Patent ID: 6262834
Filing Date: 2001-07-17
Classification: G02F

Abstract:
A wideband single-sideband modulator comprising:a polarized light source applied to an optical system for receiving and transmitting said polarized light;means for splitting said polarized light transmitted by the optical system into a first and second counterpropagating optical light wave in a Sagnac loop;an electromagnetic signal to modulate the counterpropagating optical light signals;means for intensity modulating said first optical light to produce an intensity modulated optical light with the electromagnetic signal;means for shifting the phase of the electromagnetic signal 90.degree.;means for phase modulating said second optical light with the electromagnetic signal 90.degree. out of phase so as to produce an optical signal whose phase modulation is 90.degree. out of phase with the intensity modulation of the other optical signal; andmeans for combining the phase modulated optical signal 180.degree. out of phase with the intensity modulated signal to produce a optical signal with a suppressed carrier.