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Increased Nonlinear Crosstalk in Analog Wavelength-Division-Multiplexed Links Due to the Chromatic Dispersion of Optical Filters

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2 Author(s)
Campillo, A.L. ; Naval Res. Lab., Washington, DC ; Bucholtz, F.

The effect of the chromatic dispersion of an interference filter on the nonlinear crosstalk in a wavelength-division-multiplexed microwave photonic system is investigated. For a simple two-channel pump-probe system with 200-GHz channel spacing, a crosstalk variation of greater than 30 dB is observed as the wavelength of the probe is varied across the flat-top region of the filter. The crosstalk is correlated with the dispersion of the filter and a variation of less than 7% of the filter width is observed to increase the crosstalk by 10 dB. An analytical model for calculating the crosstalk is presented

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 19 )