Subfemtosecond pulse generation by nonadiabatic molecular modulation

Jian Wu; Heping Zeng
September 2003
Applied Physics Letters;9/15/2003, Vol. 83 Issue 11, p2127
Academic Journal
We suggest a technique to generate subfemtosecond pulse train in a Raman generator driven by three sufficiently intense single-mode laser beams whose carrier frequencies are tuned off the Raman resonance with two different two-photon detunings. The Raman interaction establishes a molecular modulation through a nonadiabatic process. The simulation based on the first fundamental vibrational Raman transition of solid hydrogen indicates that subfemtosecond pulse train can be generated when the signs of the two-photon detunings are opposite. This opens an experimentally feasible way to observe enhanced generation of broadband Raman sidebands as well as compression of the phase-locked Raman sidebands into subfemtosecond pulse trains in the same Raman media with above- and below-resonance Raman excitations. © 2003 American Institute of Physics.


Related Articles

  • Raman amplification of ultrashort light pulses in inhomogeneously broadened three-level systems. Kozlov, V. V.; Kozlova, E. B. // Optics & Spectroscopy;Jul2009, Vol. 107 Issue 1, p129 

    In the limit of pulse durations that are shorter than the characteristic times of atomic decays, the dynamics of the propagation of a probe light pulse under the action of a driving pulse in the form of a self-induced transparency soliton applied to the adjacent transition of the V-scheme is...

  • A new method for generating ultraintense and ultrashort laser pulses. Ren, Jun; Weifeng Cheng; Shuanglei Li; Suckewer, Szymon // Nature Physics;Oct2007, Vol. 3 Issue 10, p732 

    The output power of any laser system is limited by the power that any of its individual components can withstand without being destroyed. This increases the size, complexity and cost of next-generation lasers built using conventional optical-gain media. But by using a plasma, which is impervious...

  • On the precursor in laser-generated ultrasound waveforms in metals. McDonald, F. Alan // Applied Physics Letters;1/15/1990, Vol. 56 Issue 3, p230 

    A laser pulse, when focused on a metal sample, produces characteristic elastic waveforms, which depend on whether thermoelastic or ablative/evaporative mechanisms dominate the generation process. In the thermoelastic regime, with an unconstrained surface, the predominant axial displacement is...

  • Recent Results in Generation of Powerful Pulses of 75GHz Radiation at ELMI-Device. Arzhannikov, Andrei V.; Ginzburg, Naum S.; Ivanenko, Viktor G.; Kalinin, Peter V.; Kuznetsov, Alexander S.; Kuznetsov, Sergei A.; Peskov, Nikolai Yu.; Sinitsky, Stanislav L.; Stepanov, Vasilii D. // AIP Conference Proceedings;2002, Vol. 650 Issue 1, p307 

    Discusses results on studies which involved the generation of powerful laser pulses carried out at the ELMI-device. Description of the experimental device; Wave diagnostics; Efficiency of transformation; Profile of the scattered wave amplitude.

  • Project of Powerful 4-beam Planar FEM with Distributed Feedback for 75 GHz Band. Arzhannikov, Andrei V.; Bobylev, Vladimir B.; Ginzburg, Naum S.; Kalinin, Petr V.; Kuznetsov, Sergei A.; Peskov, Nikolai Yu.; Petrov, Petr V.; Sergeev, Aleksandr S.; Sinitsky, Stanislav L.; Stepanov, Vasilii D. // AIP Conference Proceedings;2002, Vol. 650 Issue 1, p303 

    Presents solutions to pointed problems for a four-channel pulse generator. General arrangement of the four-channel pulse generator; Synchronization of the channels.

  • Controlled dumping of pulses of laser radiation ranging from MIR to the MM by means of optical semiconductor switching. Marchetti, S.; Martinelli, M.; Simili, R.; Giorgi, M.; Fantoni, R. // Applied Physics B: Lasers & Optics;2001, Vol. 72 Issue 8, p927 

    Abstract. A simple method to produce sub-ns pulses of laser radiation with wavelength ranging from middle infrared (MIR) to millimeter (MM) is experimentally demonstrated. The system operates with a single OSS (optical semiconductor switching) driven by a ns Nd laser. Pulse control is produced...

  • Backward and forward stimulated Raman scattering from thin foil targets with a 0.26 μm laser. Labaune, C.; Baldis, H. A.; Fabre, E.; Briand, F.; Villeneuve, D. M.; Estabrook, K. // Physics of Fluids B: Plasma Physics;Jan90, Vol. 2 Issue 1, p166 

    Time-resolved spectra of backward and forward stimulated Raman scattering were measured from the interaction of 0.26 μm laser radiation with foil targets. The plastic foil targets were designed to go underdense before the peak of the 450 psec, 2×1015 W/cm2 laser pulse. The Raman spectra...

  • Improved gas-filled hohlraum performance on Nova with beam smoothing. Kauffman, Robert L.; Powers, L.V. // Physics of Plasmas;May98, Vol. 5 Issue 5, p1927 

    Examines improved gas-filled hohlraum performance on Nova with beam smoothing. Factors influencing reduced radiation temperature on the Nova experiments of gas-filled hohlraums; Discussion on Raman scattering losses and filamentation effects; Comparison on between implosion symmetry shift and...

  • Raman forward scattering of chirped laser pulses. Schroeder, C. B.; Esarey, E.; Shadwick, B. A.; Leemans, W. P. // Physics of Plasmas;Jan2003, Vol. 10 Issue 1, p285 

    Raman scattering of a high-intensity, short-duration, frequency-chirped laser pulse propagating in an underdense plasma is examined. The growth of the direct forward scattered light is calculated for a laser pulse with a linear frequency chirp in various spatiotemporal regimes. This includes a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics