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.

Flanged feedthroughs make multiple (up to four) fiber connections possible.
Flanges come in two styles: for ultra high vacuum (UHV) applications, a CF (1-1/3” CF or 2-3/4” CF) flange design is recommended. For high vacuum (HV) situations, bolted ISO (NW16 KF or NW40 KF) flanges work best.

Threaded feedthroughs are designed for single fibers and use either NPT (1/4" or 3/8") or standard bolt (3/8-24 or 1/2-20) threads.

Specifications

Applications:

• optical coating production control
• environmental testing
• semiconductor processing
• bio-reactor monitoring