| Feedthrough |
Purpose |
Detailed description |
| SMA |
General purpose/low cost |
SMA 905/906 with flat end (<-11 dB return loss connected); hermetic feedthrough has air gap transition from external customer fiber to internal probe fiber |
| FC |
High performance/low optical loss |
NTT-FC with super PC polish (-40 dB return loss connected); hermetic feedthrough is matched to the fiber type for transition from external customer fiber to internal probe fiber |
| Penetrating |
Integrated fiber and feedthrough to maintain polarization |
Fiber is epoxy sealed to the feedthrough and is continuous through the vacuum chamber to maintain polarization; fiber extends 0.4 m from top of probe arm base with FC style connector on the user end |