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IEEE Journal of Quantum Electronics

Issue 7 • Date July 1988

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Displaying Results 1 - 25 of 29
  • The two-photon Rydberg atom micromaser

    Publication Year: 1988, Page(s):1323 - 1330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (873 KB)

    A Rydberg atom maser operated on a two-photon degenerate atomic transition is discussed. This device combines two interesting features: it is a quantum oscillator working on an intrinsically nonlinear effect and it is a micromaser, with only a few atoms and a few tens of photons at a time in the cavity. The reasons why Rydberg atom-superconducting cavity systems are well adapted for two-photon mas... View full abstract»

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  • Physical interpretation of operator dynamics in the Jaynes-Cummings model

    Publication Year: 1988, Page(s):1338 - 1345
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    By means of simple mathematical methods, typical properties of the quantum dynamics in the Jaynes-Cummings model are discussed. The methods used allow a clear physical interpretation in the sense of an ensemble average and permit an investigation of the influence of the initial photon distribution width on collapse and revivals. Results obtained by a more sophisticated treatment provide correction... View full abstract»

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  • On spontaneous emission

    Publication Year: 1988, Page(s):1346 - 1350
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The problem of the spontaneous emission from a single excited two-level atom in the presence of N unexcited similar atoms is discussed. A formalism is presented for evaluation of the time-development operator (and thus the density matrix) which has certain desirable features for time-dependent problems in the area, e.g. of atom-field interactions, when the off-diagonal elements are large ... View full abstract»

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  • Single-atom cavity-enhanced absorption. I. Photon statistics in the bad-cavity limit

    Publication Year: 1988, Page(s):1351 - 1366
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    The photon statistics of the transmitted light from a driven cavity containing a single resonant two-level atom are studied in the bad-cavity limit. For weak driving fields, the second-order intensity correlation function shows novel nonclassical behavior due to the interference of the driving field and forward reradiation from the atom. This behavior is related to squeezing in the cavity transmis... View full abstract»

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  • Atomic resonance filters

    Publication Year: 1988, Page(s):1266 - 1277
    Cited by:  Papers (7)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1124 KB)

    The atomic resonance filter (ARF) is an ultranarrowband (Q~105-106), large-acceptance-angle, isotropic optical filter. These features make the device ideally suited for applications in which weak laser signals are detected against a continuum background. The filter properties arise from the physical processes of absorption, emission, and internal energy conversion in... View full abstract»

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  • Quantum theory of a one-dimensional optical cavity with output coupling. V. Spontaneous emission

    Publication Year: 1988, Page(s):1367 - 1375
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    For pt.IV see J. Phys. Soc. Japan, vol.47, p.217-224 (1982). Spontaneous emission in a lossy one-dimensional cavity is analyzed under the perturbation approximation and the Wigner-Weisskopf approximation. The cavity loss due to output coupling is treated quantum mechanically by the use of a set of continuously distributed radiation modes. The enhancement and reduction factors in the spontaneous em... View full abstract»

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  • Resonance fluorescence spectra of two driven two-level atoms

    Publication Year: 1988, Page(s):1376 - 1382
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A theoretical analysis is developed for the spectrum of the light scattered by two two-level atoms driven near resonance by an external coherent electromagnetic field. The atoms are assumed to relax to equilibrium with the driving field as a result of radiation damping. The explicit dependence of the coherent dipole-dipole interactions on the distance between the two atoms is taken into account. F... View full abstract»

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  • Theory of output beam divergence in pulsed unstable resonators

    Publication Year: 1988, Page(s):1302 - 1311
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The evolution of the far-field pattern of pulsed large-Fresnel-number unstable resonators is analyzed. Both geometrical optic and physical optic descriptions are given as a function of the number of trips around the unstable resonator. The analysis determines apparent size and distance to the image of the spontaneous emission source, as seen from the output aperture by looking back through multipl... View full abstract»

