Back to results
US 4,847,521 AGranted
Device for the amplification of light-sensitive
AssigneeThomson-CSF
InventorsJean-Pierre Huignard, Brigitte Loiseaux, Gauthier H. de Monchenault, Claude Puech
Life of this patent
Estimating the term…
Abstract
A device for the amplification of optical signals comprises a light-sensitive medium receiving a modulated signal optic wave and a pump wave, in which the response time of the light-sensitive medium is substantially greater than the mean period for the modulation of the signal wave. The device can be applied to optical transmission in telecommunications.
Claims5
A device for the amplification of light-sensitive medium optic signals, said device comprising:
- a medium with light-induced variations in indices;
- a first source emitting a signal optic wave towards said light-sensitive medium;
- a second source emitting a pump optic wave directly at said light-sensitive medium;
- with the signal optic wave and the pumping optic wave interfering in the light-sensitive medium;
- wherein the signal optical wave is modulated at high frequency and has a defined wavelength, the pumping optical wave has a very slightly different wavelength and the response time of the said medium at recording and erasure has a value which is greater than the mean modulation period of the signal wave.
2 more elements
Dependencies are inferred from the claim text.