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In this paper, we investigate the performance of the sub-carrier multiplexed-free space optics (SCM-FSO) for transmitting code division multiple access (CDMA) signals in terms of carrier-to-noise-plus-interference ratio (CNIR) and bit error rate (BER), under Gamma-Gamma turbulent FSO channel. We propose an analytical model for optimization of the SCM-FSO link and a closed-form BER expression taking...
All-optical regeneration of DPSK signals using fiber nonlinearity is reported. BER measurements for a two-span system where the regenerator is inserted in between shows that the regenerator is effective in suppressing phase-noise accumulation.
An experiment of DPSK-signal regeneration is reported where the noise reduction is performed in the amplitude domain by a fiber-based amplitude regenerator. Amplitude-noise suppression is demonstrated with phase information maintained.
We propose a bidirectional configuration of self-phase-modulation-based all-optical 2R regenerator using a single nonlinear fiber for wavelength-shift-free operation. We confirm its effectiveness by a recirculating-loop transmission experiment at 80 GHz repetition rate.
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