Optical: systems and elements – Optical frequency converter
Patent
1997-03-28
2000-03-28
Lee, John D.
Optical: systems and elements
Optical frequency converter
333167, 333218, 385 1, 385 27, G02F 135, H01P 100
Patent
active
060439262
ABSTRACT:
The broadband microwave frequency shifter is an electro-optical device that accomplishes frequency shifting, or translation by the use of serrodyning or mixing techniques. A first optical signal is modulated with the radio frequency signal desired to be translated and processed to produce an upconverted lower sideband optical signal. A second optical signal is frequency shifted using an optical phase shifter utilizing serrodyning techniques or by offset phase locking it to another optical signal. When the frequency shifted optical signal is combined with the upconverted optical signal and converted to an output radio frequency signal thereby producing an output microwave signal that duplicates the input microwave signal in all aspects except that its center frequency has been shifted.
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Lee John D.
McDonnell Thomas E.
Stockstill Charles J.
The United States of America as represented by the Secretary of
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