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We report on the effects of intraband crosstalk in the system using spectrum-sliced light sources. The results show that the spectrum-sliced light sources are much less sensitive to intraband crosstalk compared to laser sources. This is mainly because the spectrum-sliced light source should have relatively broad optical bandwidth to obtain the signal-to-noise ratio required for the acceptable bit-error-rate performance. Thus, in the system using spectrum-sliced light sources, the signal-crosstalk beat noise is reduced significantly as the beat components become spread outside of the receiver's bandwidth.