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Pmd Measurement: The EXFO Interferometric Method

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Pmd Measurement: The EXFO Interferometric Method

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  • Author: Francis Audet, Normand Cyr
The interferometric method has always been the only accepted and proper method to test PMD in the field. Historically, all PMD instruments based on the interferometric method have been driven by the TIA/IEC standard document FOTP-124, entitled Polarization-Mode Dispersion Measurement for Single-Mode Optical Fibers by Interferometry. Although this standardized technique remains the correct way to test PMD, it is important to remember that it also has its limitations. Other methods do exist, but none are reliable or adequate for testing PMD in the field, where conditions can vary quickly due to vibrations, patchcord movement, gusts of wind, etc. But what if the standard method just got a lot better and a lot more powerful?

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