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The Effects and Performance Analysis of Non-linear Phase Noise in All Optical OFDM Systems (Paperback)
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The Effects and Performance Analysis of Non-linear Phase Noise in All Optical OFDM Systems (Paperback)
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Due to the limitation of the electrical OFDM signal and electrical
Fast Fourier Transform (FFT), all-optical OFDMs have recently
received much attention. Accordingly, this research study was
conducted to investigate the effect of phase noise in the
performance of an all-optical OFDM transmission system with 4-point
FFT single mode fiber (SMF) links by considering the effects of
fiber length, input laser power and a number of channels. In all
optical systems, the transmitter side consists of a comb power
generator, wavelength selected switch and an optical QAM generator.
A comb power generator generates channels with a frequency
separation of f=25 GHz. Subsequently, a Wavelength Selected Switch
(WSS) was used to split subcarriers and then the subcarriers were
modulated individually with Optical QAM modulators. As the results
show, a higher number of channels led more phase noise in terms of
XPM and FWM nonlinearities, and signal power was the main factor in
nonlinear fiber optics. As a consequence, there is more phase noise
distortion at a higher signal power for a higher number of channels
rather than the lower number of channels.
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