Observation of Two-Photon Optical Free-Induction Decay in Atomic Sodium Vapor

Liao, P. F.; Bjorkholm, J. E.; Gordon, Joshua

doi:10.1103/physrevlett.39.15

Cited by 39 publications

(5 citation statements)

References 25 publications

(12 reference statements)

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“…On the other hand, the phenomena of optical nutation and free-induction decay (FID) were studied extensively in the early days after the invention of the laser [25][26][27][28][29][30], probably because of the realization that the equations governing such a system are formally equivalent to the well-studied spinresonance Bloch equation [31,32]. Recently, optical FID with long coherence time generated using cold atoms has been reported [33,34].…”

Section: Introductionmentioning

confidence: 99%

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

et al. 2010

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We report theoretical and experimental studies of the propagation of a square-modulated laser pulse through a laser-cooled atomic ensemble of two-level absorbers, as well as through a three-level system with electromagnetically induced transparency. We find that the transmission characteristics over a wide range of optical depth can be fully accounted for as optical coherent transients excited by the wide spectral content of the square-modulated optical pulse. We show that both time-domain atom-field coupled equations and frequency-domain linear dispersion theory give precisely the same description of the optical transients at a weak power limit. At low optical depth with moderate absorption, resonant excitation dominates and free-induction decay (FID) contributes mostly to the transient field. At high optical depth when absorption and propagation effects become significant, lossless optical precursors start to dominate the transient response. By varying the optical depth from 0 to 45, we observe that optical transients evolve gradually from FID to optical precursors. We thus show that FID and optical precursors, which have been considered as two different optical transients for many decades, can be unified within a single theoretical frame and they are the manifestations of the same physical process in two different regimes.

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Section: Introductionmentioning

confidence: 99%

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

et al. 2010

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“…There are previous studies related to the present work that have emphasized different aspects. These include photon echoes in dressed states [13][14][15], free induction decay in dressed states [16], quantum beats in dressed states [17], and numerous studies on two-photon transients [18][19][20][21][22]. The study of coherent transients the in pump-probe configuration also has important implications in the field of quantum computing as the pump field provides us with additional avenues of manipulating the coherent superposition of a quantum bit [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Coherent transient in dressed-state and transient spectra of Autler-Townes doublet

Zhang

Feng

et al. 2004

Phys. Rev. A

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In this paper we present a theoretical study of the time-dependent probe response in the presence of a strong pump field in a three-level pump-probe configuration. Two situations are investigated: a cw pump with a pulsed probe field and a pulsed pump with a cw probe field. The results are explained as dressed-state nutation and nutation by dynamic Stark switching. Dressed-state quantum beats are also an important feature for both situations. Furthermore, when a 90°phase shift after a / 2 period is introduced in the pulsed probe field, there is a spin locking in the dressed-state transition. Our results give a satisfactory theoretical account of a previous experimental observation [Wei et al., Phys. Rev. Lett. 74, 1083].

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“…This integral can be expressed analytically in terms of the error function W(z) of complex argument [7,8], taking the form for / < 217o-",…”

Section: Theorymentioning

confidence: 99%

“…This signal contains both absorptive and dispersive parts that depend on the initial laser frequency through the factor (w^, -ft)/o-. From (8), it is evident that the atomic sample radiates at the Dopplerpeak cuj,, independent of the initial laser frequency ft, and produces a heterodyne beat of frequency Wjj -ft'. We conclude, therefore, that ih the firstorder FID the various velocity packets destructively interfere, except at Doppler line center.…”

Section: Short Time Limitmentioning

confidence: 99%

Subnanosecond Optical Free-Induction Decay

DeVoe

Brewer

1979

IBM J. Res. & Dev.

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A novel form of laser frequency switching is devised that extends coherent optical transient studies to a 100-picosecond time scale, the measurements being performed in real time. Free-induction decay (FID) on a subnanosecond time scale reveals new features, such as a first-order FID that dephases with the inhomogeneous dephasing time T^ and interferes with the well-known nonlinear FID. A complete analytical expression for optical FID is derived and supports our FID observations for the sodium D^ transition.

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Observation of Two-Photon Optical Free-Induction Decay in Atomic Sodium Vapor

Cited by 39 publications

References 25 publications

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

Optical coherent transients in cold atoms: From free-induction decay to optical precursors

Coherent transient in dressed-state and transient spectra of Autler-Townes doublet

Subnanosecond Optical Free-Induction Decay

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