All-optical phase-modulated data signal regeneration

摘要

All-optical phase-modulated data signal regenerator apparatus (10) comprising an optical input (12), an optical signal converter (16), an optical carrier signal source (18), optical signal forming apparatus (20) and an optical output (14). The input (12) is arranged to receive a phase-modulated optical data signal. The signal converter (16) is arranged to receive the data signal and to convert phase modulation of the data signal into a corresponding intensity modulation of an intermediate optical signal. The carrier signal source (18) provides an optical carrier signal. The signal forming apparatus (20) is arranged to receive the carrier signal and the intermediate optical signal, and comprises a first element arranged to receive the intermediate optical signal and to apply a transfer function for effecting reshaping and resizing, and a second element for effecting transfer of an intensity modulation of the intermediate optical signal into a phase modulation on the optical carrier signal to form a regenerated phase-modulated optical data signal. The output (14) is arranged to output the regenerated optical data signal.

主权项

1. All-optical phase-modulated data signal regenerator apparatus comprising:
an optical input arranged to receive a phase-modulated optical data signal; an optical signal converter arranged to receive said phase-modulated optical data signal and to convert phase modulation of said phase-modulated optical data signal into a sum intermediate optical signal and a difference intermediate optical signal an optical carrier signal source arranged to provide first and second optical carrier signals; optical signal forming apparatus arranged to receive said first and second optical carrier signals and said first and second intermediate optical signals, the optical signal forming apparatus comprising:
a first resizing reshaping regenerator arranged to receive said sum intermediate optical signal and arranged to apply a transfer function for effecting reshaping and resizing said sum intermediate optical signal,a second resizing reshaping regenerator arranged to receive said difference intermediate optical signal and arranged to apply a transfer function for effecting reshaping and resizing said difference intermediate optical signal,a first non-linear optical element arranged to receive said first optical carrier signal and said sum intermediate optical signal from said first resizing reshaping regenerator for effecting transfer of an intensity modulation of said sum intermediate optical signal into a phase modulation on said first optical carrier signal to thereby form a first regenerated phase-modulated optical data signal,a second non-linear optical element arranged to receive said second optical carrier signal and said difference intermediate optical signal from said second resizing reshaping regenerator for effecting transfer of an intensity modulation on said second optical carrier signal to thereby form a second regenerated phase-modulated optical data signal, andan optical signal combiner arranged to receive and combine said first and second regenerated phase-modulated optical data signals; and an optical output arranged to output a combined regenerated phase-modulated optical data signal from the optical signal combiner.