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Chapter 9.3 - Nonlinear Crosstalk

By Govind P. Agrawal
From Lightwave Technology

9.3 Nonlinear Crosstalk

Several nonlinear effects in optical fibers [39] lead to interchannel crosstalk and affect the performance of WDM systems considerably [40]-[44]. Among the nonlinear phenomena discussed in Chapter 4, the three most relevant for WDM systems are stimulated Raman scattering (SRS), four-wave mixing (FWM), and cross-phase modulation (XPM). This section focuses on SRS and FWM phenomena. The impact of XPM on WDM systems is discussed in the following section.

© 2005 John Wiley & Sons, Inc.

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Topics of Interest
9.3.1 Raman Crosstalk As discussed in Section 4.4, SRS is generally not of concern for single-channel systems because of its relatively high threshold (about 500 mW near 1.55 µm). The situation... (Read More)
9.4 Cross-Phase Modulation Both SPM and XPM affect the performance of WDM systems. The effects of SPM have been discussed in Sections 4.6 and 8.1 because, by definition, SPM represents an intrachannel... (Read More)
9.5 Control of Nonlinear Effects Among the three nonlinear effects that create interchannel crosstalk and limit the performance of WDM systems, FWM and XPM constitute the dominant sources of power... (Read More)
Problems 9.1  Dry fibers have acceptable losses over a spectral region extending from 1.3 to 1.6 µm. Estimate the capacity of a WDM system covering this entire region using 40-Gb/s channels... (Read More)
9.3.2 Four-Wave Mixing FWM is considered the most dominant source of crosstalk in WDM systems, and its impact has been studied extensively [58]-[69]. As discussed in Section 4.3, FWM requires phase... (Read More)