay times of 756 ns and 670 ns for the 365 ns input pulse are obtained.

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Analysis of pulse distortion in Brillouin slow light using broadband pump with rectangular spectrum

Cited by 3 publications

References 39 publications

Time advancement and distortionless of optical pulses via stimulated Brillouin scattering by broadband pump in optical fibers

Time advancement and distortionless of optical pulses via stimulated Brillouin scattering by broadband pump in optical fibers

Dependence of slowing light in vertical-cavity surface-emitting laser on saturation effect

Group velocity manipulation of far off-resonant pulse-pair in atomic system

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