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US 3,937,979 AGranted
Photoparametric amplifying upconverter
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsMichael K. Giles, Walter E. Freitag
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Abstract
A low frequency photoparametric amplifying upconverter comprising an indium ntimonide or silicon photodiode, source of pumping voltage and clamping device to clamp the diode in a self biased condition, all functioning to amplify an input signal applied to the photodiode.
Claims3
A low frequency photoparametric amplifying upconverter comprising:
- pump means for providing a pumping voltage of a frequency of approximately one megahertz;
- an output load;
- photodiode means operatively connected in series with said pump means and said load means;
- clamping means comprising an isolating capacitor also connected in series with said pump means and said photodiode means for clamping the photodiode means in a reverse bias condition and for blocking the input signal;
- said photodiode being pumped so that it operates as a photoparametric amplifying upconverter;
- the input signal for the photoparametric amplifying upconverter comprising the junction current generated by illuminating the photodiode means.
3 more elements
Dependencies are inferred from the claim text.