Fiber Optic Probes and Cables

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

Fiber optic probe configuration

Probe orientation

Polish type