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  • A proposed chemically pumped laser based on the bX transition in O2

    Publication Year: 1988, Page(s):1278 - 1288
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Simple kinetics calculations demonstrate that the well-known electronic energy pooling reaction involving O2(a 1Δ) is capable of producing an effective population inversion in O2(b1Σ). The densities of O2(a1Δ) which are potentially achievable suggest that the extractable energy storage de... View full abstract»

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  • Spontaneous excitation of atoms near a phase conjugating mirror

    Publication Year: 1988, Page(s):1383 - 1387
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    It is shown by means of a semiclassical theory that the ground state of a localized collection of two-level atoms is unstable when the atomic sample is sufficiently close to a phase-conjugating mirror with high gain. Any small disturbance causes the atoms to become excited and begin fluorescing, the fluorescence taking the form of a sequence of superradiant pulses. Experiments to test this predict... View full abstract»

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  • Photon statistics and quantum jumps: the picture of the dressed atom radiative cascade

    Publication Year: 1988, Page(s):1395 - 1402
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    The statistics of spontaneous photon emission times in single atom resonance fluorescence are investigated through the radiative cascade of the dressed atom. The delay function which gives the distribution of the delays between two successive emissions is calculated for a coherent as well as an incoherent laser excitation. For a two-level atom, various signals that reflect the fluorescence intensi... View full abstract»

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  • Semiclassical theory of multimode operation of a distributed feedback laser

    Publication Year: 1988, Page(s):1248 - 1257
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    Nonlinear self-consistency equations, including for the first time the effects of mode competition, are derived for index and gain gratings. Additional terms to those contained in self-consistency equations for lasers with a conventional resonator are found. Approximate analytic solutions for single- and two-mode operation of distributed-feedback (DFB) lasers are obtained with the help of the ener... View full abstract»

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  • Filamentation in conventional double heterostructure and quantum well semiconductor lasers

    Publication Year: 1988, Page(s):1297 - 1301
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A wave-optical model is used to investigate filamentation of the optical field in conventional double heterostructure and quantum well semiconductor lasers. The field is propagated by the Crank-Nicholson method, and the gain model is based on a semiclassical laser theory that contains the effects of cross relaxation due to electron-electron and electron-phonon collisions. The model predicts that f... View full abstract»

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  • Quantum jumps in a system of few trapped ions

    Publication Year: 1988, Page(s):1413 - 1419
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A theory of quantum jumps in a system of few trapped ions is formulated. The V configuration of the energy levels and incoherent pumping are assumed. The master equation is derived in terms of the SU(3) collective operators for the V system. Numerical results for the intensity-intensity correlations for up to five ions are presented. Analytical results for a system of two ions ar... View full abstract»

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  • Correspondence principles: the relationship between classical trajectories and quantum spectral

    Publication Year: 1988, Page(s):1445 - 1452
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The general correspondence principle specifies a relationship between wave functions and families of trajectories. For bounded systems with regular trajectories, this general correspondence principle leads to the principle of quantization of action. The general principle also leads to a correspondence principle for finite-resolution spectra: oscillation in the average density of states, or in the ... View full abstract»

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  • Theory and experiments on the power modulation of CO2 lasers

    Publication Year: 1988, Page(s):1289 - 1296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The operation of a pulsed transverse flow CO2 laser system with RF excitation is studied theoretically by computer simulation. The calculations are supported by experimental results which confirm that the pulse repetition frequency of the system is restricted by the time delay between the electric and the laser pulse and by relaxation oscillations. The time delay is roughly inversely pr... View full abstract»

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  • Bistability in the radiation pressure on two-level atoms in a ring cavity

    Publication Year: 1988, Page(s):1388 - 1394
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A simple model for the interaction of a beam of two-level atoms with a running radiation model in a ring cavity is formulated. The occurrence of optical bistability significantly affects the radiation pressure force on atoms. Hysteresis effects are predicted for the transverse component of atomic velocity which couples with the electric field View full abstract»

