Fiber optic vacuum feedthroughs are used for making connections
between a vacuum (or pressure) chamber and the outside world. A short
section of fiber is mounted on a port through the wall of the chamber
and is sealed. Fiber optic cables
can then be attached to either side of the feedthrough. This approach
results in higher light losses due to multiple connections, but is more
flexible and less riskprone than the alternative of using a continuous fiber cable with a seal in the middle.
FTO supplies vacuum feedthroughs in two styles: flanged and threaded.