Method and apparatus for optical modulating a light signal
Abstract
Abstract THIS DISCLOSURE DESCRIBES A METHOD AND APPARATUS FOR OPTICALLY MODULATING A LIGHT OR MICROWAVE BEAM. THE METHOD COMPRISES THE STEPS OF: GENERATING A SIGNAL CARRIER LIGHT BEAM, DIRECTIG SAID SIGNAL CARRIER LIGHT BEAM TO A FREE CARRIER SOURCE THAT IS NORMALLY TRANSPARENT TO SAID SIGNAL CARRIER BEAR, GENERATING A MODULATING LIGHT BEAM, AND DIRECTING THE SAID MODULATING LIGHT BEAM TO SAID FREE CARRIER SOURCE. THE MODULATING LIGHT BEAM VARIES THE TRANSMISSION CHARACTERISTICS (TRANSPARENCY) OF THE FREE CARRIER SOURCE, THEREBY MODULATING THE PASSAGE OF THE SIGNAL CARRIER LIGHT BEAM. THE APPARATUS OF THE INVENTION COMPRISES A SIGNAL CARRIER LIGHT BEAM SOURCE, A MODULATING LIGHT BEAM SOURCE AND A SEMICONDUCTOR FREE CARRIER SOURCE. LIGHT BEAMS FROM THE SIGNAL CARRIER LIGHT BEAM SOURCE AND FROM THE MODULATING LIGHT BEAM SOURCE ARE DIRECTED ONTO THE SEMICONDUCTOR FREE CARRIER SOURCE. THE LIGHT FROM THE MODULATING LIGHT BEAM SOURCE VARIES THE TRANSMISSION CHARACTERISTICS (TRANSPARENCY) OF THE SEMICONDUCTOR FREE CARRIER SOURCE TO THE LIGHT BEAM FROM THE SIGNAL CARRIER LIGHT SOURCE, THEREBY MODULATING THE SIGNAL CARRIER LIGHT BEAM. THE TRANSMISSION CHARACTERISTICS OF THE SEMICONDUCTOR FREE CARRIER SOURCE ARE VARIED BY THE CREATING OF FREE CARRIERS IN IT. THE FREE CARRIERS ARE CREATED BY THE MODULATING LIGHT BEAM.
Inventors
- 👤 Carl L Gruber
- 👤 William E Richards
Bibliographic Details
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