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  • Quantum jump statistics for two-atom systems

    Publication Year: 1988, Page(s):1403 - 1412
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    The quantum jump statistics in the fluorescence intensity from two three-level atoms is studied. A rate-equation description valid for strong driving fields is derived, and a partial analysis of quantum jump statistics which goes beyond the strong-excitation limit is presented. As the main result, it is shown that collective effects, such as unusual intensity levels and double quantum jumps, can o... View full abstract»

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  • Operating characteristics of single-quantum-well AlGaAs/GaAs high-power lasers

    Publication Year: 1988, Page(s):1258 - 1265
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The operating characteristics of six types of graded-index separate confinement heterostructure single-quantum-well wide-stripe lasers grown by metalorganic chemical vapor deposition are reported. The lasers exhibited intrinsic mode losses as low as 3 cm-1 and internal quantum efficiencies near unity. Measured differential gain coefficients range from 3.7 to 6.5 cm/A, and extrapolated t... View full abstract»

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  • FIR emissions from a laser cavity having a zig-zag axis

    Publication Year: 1988, Page(s):1231 - 1234
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    FIR emissions in three directions from a FIR NH3 laser cavity having a zig-zag axis were observed when radiation from a pump CO 2 laser with multiple or single modes was linearly injected into the cavity. The temporal variation and Fabry-Perot interferogram of these emissions showed that the FIR zig-zag emission is dominated by a laser process due to a population inversion, w... View full abstract»

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  • Numerical analysis of the feedback regimes for a single-mode semiconductor laser with external feedback

    Publication Year: 1988, Page(s):1242 - 1247
    Cited by:  Papers (83)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The effect of external feedback on a single-mode semiconductor laser is estimated by a numerical solution of the nonlinear rate equations. The analysis yields an excellent description of published experimental results. It is found that the lasing mode with the minimum linewidth is most stable rather than the mode with minimum threshold gain. The transition to the coherence-collapse regime is of pa... View full abstract»

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  • Hydrogen atom in monochromatic field: chaos and dynamical photonic localization

    Publication Year: 1988, Page(s):1420 - 1444
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2024 KB)

    The quantum localization phenomenon that strongly limits any quantum process of diffusive ionization that may be started in systems subjected to a periodic perturbation is discussed. In the case of a highly excited hydrogen atom in a monochromatic field, this phenomenon is theoretically analyzed by reducing the dynamics to appropriate mappings. It is shown that if the field strength is less than a... View full abstract»

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  • Quantum collapse and revival of Rydberg atoms in cavities of arbitrary Q at finite temperature

    Publication Year: 1988, Page(s):1331 - 1337
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Numerical calculations on the Jaynes-Cummings model in a cavity of arbitrary Q at finite temperature, using the master equation approach, are discussed. Effects due to mismatch of the atomic transition frequency and cavity mode frequency are included. Results relate to recent experiments on 85Rb Rydberg atoms View full abstract»

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  • Small systems: when does thermodynamics apply?

    Publication Year: 1988, Page(s):1320 - 1322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    The validity of using temperature to describe quantitatively the state of excitation of an isolated nucleus is examined. The problem arises because of the small number of particles in a nucleus. As a consequence, it is possible to construct a heat bath and so fix the temperature. Another definition is used that leads to an uncertainty in the measured temperature which tends to zero as the number o... View full abstract»

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  • Quantum resonances and strong field ionization

    Publication Year: 1988, Page(s):1453 - 1460
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The phenomenon of subthreshold ionization of quantum systems in an intense monochromatic field is discussed. A particularly simple system exhibiting this phenomenon is studied both analytically and numerically. The spectral properties of the quasi-energy-operator of the system are emphasized. The notion of doorway states is defined, and their importance in the mechanism of ionization is shown. The... View full abstract»

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Aims & Scope

The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics..

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Aaron R. Hawkins
Brigham Young University