Velocity-selective spectroscopy of Rb vapor with a train of short pulses and a diode laser

García-Wong, A.C.; Almeida, A. A. C. de; Melo, Natália Rodrigues de; Vianna, S. S.

doi:10.1016/j.optcom.2018.07.012

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…Once again, as we scan E a , it will have the resonance frequency of the closed transition, as the box II indicates in figure 2(b). For each velocity group, the optical pumping due to E b lowers the absorption of E a and generates the three peaks in the opposite order of energy growth [22][23][24]. We also note that the transmission of the scanning laser T a is embedded with the Doppler profile of absorption, while the transmission from the fixed frequency laser T b is over a flat background.…”

Section: Experimental Setup and Resultsmentioning

confidence: 66%

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

Alvarez¹,

Almeida²,

Vianna³

2021

J. Phys. B: At. Mol. Opt. Phys.

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We report experimental and theoretical results of two symmetrical signals of degenerate four-wave mixing generated in rubidium vapor. Both nonlinear signals are induced by two almost copropagating laser beams, with k ⃗ a and k ⃗ b wave-vectors, and detected simultaneously in the 2 k ⃗ a − k ⃗ b and 2 k ⃗ b − k ⃗ a directions. In each direction, we observe a single peak when the two beams are tuned on the closed transition 85Rb 5S 1/2(F = 3) → 5P 3/2(F = 4). The excitation spectra reveal a small frequency separation between the two peaks, which is explained when propagation effects are taken into account. Furthermore, our theoretical analysis shows that a correct description of the frequency position of each peak is achieved with a variable refractive index for both lasers, in which the scanning laser experiences an anomalous window in the refractive index near resonance.

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Section: Experimental Setup and Resultsmentioning

confidence: 66%

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

Alvarez¹,

Almeida²,

Vianna³

2021

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…2(b). For each velocity group, the optical pumping due to E b lowers the absorption of E a and generates the three peaks in the opposite order of energy growth [22][23][24].…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

Alvarez¹,

Almeida²,

Vianna³

2020

Preprint

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We report experimental and theoretical results of two symmetrical signals of degenerate four-wave mixing generated in rubidium vapor. Both nonlinear signals are induced by two almost copropagating laser beams, with ka and k b wave-vectors, and detected simultaneously in the 2 ka − k b and 2 k b − ka directions. In each direction, we observe a single peak when the two beams are tuned on the closed transition 85 Rb 5S 1/2 (F = 3) → 5P 3/2 (F = 4). The excitation spectra reveal a small frequency separation between the two peaks, which is explained when propagation effects are taken into account. Furthermore, our theoretical analysis shows that a correct description of the frequency position of each peak is obtained only if coherent effects such as electromagnetically induced absorption are included.

show abstract

Velocity-selective spectroscopy of Rb vapor with a train of short pulses and a diode laser

Cited by 2 publications

References 27 publications

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

Two symmetric four-wave mixing signals generated in a medium with anomalous refractive index

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