Patent ID: 7228073

Claim:
An optical signal transmission device for transmitting phase information of optical signals comprising: a multiplexing formatted optical signal generator arranged to generate multiplexing formatted optical signals; and an optical phase generator arranged to receive the multiplexing formatted optical signals, wherein the multiplexing formatted optical signal generator comprises an optical time division multiplexing (OTDM) carrier suppressed—return to zero (CS-RZ) signal generator arranged to generate OTDM-CS-RZ signals comprising signal light, and wherein the optical phase generator comprises an optical phase conjugator arranged to receive the OTDM-CS-RZ signals from the OTDM CS-RZ signal generator, wherein said optical phase conjugator comprises: a continuous wave (CW) pump light source that emits pump light; a pump light amplifier arranged to amplify the pump light emitted by the CW pump light source; a first phase conjugator arranged to arrange the phase of the signal light; a signal light amplifier arranged to amplify the signal light; a second phase conjugator arranged to arrange the phase of the signal light; an optical coupler arranged to couple the signal light and the pump light from the first phase conjugator and the second phase conjugator and emit the coupled light; a first and a second semiconductor amplifier (SOA) arranged to amplify the coupled light and provide phase conjugated light; and a light filter arranged to filter the phase conjugated light from the second SOA.