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A simple BPSK regenerator is demon strated, where the input signal is coherently demodulated and the noise is suppressed in the re-modulation process by a Mach-Zehnder modulator. Performances of regen eration schemes using coherent and differential demodulation are compared.
Fiber-based all-optical signal regeneration techniques are reviewed. In the first half of the paper, amplitude regeneration schemes for ON–OFF keying signals using self-phase modulation and four-wave mixing in fibers are classified and their features are described. In the second half of the paper, focus is placed on regeneration schemes of phase-encoded signals. In particular, we discuss the performance...
Simultaneous noise suppression of time-interleaved three-wavelength optical signals using saturation of four-wave mixing in a fiber is reported. Nonlinear phase noise reduction of three-wavelength DPSK signals is demonstrated using the phase-preserving amplitude equalization.
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