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Pre-distortion using optical phase control by optical power monitoring is proposed to mitigate waveform degradation from SPM in dispersion-compensated fiber transmissions with BPSK-SSB modulation. The numerical evaluation confirmed that the pre-distortion can increase the fiber input power 15 dB compared to the no-equalization case.
Tolerance to SPM is evaluated in a dispersion-compensated transmission using optical BPSK singlesideband modulation. Optical BPSK-SSB with a pilot carrier is more tolerant to fiber nonlinearity than the conventional BPSK-SSB transmission.
Novel post-equalizations for SPM are proposed in a dispersion-compensated fiber transmission with optical BPSK single sideband modulation. The equalization can increase the fiber input power 18 dB over that of the no equalization case.
Optically phase-shifted SSB modulation is demonstrated using the third-order optical Hilbert transformer of Mach-Zehnder interferometers. The results verify the principle of the optically phase-shifted SSB scheme which is applicable for high-speed transmission with bandwidth efficiency.
It is confirmed that the multiplexer and the semiconductor laser can be operated up to 4 Gbit/s with pseudorandom pulse pattern. The relaxation oscillation, pattern effect and tailing effect of the semiconductor laser are also studied. It is confirmed that eye degradation is predominantly due to fluctuation of initial time delay caused by pattern effect, and tailing effect and relaxation oscillation...
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