Frequency Shift Induced in Laser Pulses by Plasma Density Variations
NAVAL RESEARCH LAB WASHINGTON DC
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An analytical theory is developed which describes how a radiation pulses becomes modified as it propagates through a plasma with arbitrary temporal and spatial density variations. Expressions are derived for the shifts induced in both the frequency and the wavenumber of the radiation pulse. It is shown that temporal variations in the plasma density result in frequency shifts of the radiation. the possibility of up shifting the frequency of the laser pulse using plasma waves in analyzed, and it is found that maximum shifts occur when the phase velocity of the plasma wave is equal to the group velocity of the laser pulse. Keywords Laser plasma interactions Frequency shifts Plasma variations.
- Lasers and Masers
- Plasma Physics and Magnetohydrodynamics