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Ultra-High-Vacuum Fiber Feedthrough CF Flanges


  • CF Flange Fiber Feedthrough for Ultra-High Vacuum
  • SMA Terminated on Both Sides
  • Available for Wavelength Ranges from the UV to Near-IR

VC2H2S

CF Flange for
Ø200 µm SMA Fibers

ADASMAV

Vacuum-Compatible Mating Sleeve

VGC10

Copper Gaskets,
10 Pack

Front

Back

VMH6

Flange Mounting Hardware Pack
(6 Bolts, 6 Nuts, & 12 Washers)

Related Items


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Features

  • Construction Enables use at Vacuum Levels Down to 1 × 10-10 Torr
  • Mates to Ø2.75" (DN40) CF Flanges
  • Bake-Out can be Conducted at Temperatures up to 250 °C
  • Feedthroughs Available with Ø200 µm or Ø600 µm Core Multimode Fiber
  • Low-OH and High-OH Offerings for Different Spectral Ranges
  • Compatible with Thorlabs' Vacuum-Compatible Multimode Fiber Optic Patch Cables
  • Flange Mounting Hardware Pack and Copper Gaskets Sold Below

Thorlabs' Ultra-High-Vacuum-Compatible Ø2.75" (DN40) Fiber Feedthrough CF Flanges allow for optical coupling into Ultra-High-Vacuum (UHV) systems down to 10-10 Torr from the outside environment using SMA905-terminated cables. When using fiber patch cables in a vacuum environment, ensure that the cables are vacuum compatible. Four wavelength ranges from the UV to the Near-IR are available. These fiber feedthroughs incorporate a multimode step index optical fiber, available with either a Ø200 µm or Ø600 µm core, that has a low insertion loss of ≤2.3 dB and can handle optical powers up to 1 W.

Designed for use at UHV pressures, each of Thorlabs' fiber feedthrough CF flange utilizes a hermetically sealed fiber in a stainless steel shell. The CF-style flange utilizes a knife-edge mechanism to create an airtight seal between mating pieces. To create the seal, a copper gasket (sold below) 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. Please note that the copper gasket is not included.

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 CF flanges. 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.

Copper gasket and mounting hardware sets for Ø2.75" CF flanges are also available below. Thorlabs also sells CF flange viewports for Ø1" windows, Ø1.5" flat windows, and Ø1.5” wedged windows as well as an extended line of vacuum-compatible parts.


Posted Comments:
schaefer  (posted 2016-09-02 09:33:33.39)
Can you provide such a UHV feedthrough, but without connectors directly at the flange? Instead I would like to have a fiber going through the flange with something like 20cm fiber with a FC/PC connector on the vacuum side and 2m on the non-vacuum side (FC/PC). As for fibers: FG105LVA or FG050UGA would be of interest to me.
tfrisch  (posted 2016-09-07 01:30:10.0)
Hello, thank you for contacting Thorlabs. We will contact you directly about your application. Acrylate coated fibers will outgas in vacuum, so they should not be used.
andrew.davies.physics  (posted 2016-08-26 11:35:25.4)
You should allow custom fibers to be placed in the feedthrough. For instance I would like to use your FG105LVA fiber. The different core size would cause large coupling losses on both ends.
tfrisch  (posted 2016-09-01 09:30:49.0)
Hello, thank you for contacting Thorlabs. Unfortunately, FG105LVA has an acrylate coating which will outgas in vacuum. I will reach out to you directly.
user  (posted 2014-11-21 10:09:59.43)
Could you make a FC/apc version of this feedthrough?
cdaly  (posted 2014-11-25 01:55:12.0)
Response from Chris at Thorlabs: Yes, we should be able to provide this as a custom for the time being and are looking at introducing it as a standard part as well. Please contact us at techsupport@thorlabs.com if you require a quote for this item.

Ø200 µm Ultra-High-Vacuum Feedthrough

  • Ø2.75" (DN40), Male SMA905 Terminated Fiber Feedthrough CF Flanges
  • Multimode Step Index Optical Fiber with Ø200 µm Core
  • Double-Bagged for Cleanroom Environments

Thorlabs' Ø2.75" (DN40) Fiber Feedthrough CF Flanges are fixed (non-rotating) flanges with male SMA905 fiber connectors on both sides. The fibers are held in place by a glass-ceramic hermetic seal, creating an airtight feedthrough that is suitable for use with chambers operating at pressures down to 10-10 Torr. 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 flange on the vacuum side. These flanges have six 1/4" (M6) through holes for bolting onto any standard DN40 CF flange.

Note: Mounting hardware and CF flange copper gasket seals are not included.

Item # Wavelength Range Fiber Core Diameter Attenuation Range
(Click to Enlarge)
NA Vacuum Level Insertion Loss Max Optical Power Max Temperature
VC2H2S 200 - 1200 nm 200 µm
Ø200 µm Fiber CF Flange Attenuation
0.22 ± 0.02 1 × 10-10 Torr ≤2.3 dB 1 W 250 °C
VC2L2S 400 - 2400 nm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VC2H2S Support Documentation
VC2H2SFiber Feedthrough for Ø2.75" CF Flange, High-OH, Ø200 µm Core, 200 - 1200 nm, SMA
$412.00
Today
VC2L2S Support Documentation
VC2L2SFiber Feedthrough for Ø2.75" CF Flange, Low-OH, Ø200 µm Core, 400 - 2400 nm, SMA
$412.00
5-8 Days

Ø600 µm Ultra-High-Vacuum Fiber Feedthrough

  • Ø2.75" (DN40), Male SMA905 Terminated Fiber Feedthrough CF Flanges
  • Multimode Step Index Optical Fiber with Ø600 µm Core
  • Double-Bagged for Cleanroom Environments

Thorlabs' Ø2.75" (DN40) Fiber Feedthrough CF Flanges are fixed (non-rotating) flanges with male SMA905 fiber connectors on both sides. The fibers are held in place by a glass-ceramic hermetic seal, creating an airtight feedthrough that is suitable for use with chambers operating at pressures down to 10-10 Torr. 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 flange on the vacuum side. These flanges have six 1/4" (M6) through holes for bolting onto any standard DN40 CF flange.

