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We investigated the effect of residual chromatic dispersion on phase-sensitive amplification of 20Gbaud 16QAM signals experimentally. We observed negligible impacts on amplification although the constellation is degraded in proportion to the amount of CD.
A reflective semiconductor optical amplifier intensity modulator (RSOA-IM) frequency chirp considerably increases the system frequency response of an intensity-modulation and direct-detection (IMDD) PON system over the passband signal spectral region. Adaptive bit and power loading of optical OFDM (OOFDM) enables full use of the RSOA-IM frequency chirp-enhanced passband system frequency response characteristics...
Owing to the lack of strong physical mechanisms capable of elaborately balancing a large number of longitudinal modes created in a self-seeded passive optical network (PON), the resulting coherent-like optical signals are vulnerable to frequency-dependent optical phenomena such as chromatic dispersion (CD). In this paper, based on our recently reported real-time dual-reflective semiconductor optical...
We propose and demonstrate tunable homodyne detection using nonlinear optical signal processing to automatically lock a “local” pump laser to an incoming 20-to-40-Gbaud QPSK data signal. Open eyes are obtained for both in-phase and quadrature components of the signal after ∼200-km transmission over SMF-28 and DCF fibers. The BER performance of the proposed homodyne detection scheme is also compared...
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