Transmission cross sections of optical-fiber feedthroughs for suppression of electromagnetic interference

Various optical-fiber, bulkhead adapter feedthroughs were tested over a range from 1 GHz to 16 GHz to determine how much they degraded the shielding effectiveness of electronic enclosures. We report transmission cross sections for the feedthroughs which range from 10/sup -10/ m/sup 2/ to 10/sup -2/ m/sup 2/. These can be used to calculate the shielding effectiveness for various enclosures of interest.