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We investigate the conversion of cross-phase modulation (XPM) to intensity distortion due to dispersion in fibre Bragg grating (FBG) filters. We find that there can be significant XPM-induced intensity distortion, especially near the edges of the filter passband where the in-band dispersion is increasingly pronounced. Since FBG filter dispersion occurs above and beyond that in standard single-mode...
We analyse the relative intensity noise (RIN) induced in a transmitted channel by the out-of-band dispersion from cascaded fibre Bragg gratings used for dropping the adjacent channels. For wavelength-division-multiplexed systems having equal channel spacing, the RIN enhancement is due to the net out-of-band dispersion slope of the cascaded gratings and is considerably more significant than that due...
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