OTDR Series e-Manual, D07-00-076P-RevC00 Page 29 of 107
6.1 Contamination
Optical connectors are susceptible to contamination from air borne particles and human body
oils when exposed. Left over liquid residue from improper cleaning can also leave the fiber end
face contaminated. The smaller the fiber core, the more severe the problem is likely to be,
especially when you consider that fiber core diameters can range from 62.5 microns all the
way down to 8 microns in size. Below are some examples viewed by a 400x Fiber microscope:
6.2 Inspection
Whenever possible, inspect the fiber-optic connection (connectors, bulkheads, and test
interfaces) with a fiber microscope. It is recommended to wear laser safety glasses when you
work with fiber-optic connections, and always check that you disconnect the laser or
transmitter before you begin cleaning the connector end faces.
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