Patent ID: 6028695
Filing Date: 2000-02-22
Classification: G02F

Abstract:
An optical modulating apparatus comprising: a splitter/combiner structured to split an electric intensity modulation signal inputted into a first input terminal into a first electric signal having an in-phase relationship with that of said intensity modulation signal and also a second electric signal having an inverse phase relationship therewith, split an electric phase modulation signal inputted into a second input terminal into a third electric signal having an in-phase relationship with that of said phase modulation signal and also a fourth electric signal having an in-phase relationship therewith, combine said first electric signal with said fourth electric signal to thereby output a first combined signal, and combine said second electric signal with said third electric signal to thereby output a second combined signal; andan optical modulator structured to splitting a light carrier wave entered from a light source into two light carrier waves, optically phase modulate said two sets of the split light carrier waves by using said first combined signal and said second combined signal derived from said splitter/combiner, and combine the two phase-modulated above said light carrier waves to output an optical modulation signal.