Four-level atomic interferometer driven by shaped ultrafast laser pulses

Clow, Stephen D.; Weinacht, Thomas

doi:10.1103/physreva.82.023411

Cited by 10 publications

(9 citation statements)

References 22 publications

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“…cially important to studying phase-dependent interactions [2,3,8], to optimizing single-photon generation setups [21,22], and to explaining 4WM spectra observed in many experiments [7,14,15] or possible magnetic field effects. This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

“…1, is frequently used. Applications include: coherent interaction of atoms with ultrashort laser pulses, useful for interferometric measurements [2], and coherent control [3]. In the continuous-wave regime, atoms in diamond configuration demonstrate high resonant non-linearities that enable generation of coherent blue and infrared light [4][5][6][7] via four-wave mixing (4WM), as well as strong phase-dependent response [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interference and nonlinear properties of four-wave-mixing resonances in thermal vapor: Analytical results and experimental verification

Parniak¹,

Wasilewski²

2015

Phys. Rev. A

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We develop a model to calculate nonlinear polarization in a nondegenerate four-wave mixing in diamond configuration which includes the effects of hyperfine structure and Doppler broadening. We verify the model against the experiment with 5 2 S 1/2 , 5 2 P 3/2 , 5 2 D 3/2 and 5 2 P 1/2 levels of rubidium 85. Treating the multilevel atomic system as a combination of many four-level systems we are able to express the nonlinear susceptibility of a thermal ensemble in a low-intensity regime in terms of Voigt-type profiles and obtain an excellent conformity of theory and experiment within this complex system. The agreement is also satisfactory at high intensity and the analytical model correctly predicts the positions and shapes of resonances. Our results elucidate the physics of coherent interaction of light with atoms involving higher excited levels in vapors at room temperature, which is used in an increasing range of applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interference and nonlinear properties of four-wave-mixing resonances in thermal vapor: Analytical results and experimental verification

Parniak¹,

Wasilewski²

2015

Phys. Rev. A

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“…[33] Up to now, the studies of few-level systems interacting with such ultrashort laser pulses have focused on manifestations of the CEP. [37][38][39][40][41] For example, a quantum beat signal [37] induced in a three-level system, four-level atomic interferometer, [40] and the population of quantum states of polar molecules. [41] As a consequence, the study on the phase dependent effects in optical physics has become a hot topic and further research will help us to deepen the understanding of coherent control.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast population transfer in a Λ-configuration level system driven by few-cycle laser pulses

et al. 2013

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The feasibility of population transfer from a populated level via an intermediate state to the target level driven by fewcycle pulses is theoretically discussed. The processes of on-or far-resonance stimulated Raman scattering with sequential or simultaneous ultrashort pulses are investigated respectively. We find that the ultrashort pulses with about two optical cycles can be used to realize the population operation. This suggests that the population transfer can be completed in the femtosecond time scale. At the same time, our simulation shows that the signal of the carrier-envelope-phase-dependent effect can be enlarged due to quantum interference in some conditions. Our theoretic study may promote the research on the coherent control via ultrashort pulses in the related fields.

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“…There also exist interferometric schemes that use nonlinearities and multiplicative wave-mixing elements in order to process the field phases. Nonlinear wave-mixing processes such as twophoton absorption [5] and four-wave mixing (FWM) [6][7][8][9] as well as closed-loop atomic interferometers [10][11][12] have been considered, and features such as the interference between multiple quantum transition amplitudes, squeezing and the parametric amplification within the interferometer have been utilized to enhance the sensitivity, resolution and visibility. Quantum interferometry is an active field of research, and exotic states of light are being tested as interferometric probes [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Measurement of two independent phase shifts using coupled parametric amplifiers

2012

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In this paper, we demonstrate a scheme capable of two-phase measurement, i.e. the simultaneous measurement of two phase shifts occurring in two independent Mach-Zehnder interferometers using one intensity detector. Our scheme utilizes dark-state-enhanced coupled parametric amplifiers in an atomic medium to mix the multiple fields probing the various arms of the interferometers in parallel. The two phase differences are then encoded in separate continuous-variable parameters in the spectral waveform of the parametrically amplified atom-radiated signal field, which can be directly decoupled in a single intensity measurement. Besides resolving two phase differences in parallel, this method can also be used to increase the channel capacity in optical and quantum communication by the simultaneous use of phase modulation and amplitude modulation.

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Four-level atomic interferometer driven by shaped ultrafast laser pulses

Cited by 10 publications

References 22 publications

Interference and nonlinear properties of four-wave-mixing resonances in thermal vapor: Analytical results and experimental verification

Interference and nonlinear properties of four-wave-mixing resonances in thermal vapor: Analytical results and experimental verification

Ultrafast population transfer in a Λ-configuration level system driven by few-cycle laser pulses

Measurement of two independent phase shifts using coupled parametric amplifiers

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