Method and apparatus for upshifting light frequency by rapid pla

Amplifiers – Parametric amplifiers – Semiconductor type

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350353, H01S 300, H03F 700

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049756559

ABSTRACT:
Photons of an electromagnetic source wave are frequency-upshifted as a plasma is rapidly created around the path of this propagating source wave. The final frequency can be controlled by adjusting the gas density. A controlled time-varying frequency (chirped) pulse can be produced by using a controlled spatially varying gas density. The plasma must be created in a time which is short compared to the transit time of the light through the plasmas region. For very fast creation over one to at most a few light periods of an overdense plasma, static magnetic fields with short wavelengths are created.

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