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  1. No Access

    Article

    Frailty status and altered dynamics of circulating energy metabolism hormones after oral glucose in older women

    Frailty status is associated with altered glucose-insulin dynamics. Here, we sought to investigate whether alteration in the dynamics of other circulating energy metabolism hormones after oral glucose is assoc...

    Rita Rastogi Kalyani, R. Varadhan, C. O. Weiss… in The journal of nutrition, health & aging (2012)

  2. No Access

    Chapter

    Spatial Resonator Solitons

    Spatial solitons can exist in various kinds of nonlinear optical resonators with and without amplification. In past years, different types of these localized structures, such as vortices, bright, dark solitons...

    V.B. Taranenko, G. Slekys, C.O. Weiss in Dissipative Solitons (2005)

  3. No Access

    Chapter and Conference Paper

    Spatial Semiconductor-Resonator Solitons

    We demonstrate experimentally and numerically the existence of spatial solitons in multiple-quantum-well semiconductor microresonators driven by an external coherent optical field. We discuss stability of the ...

    V. B. Taranenko, C. O. Weiss in Optical Solitons (2003)

  4. No Access

    Article

    Incoherent optical switching of semiconductor resonator solitons

    We demonstrate experimentally the bistable nature of the bright resonator solitons in a semiconductor microresonator with mixed absorptive/defocusing nonlinearity and show that they can be written and erased b...

    V.B. Taranenko, C.O. Weiss in Applied Physics B (2001)

  5. No Access

    Article

    Spatial solitons in a semiconductor microresonator

    We show experimentally the existence of bright and dark spatial solitons in a passive quantum-well-semi-conductor resonator of large Fresnel number with mixed absorptive defocusing nonlinearity. Several of the...

    V.B. Taranenko, I. Ganne, R. Kuszelewicz, C.O. Weiss in Applied Physics B (2001)

  6. No Access

    Chapter

    Spatial Solitons in Nonlinear Resonators

    We discuss solitons in nonlinear resonators. In particular we discuss the cases of “laser” resonator, laser resonator containing a nonlinear absorber, parametric mixing and semiconductor microresonator. In the...

    C. O. Weiss, V. B. Taranenko, M. Vaupel, K. Staliunas… in Soliton-driven Photonics (2001)

  7. No Access

    Article

    Stability of localized structures in degenerate wave mixing

    We give experimental proof of the stability of (supercritical) spatial phase solitons in degenerate wave mixing.

    V.B. Taranenko, M. Zander, P. Wobben, C.O. Weiss in Applied Physics B (1999)

  8. No Access

    Article

    Solitons and vortices in lasers

    We give in this article the mathematical background for pattern formation in nonlinear active resonators, elucidating the relation of optics with other fields of physics, and demonstrate experimentally the exi...

    C.O. Weiss, M. Vaupel, K. Staliunas, G. Slekys, V.B. Taranenko in Applied Physics B (1999)

  9. No Access

    Article

    Nanometer thin-film Ni-NiO-Ni diodes for mixing 28 THz CO2-laser emissions with difference frequencies up to 176 GHz

    -laser emissions near 28 THz (10.7 μm) with thin-film nanometer-scale Ni-NiO-Ni diodes (MOM, MIM) connected to integrated bow-tie antennas and integrated rhodium waveguides. Difference frequencies up to 176 GH...

    C. Fumeaux, W. Herrmann, F.K. Kneubühl, H. Rothuizen, B. Lipphardt… in Applied Physics B (1998)

  10. No Access

    Article

    Heating of cold cesium atoms by blue-detuned laser radiation

    B. Bahar, J. Castellanos, U. Hübner, C.O. Weiss in Applied Physics B (1998)

  11. No Access

    Chapter and Conference Paper

    Flow Patterns in an Optical Channel

    It is known that any type of Schroedinger equation can be transformed by means of the Madelung-transformation1 into a set of hydrodynamic equations for the density and the momentum of a fluid. For a class-A-laser...

    M. Vaupel, C. O. Weiss in Coherence and Quantum Optics VII (1996)

  12. No Access

    Article

    Models, predictions, and experimental measurements of far-infrared NH3-laser dynamics and comparisons with the Lorenz-Haken model

    Dynamics of the intensity and optical field amplitude of a coherently pumped far-infrared NH3-laser are measured and characterized. The experimental findings in certain parameter ranges closely follow the dynamic...

    C. O. Weiss, R. Vilaseca, N. B. Abraham, R. Corbalán, E. Roldán… in Applied Physics B (1995)

  13. No Access

    Article

    Cooperative frequency locking and tristability in a class-B laser

    The locking and unlocking phenomena of the modes of the transverse familyq=1 in a CO2 laser are investigated. The experimental results show three characteristic regions: a bistability between two helical waves of...

    G. Slekys, K. Staliunas, M. F. H. Tarroja, C. O. Weiss in Applied Physics B (1994)

  14. No Access

    Chapter

    Fluid Analogies in Optics

    Recent experimental as well as analytical/numerical investigations of lasers have shown surprising analogies with the fields of fluid dynamics, superfluids, and superconductors. The phenomena observed include ...

    C. O. Weiss, K. Staliunas, C. P. Smith… in Singularities in Fluids, Plasmas and Optics (1993)

  15. No Access

    Article

    Phase dynamics of a detuned single-mode laser

    We report measurements on the phase dynamics of a detuned single mode laser which has in the past shown correspondence to the complex Lorenz equation. The corresponding ranges of periodic pulsing, of detuned c...

    D. Y. Tang, C. O. Weiss in Applied Physics B (1992)

  16. No Access

    Chapter and Conference Paper

    Dislocations in Laser Fields

    Screw dislocations or vortices have recently been observed in laser fields and calculated from the laser equations. These defects are particle-like solutions. In the experiments the dislocations are found to f...

    C. O. Weiss, Chr. Tamm… in Evolution of Dynamical Structures in Complex Systems (1992)

  17. No Access

    Article

    Sixtieth order harmonic mixing to 4.25 THz using a Schottky diode

    Harmonic mixing of mm-waves with radiation of 3.7 THz with different Schottky diodes is reported. The highest mixing order is 60 producing a beat between 72 GHz and 4.25 THz radiation. Such high frequency mixi...

    Y. C. Ni, C. O. Weiss in International Journal of Infrared and Millimeter Waves (1990)

  18. No Access

    Article

    Simple frequency measurement chain to 30 THz

    We report harmonic mixing experiments between a 72 GHz mm-wave and 3.7 THz NH3-laser radiation, as well as between 3.7 THz and the 10 μm R(30) CO2-laser line. For the former mixing a semiconductor diode is used, ...

    Y. C. Ni, C. O. Weiss in Applied Physics B (1990)

  19. No Access

    Article

    Comparison of NH3 laser dynamics with the extended lorenz model

    We present a comparison of the intensity and the electric field measured from an optically pumped FIR NH3 laser showing instabilities with the respective results obtained from numerical integration of the Lorenz ...

    C. O. Weiss, W. Klische, N. B. Abraham, U. Hübner in Applied Physics B (1989)

  20. No Access

    Chapter and Conference Paper

    Coherent Frequency Measurements of the Hfs-Resolved Methane Line

    We have set up a coherent frequency measurement chain to measure the frequency of the central component of the v 3 (7) HFS multiplet of methane at 88 THz, which was resolved by a linear optical Rams...

    G. Kramer, C. O. Weiss, B. Lipphardt in Frequency Standards and Metrology (1989)

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