Observation of stimulated Brillouin backscatter saturation in an underdense plasma for long CO2 laser pulses

1979 ◽  
Vol 35 (9) ◽  
pp. 681-683 ◽  
Author(s):  
Z. A. Pietrzyk ◽  
T. N. Carlstrom
Keyword(s):  
Co2 Laser ◽  
Laser Pulses ◽  
Stimulated Brillouin ◽  
Underdense Plasma

scholarly journals Demonstration of laser pulse amplification by stimulated Brillouin scattering

2014 ◽  
Vol 2 ◽  
Author(s):  
E. Guillaume ◽  
K. Humphrey ◽  
H. Nakamura ◽  
R. M. G. M. Trines ◽  
R. Heathcote ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Plasma Density ◽  
Brillouin Scattering ◽  
Laser System ◽  
Laser Pulses ◽  
Seed Pulse ◽  
Central Wavelength ◽  
Demonstration Experiment ◽  
Stimulated Brillouin ◽  
Underdense Plasma

Abstract The energy transfer by stimulated Brillouin backscatter from a long pump pulse (15 ps) to a short seed pulse (1 ps) has been investigated in a proof-of-principle demonstration experiment. The two pulses were both amplified in different beamlines of a Nd:glass laser system, had a central wavelength of 1054 nm and a spectral bandwidth of 2 nm, and crossed each other in an underdense plasma in a counter-propagating geometry, off-set by $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}10^\circ $ . It is shown that the energy transfer and the wavelength of the generated Brillouin peak depend on the plasma density, the intensity of the laser pulses, and the competition between two-plasmon decay and stimulated Raman scatter instabilities. The highest obtained energy transfer from pump to probe pulse is 2.5%, at a plasma density of $0.17 n_{cr}$ , and this energy transfer increases significantly with plasma density. Therefore, our results suggest that much higher efficiencies can be obtained when higher densities (above $0.25 n_{cr}$ ) are used.

Stimulated Brillouin scattering of CO2 laser radiation from underdense plasma

1976 ◽  
Vol 47 (4) ◽  
pp. 1451-1458 ◽  
Author(s):  
A. A. Offenberger ◽  
M. R. Cervenan ◽  
A. M. Yam ◽  
A. W. Pasternak
Keyword(s):  
Laser Radiation ◽  
Co2 Laser ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Co2 Laser Radiation ◽  
Stimulated Brillouin ◽  
Underdense Plasma

scholarly journals Unique characteristics of long-period fibre gratings fabricated by high-freque ncy CO2 laser pulses

2003 ◽  
Vol 52 (6) ◽  
pp. 1432
Author(s):  
Wang Yi-Ping ◽  
Rao Yun-Jiang ◽  
Ran Zeng-Ling ◽  
Zhu Tao
Keyword(s):  
Co2 Laser ◽  
Laser Pulses ◽  
Long Period
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