Patent ID: 6842125

Claim:
A method for converting a unipolar voltage data stream into a carrier-suppressed return-to-zero (CSRZ) optical data stream, the method comprising the steps of: supplying a coherent continuos optical wave; supplying a nonreturn-to-zero (NRZ) voltage unipolar data stream; formatting the nonreturn-to-zero (NRZ) voltage unipolar data steam into an encoded non-return-to-zero (NRZ) voltage data stream; and modulating the continuous optical wave with the encoded nonreturn-to-zero (NRZ) voltage data stream for providing a CSRZ optical data stream of full-width at half-maximum (FWHM) pulse width less than one-half of the transition time of the encoded nonreturn-to-zero (NRZ) voltage data se between logical states for a reduced pulse-width.