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The Need for Testing Low PMD Values in DWDM Components

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The Need for Testing Low PMD Values in DWDM Components

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  • Author: Alain Pham
The continuous increase in both data-rate-per-channel and wavelength channel count serves only one purpose: to fulfill the telecommunications industry’s hunger for optical bandwidth. However, the total number of wavelength-division-multiplexed (WDM) channels that can be accommodated in a system depends on many factors, ranging from cost and component-wavelength selectivity to loss and dispersion budgets, as well as non-linear effects. Among these, polarization mode dispersion (PMD) is particularly troublesome for high data-transmission speed, mostly because of its random nature.

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