TITLE

Propagation of an intense laser beam in a tapered plasma channel

AUTHOR(S)
Jha, Pallavi; Singh, Ram Gopal; Upadhyaya, Ajay K.; Mishra, Rohit K.
PUB. DATE
March 2008
SOURCE
Physics of Plasmas;Mar2008, Vol. 15 Issue 3, p033101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Propagation characteristics and modulation instability of an intense laser beam propagating in an axially tapered plasma channel, having a parabolic radial density profile, are studied. Using the source-dependent expansion technique, the evolution equation for the laser spot is set up and conditions for propagation of the laser beam with a constant spot size (matched beam) are obtained. Further, the dispersion relation and growth rate of modulation instability of the laser pulse as it propagates through linearly and quadratically tapered plasma channels, have been obtained.
ACCESSION #
31520942

 

Related Articles

  • Efficient terahertz generation from two collinearly propagating CO2 laser pulses. Jiang, Yi; Ding, Yujie J. // Applied Physics Letters;8/27/2007, Vol. 91 Issue 9, p091108 

    Coherent terahertz pulses have been generated at 328.2 μm (914.1 GHz) by frequency-mixing two CO2 laser lines near 10 μm based on collinearly phase-matched difference-frequency generation in GaSe crystals. The highest average output power was measured to be 260 μW, corresponding to a...

  • Electrical beam steering of Y-coupled quantum cascade lasers. Ahn, S. I.; Mujagic, E.; Nobile, M.; Detz, H.; Kalchmair, S.; Andrews, A. M.; Klang, P.; Schrenk, W.; Strasser, G. // Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p141113 

    The authors describe electrical beam steering of mid-infrared quantum cascade lasers with a monolithically integrated Y-coupled cavity and electrically separated branches. The deflection of the laser beam is achieved without any additional components such as optic or mechanic systems. This is...

  • Laser hole cutting in Kevlar: modeling and quality assessment. Al-Sulaiman, F.; Yilbas, B. S.; Karakas, F. C.; Ahsan, M.; Mokheimer, E. M. A. // International Journal of Advanced Manufacturing Technology;Oct2008, Vol. 38 Issue 11/12, p1125 

    Machining of Kevlar laminates with conventional methods results in poor end-product quality and excessive specific energy requirement for machining. However, laser machining has considerable advantages over the conventional methods due to precision and rapid processing. In the present study,...

  • Improvement of the beam quality of a broad-area diode laser using double feedback from two external mirrors. Chi, Mingjun; Bøgh, Niels-Søren; Thestrup, Birgitte; Petersen, Paul Michael // Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1107 

    In this letter, a symmetric double-feedback configuration, to improve the beam quality of broad-area diode lasers is demonstrated. With this configuration, a symmetric double-lobed far field can be obtained, and this configuration leads to good beam quality. The beam quality factor M2 of a diode...

  • Generation of megawatt-power terahertz pulses by noncollinear difference-frequency mixing in GaAs. Tochitsky, S. Ya.; Ralph, J. E.; Sung, C.; Joshi, C. // Journal of Applied Physics;7/15/2005, Vol. 98 Issue 2, p026101 

    Terahertz pulses with a peak power of ∼2 MW were generated in a noncollinear phase-matched GaAs crystal at room temperature. Efficient difference-frequency generation was achieved using 250-ps CO2 laser pulses for which the surface damage threshold increased in comparison with standard...

  • Generation of a radially polarized doughnut mode of high quality. Quabis, S.; Dorn, R.; Leuchs, G. // Applied Physics B: Lasers & Optics;Sep2005, Vol. 81 Issue 5, p597 

    We present an experimental set-up to generate laser beams with locally varying polarization distribution. In a linear set-up, a radially polarized beam of high quality regarding intensity distribution, polarization and phase-front distortion is generated. This beam can be used for tight...

  • Development of an in situ peak intensity measurement method for ultraintense single shot laser-plasma experiments at the Sandia Z petawatt facility. Link, Anthony; Chowdhury, Enam A.; Morrison, John T.; Ovchinnikov, Vladimir M.; Offermann, Dustin; Van Woerkom, Linn; Freeman, Richard R.; Pasley, John; Shipton, Erik; Beg, Farhat; Rambo, Patrick; Schwarz, Jens; Geissel, Matthias; Edens, Aaron; Porter, John L. // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10E723 

    Using the physical process of ultraintense field ionization of high charge states of inert gas ions, we have developed a method of peak intensity measurement at the focus of high energy short pulse lasers operating in single shot mode. The technique involves detecting ionization products created...

  • Soliton self-frequency shift of 6-fs pulses in photonic-crystal fibers. Serebryannikov, E. E.; Zheltikov, A. M.; Ishii, N.; Teisset, C.; Köhler, S.; Fuji, T.; Metzger, T.; Krausz, F.; Baltuška, A. // Applied Physics B: Lasers & Optics;Sep2005, Vol. 81 Issue 5, p585 

    Raman soliton phenomena in photonic crystal fibers are shown to allow efficient tunable frequency shifting of sub-10-fs laser pulses. Soliton self-frequency shift in a photonic-crystal fiber with a core diameter less than 2 μm is used to transform the spectrum of a 6-fs 2-nJ Ti:...

  • Method of frustrated total reflection in spectroscopy of surface polaritons in almost perfectly conducting metals. Genchev, Z. D.; Stoyanov, H. Y. // Applied Physics B: Lasers & Optics;Sep2005, Vol. 81 Issue 5, p657 

    The standard technique for surface polaritons excitation by a prism coupling in Otto configuration is applied for investigation of almost perfectly conducting (pec) metals like tantalum irradiated by a collimated He-Ne laser radiation (λ 0 = 632.8 nm). In pec metals the imaginary part of the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics