Pulse compressor with saturation-matched focusing geometry

Details Pulse compressor with saturation-matched focusing geometry Pulse compressor with saturation-matched focusing geometry

1979-08-27

1981-12-15

Nelms, David C.

Amplifiers

Parametric amplifiers

307426, H03F 700

Patent

active

043061958

ABSTRACT:
A backward-wave Raman amplifier or pulse compressor for compressing laser pulses. A laser pulse, or pump beam, of relatively long duration enters one end of the compressor. A short, initiating Stokes-Raman pulse enters the other end of the compressor and absorbs energy from the pump beam as the Stokes-Raman pulse traverses the compressor. The cross-sectional area of the Stokes-Raman pulse within the compressor increases linearly with distance traversed through the compressor so that the energy density within the pulse remains substantially constant as the pulse traverses the compressor and receives energy from the pump beam which traverses the compressor in the opposite direction. The cross section of the pump beam also varies linearly with distance within the compressor so as to coincide substantially with the cross section of the Stokes-Raman pulse and thus achieve efficient compression.

REFERENCES:
patent: 3515897 (1970-06-01), Culver

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