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What happens if there are dust particles on one of the connector end faces during the connector mating process?



Mating connectors with dust will embed the debris into the ferrule end face causing permanent scratches and pits. The way to calculate contact pressure (P) is to divide the normal force divided by the surface area or simply P=F/A.

If we assume a connector has mating force of 3kg (6.6 lbs) and that the contact area of the two mated connectors is 200µm (0.00787 inches), the contact force between of the mated connector pair in the contact zone is 147N/m2 (21 psi). This is enough pressure between the two mated ferrules to embed the dust particles into the ferrule end faces creating scratches and pit marks in the glass of the fibre as well as on the surfaces of the zirconia ceramic of a single fiber ferrule and polymer composite materials used for MT ferrules. Scratches and pits located in the contact will have a negative impact of the signal performance and spike the inspection losses and disrupt back reflectance for angles polished connectors.


  Answered by AskFOC Technical Team WITH the Sticklers MicroCare Corporation Team July 18, 2017


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Kathleen Skelton

About Kathleen Skelton

Kathleen Skelton, Director of Strategic Marketing's experience includes management positions at Lightwave, KMI Research, PennWell Publishing, Beacon Communications, and Security Innovations, Inc. As a strategic marketing director, she utilizes her expertise in business development, online strategy, marketing planning, digital best practices, standard operating procedures development, and database design, management and training. Kathleen has global business and marketing experience. Outside of FOC, Kathleen is passionate about her volunteer work for several organizations and works with youth groups teaching business strategy for various community projects. In her volunteer work, Kathleen is committed to developing tomorrow's leaders through exciting, strategy-focused business education. This mission guides all of her work outside of the corporate office. Kathleen graduated from Curry College with a BA in Communications and Education and minors in English and Psychology. Kathleen resides outside of Boston, MA with her husband and four children. Follow @KATHLEENSKELTON