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Ultra-High Vacuum Fiber Feedthrough ConFlats
CF Flange for SMA Fibers
Vacuum-Compatible Mating Sleeve
Thorlabs' ultra-high-vacuum-compatible Ø2.75" (DN40) fiber feedthrough ConFlats (CF) allow the user to couple light into a vacuum chamber from the outside environment using SMA905-terminated cables (when using fiber patch cables in a vacuum environment, ensure that the cables are vacuum compatible). They are available with a transmission range of either 200 - 800 nm (V2H6S) or 400 - 2200 nm (V2L6S). These fiber feedthroughs incorporate a multimode step index optical fiber with a Ø600 µm core, have an insertion loss of ≤2.3 dB (see Graphs tab), and can handle optical powers up to 1 W.
Designed for use at ultra high vacuum (UHV) pressures, Thorlabs' fiber feedthrough CF utilizes a hermetically sealed fiber in a stainless steel shell. The ConFlat design, which requires a copper gasket seal, is compatible for use on chambers operating at vacuum levels down to 10-10 Torr. The fiber feedthrough features a male SMA905 connector on both ends; mating sleeves may be used to connect fiber patch cables to the feedthrough.
Thorlabs offers the ADASMAV for mating vacuum-compatible patch cables inside a vacuum environment, such as mating to the UHV fiber feedthrough conflat. This mating sleeve is a vacuum-compatible version of the ADASMA SMA to SMA Mating Sleeve. Constructed using 304 stainless steel, this adapter is designed to be used within ultra-high vacuum systems (>10-10 Torr) and features a Ø0.063" (Ø1.6 mm) hole through the body to serve as a vent, allowing trapped gas to escape.
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This graph shows the attenuation vs. wavelength for the V2H6S UHV fiber feedthrough ConFlat.
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This graph shows the attenuation vs. wavelength for the V2L6S UHV fiber feedthrough ConFlat.
Thorlabs Ø2.75" Fiber Feedthrough ConFlats (CF) allow for optical coupling into Ultra High Vacuum (UHV) systems down to 10-10 Torr. These are fixed (non-rotating) flanges with male SMA905 fiber connectors on both sides. Mating sleeves may be used to connect fiber patch cables to the feedthrough; we recommend the ADASMAV (sold below) when mating a patch cable to the CF on the vacuum side. These flanges have six 1/4" (M6) through holes for bolting onto any standard Ø2.75" CF flange. Please note that mounting hardware is not included. The feedthrough has an insertion loss of ≤2.3 dB and can handle up to 1 W of power. A glass-ceramic seal holds the hermetically-sealed fiber in place and forms the leak-tight seal.
The CF style flange utilizes a knife-edge mechanism to create an airtight seal between mating pieces. To accomplish the seal, a copper gasket is most often employed. As the bolts of the mating pair are tightened, the knife edge “bites” into the copper gasket, deforming it. The extruded metal fills all the machining marks and surface defects, which yields a leak-tight seal.
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The ADASMAV has a Ø0.063" (Ø1.6 mm) vent hole.
Thorlabs' ADASMAV Mating Sleeve is a vacuum-compatible version of the ADASMA SMA to SMA Mating Sleeve. Constructed using 304 stainless steel, this adapter is designed to be used within ultra-high vacuum systems (>10-10 Torr) and features a Ø0.063" (Ø1.6 mm) vent hole in the side to allow trapped gases to escape (see image to the right). Unlike the standard version, the ADASMAV is only compatible with SMA905-style connectors. A 304 stainless steel washer and nut are included for custom mounting.
Additional Vacuum-Compatible Components
Many of our patch cables can be special ordered for vacuum use. Contact Tech Support for details.
Vacuum Compatibility Information
We also offer other vacuum-compatible components which may be used in vacuum applications.