Patent ID: 6118566
Filing Date: 2000-09-12
Classification: H04B,H04J

Abstract:
An apparatus comprising:an upconverter having a first upconverter input and a second upconverter input, each input being configured to receive first and second electrical data signals, wherein the first electrical data signal on the second upconverter input has a first phase shift from the first electrical data signal on said first upconverter input and the second electrical data signal on the first upconverter input has a second phase shift relative to the second data signal on the second upconverter input opposite to the first phase shift such that said upconverter upconverts the first and second electrical data signals onto corresponding first and second subcarrier frequencies of a lightwave having a carrier frequency and at least one of the corresponding subcarrier frequencies is greater than the carrier frequency and at least one of the corresponding subcarrier frequencies is less than the carrier frequency.