High Power Laser Science and Engineering, Volume. 2, Issue 4, 04000e33(2014)
Demonstration of laser pulse amplification by stimulated Brillouin scattering
Fig. 1. Schematic diagram of the experimental setup.
Fig. 2. Experimental frequency spectra of a 1 ps laser pulse recorded after propagation through a supersonic gas jet (normalized intensity versus normalized angular frequency). A reference spectrum, recorded with the gas jet turned off, has been included in each plot. Graph (a) is the spectrum recorded with only the seed beam at an intensity of interacting with the gas jet at , without a counter-propagating pump beam. Graph (b) was recorded with the two counter-propagating beams interacting, the seed at an intensity of and the pump at , at . Graph (c) was recorded with the seed at an intensity of and the pump at , at . The generation of a downshifted peak can be observed through the interaction of the laser pulses and the gas jet, with its relative intensity compared to the fundamental peak strongly depending on the plasma density and the presence of a counter-propagating pump pulse.
Fig. 3. Simulated spectra corresponding to each of the experimental regimes presented in Figure
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E. Guillaume, K. Humphrey, H. Nakamura, R. M. G. M. Trines, R. Heathcote, M. Galimberti, Y. Amano, D. Doria, G. Hicks, E. Higson, S. Kar, G. Sarri, M. Skramic, J. Swain, K. Tang, J. Weston, P. Zak, E. P. Alves, R. A. Fonseca, F. Fiuza, H. Habara, K. A. Tanaka, R. Bingham, M. Borghesi, Z. Najmudin, L. O. Silva, and P. A. Norreys. Demonstration of laser pulse amplification by stimulated Brillouin scattering[J]. High Power Laser Science and Engineering, 2014, 2(4): 04000e33
Category: regular articles
Received: May. 23, 2014
Accepted: Aug. 1, 2014
Published Online: Jan. 13, 2015
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