Note: Mounting hardware and CF flange copper gasket seals are not included.

Item # Wavelength Range Fiber Core Diameter Attenuation Range
(Click to Enlarge)
NA Vacuum Level Insertion Loss Max Optical Power Max Temperature
V2H6S 200 - 800 nm 600 µm
Ø600 µm Fiber CF Flange Attenuation
0.22 ± 0.02 1 × 10-10 Torr ≤2.3 dB 1 W 250 °C
V2L6S 400 - 2200 nm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
V2H6S Support Documentation
V2H6SCustomer Inspired! Ø2.73" Fiber Feedthrough CF Flange, Ø600 µm Core, 200 - 800 nm, SMA
$514.01
5-8 Days
V2L6S Support Documentation
V2L6SCustomer Inspired! Ø2.73" Fiber Feedthrough CF Flange, Ø600 µm Core, 400 - 2200 nm, SMA
$514.01
Today

Vacuum-Compatible SMA to SMA Mating Sleeve

Vacuum Compatibility Specifications
Vacuum Compatibility as Packageda 10-10 Torr
Materials 304 Stainless Steel
Preparation and Packaging Chemically Cleaned and Double Vacuum Bagged
Stainless Steel Outgassing Rate at 20 °C 1.8 x 10-8 Torr-Liters/s/cm2
  • Prior to placing any components in a vacuum system, we recommend using an appropriate cleaning procedure, which will be dependent on the application, as well as a pre-baking in a bake-out oven to remove moisture and surface volatiles.
Vacuum SMA Adapter Vent Hole
Click to Enlarge

The ADASMAV has a Ø0.063" (Ø1.6 mm) vent hole.
  • Air-Spaced SMA to SMA Mating Sleeve for Ultra-High-Vacuum Applications
  • Constructed from 304 Stainless Steel
  • <1.5 dB Insertion Loss (Typical Loss for a Pair of Ø200 µm Core Multimode Fibers)
  • Double-Bagged for Cleanroom Environments
  • Compatible with Thorlabs' Vacuum-Compatible Multimode Fiber Optic Patch Cables

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
Our vacuum-compatible adapter is chemically cleaned and prepared for vacuum applications before packaging. It is compatible directly out of the packaging with vacuum environments down to 10-10 Torr. With additional cleaning and processing, it can be used at even lower pressures, only limited by the outgassing rate of the stainless steel (see the table above). The material properties of the stainless steel and the cleaning methods completed by the end user should be used to determine the appropriateness of these products and materials in a specific vacuum system. Please note that using caps or panels not rated for vacuum applications with the ADASMAV is not recommended. 

We also offer other vacuum-compatible components which may be used in vacuum applications. 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
ADASMAV Support Documentation
ADASMAVVacuum-Compatible SMA to SMA Mating Sleeve
$28.95
Today

CF Flange Copper Gaskets and Mounting Hardware

CF Flange Gasket
Click to Enlarge

VGA10 Copper Gasket Installed on VPCHW42-C Viewport
  • VMH6 Stainless Steel (18-8) Mounting Hardware Set Includes:
    • Six Bolts (Silver-Plated, 1/4"-28 x 1.50", 12-Point Heads)
    • Six Nuts and Twelve Washers
  • Single-Use Copper Gaskets for Forming a Seal Between Ø2.75" CF Flanges
    • 101 Copper Alloy (99.99% Pure), OFHC (Oxygen-Free High Conductivity)
    • VGC10: 1/4-Hard Copper Gaskets
    • VGA10: Annealed Copper Gaskets

Thorlabs offers mounting hardware and single-use copper gaskets for mating Ø2.75" CF flanges. These flanges utilize a knife-edge mechanism to create an airtight seal between mating pieces. To create 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.

1/4-hard and annealed copper gaskets are sold in sets of 10. We recommend using the softer annealed copper gaskets with viewports to lower the chance of deformation in the optic due to stress in the flange. The set of stainless steel mounting hardware includes six silver-plated bolts, six nuts, and twelve washers. The silver plating on the bolts acts as a lubricant to prevent galling between the stainless steel surfaces of the bolt and the nut.

Instructions
First ensure the knife-edge mating surfaces of the CF flanges are free from debris or scratches. Then choose the desired bolt hole orientation and insert the gasket, aligning leak-test grooves on the flanges if present. Slide a washer onto the bolt, insert the bolt through the flanges, and add another washer before screwing on the nut. Hand tighten each bolt, then use two wrenches to hold the bolt head and turn the nut. Tighten the nuts gradually in 1/8 to 1/4 turn increments in an alternating crisscross ("star") pattern until the desired tightness is reached. Following these steps will result in a reliable seal with even gasket compression and deformation.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
VMH6 Support Documentation
VMH6NEW!Mounting Hardware for CF Flanges: 6 Silver-Plated Bolts, 6 Nuts, 12 Washers
$17.51
Today
VGC10 Support Documentation
VGC10NEW!1/4-Hard OFHC 99.99% Pure Copper Gaskets for Ø2.75" CF Flange, 10 Pack
$41.20
5-8 Days
VGA10 Support Documentation
VGA10NEW!Annealed OFHC 99.99% Pure Copper Gaskets for Ø2.75" CF Flange, 10 Pack
$92.70
Today
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