HomeProductsOptomechanicsLab SuppliesFiber Furcation Tubing, Sleeves, and Connector Caps
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Furcation Tubing, Sleeves, and Connector Caps

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Furcation Tubing, Sleeves, and Connector Caps




  • Tubing Protects Fiber and Provides Easy Identification
  • Sleeves Join Stainless Steel Tubing to Connectors
  • Fiber Connector caps Protect Polished faces of Fiber

Features

  • Protect Fiber Optic Cables
  • Colored Tubing for Quick Fiber Type Identification (See Color Choices in Table at Right)
  • Black Furcation Tubing for Light-Sensitive Applications
  • Stainless Steel Tubing Offers High Degree of Protection
  • Sleeves Securely Join Stainless Steel Tubing to Fiber Connectors
  • Connector Caps Keep Polished Fiber Tips Clean

Furcation Tubing
Furcation tubing, also commonly referred to as jacketing, is used to protect delicate fiber optic cables from damage. The color of tubing is typically chosen to represent the type of fiber patch cable. Yellow tubing is the industry standard for single mode fiber, orange designates multimode fiber, and blue is typically reserved for polarization-maintaining fiber. Black tubing prevents visible light from entering through the length of the fiber.

When selecting furcation tubing, please note its inside diameter, as this dimension must be larger than the outside diameter of the fiber you are using. As an alternative to jacketing your own fiber, Thorlabs offers custom pre-made patch cables. Please contact Tech Support for further information about Thorlabs' jacketing capabilities.

Stainless Steel Furcation Tubing and Sleeves
Thorlabs offers two stainless steel options for furcation tubing that provide high rigidity at the expense of a larger bend radius. Additionally, our stainless steel sleeves effectively replace the strain relief boot used with our standard furcation tubing and shield the connection from dust, dirt, and other external contaminants.

Fiber Connector Caps
Dirt on the fiber tip can result in permanent damage to the fiber connector. This can result in increased coupling losses or undesirable mode structure in the output light. To prevent damaging the connectorized fiber, clean the tip before each use and use a fiber connector cap to protect the endface of the connectorized fiber when it is not in use. Thorlabs offers caps for Ø1.25 mm, Ø2.5 mm, and Ø3.2 mm fiber connector ferrules; metal caps for FC and SMA connectors; and caps for FC, SMA, or ST bulkheads and mating sleeves.

Furcation Tubing Selection Guide
Item # Inner Diameter Outer Diameter Color
FT900SM Ø500 µm Ø900 µm Yellow or Bluea
FT020 Ø900 µm Ø2.0 mm Orange
FT030 Ø1.0 mm Ø3.0 mm Orange, Yellow,
Blue, or Black
FT038 Ø1.8 mm Ø3.8 mm Red or Black
FT05SS Ø3.5 mm Ø5.0 mm Silver
(Stainless Steel)
FT061PS Ø3.5 mm Ø6.1 mm Black
(Coated Stainless Steel)

 

Ø900 µm Furcation Tubing

Item #Inner DiameterOuter DiameterColorCompositionOperating Temperature
FT900SM 500 µm 900 µm Yellow Hytrel -40 to 85 °C

Thorlabs' FT900SM Furcation Tubing is Hytrel tubing with a 900 µm outer diameter. Since this furcation tubing has an inner diameter of only 500 µm, it is most commonly used with single mode fiber and may be too small for many multimode fibers. The FT900SM does not have an inner tube or a pull string for feeding fibers through it. Kevlar threads are inside the FT900SM, but these come out when threading a fiber through it. This tubing can be removed by using the AFS900 Adjustable Fiber Buffer and Jacket Stripping Tool.

 

Ø2.0 mm Furcation Tubing

  • Fits up to 900 µm Outer Diameter Fiber
  • Lightweight Alternative to Ø3.0 mm or Ø3.8 mm Tubing
  • Kevlar Protective Threads

 

Our Ø2.0 mm protective tubing provides more protection than Ø900 µm tubing and fits optical fiber up to 900 µm in diameter. It has an internal structure similar to our Ø3.0 mm tubing pictured below, including a PVC outer jacket, Kevlar threads, and a polypropylene inner protective tube. It is ideal for constructing patch cables for optogenetics or any other application where a lightweight, flexible, and durable patch cable is needed. The AFS900 Adjustable Stripping Tool can be used to remove this tubing.

We also offer connector boots and crimp sleeves to use Ø2.0 mm tubing with FC, ST, and SMA connectors (our stock connectors do not include a boot compatible with Ø2.0 mm tubing).

Item #Inner DiameterOuter DiameterColorOperating Temperature
FT020 900 µm 2.0 mm Orange -40 to 70 °C

 

 

Ø3.0 mm & Ø3.8 mm Furcation Tubing

Item #Inner
Diameter
Outer
Diameter
Color
FT030 1.0 mm 3.0 mm Orange
FT030-Y 1.0 mm 3.0 mm Yellow
FT030-BLUE 1.0 mm 3.0 mm Blue
FT030-BK 1.0 mm 3.0 mm Black
FT038 1.8 mm 3.8 mm Red
FT038-BK 1.8 mm 3.8 mm Black

 

Operating Temperature: -20 to 70 °C (-4 to 158 °F)

 

Thorlabs' FT030 and FT038 Furcation Tubings consist of an outer PVC jacket, Kevlar protective threads, a polypropylene inner fiber tube, and a pull string for fiber insertion, as shown in the photo to the right. The Kevlar threads that surround the inner tube protect the fiber from damage by cushioning any impact incurred by the PVC outer jacket. As these threads remain in the jacketing after threading a fiber, these jackets are better suited for protecting fibers than our Ø900 µm tubing.

 

These furcation tubings can be used with SM (yellow standard), PM (blue standard), and MM (orange standard) fibers. Our FT030-BK and FT038-BK Black Furcation Tubing are especially useful for preventing visible room light from entering the patch cable. The tubing can be removed from the fiber by using the FTS3 Stripping Tool and the T865 Kevlar Cutting Shears. Feeding fiber through furcation tubing can be difficult, so the inner tubes of the FT030 and FT038 feature a pull string to help guide the fiber.

 

Ø5.0 mm Stainless Steel Tubing and Sleeves

Item #Inner DiameterOuter DiameterMin. Bend RadiusaMaterialColor
FT05SS 3.5 mm 5.0 ± 0.2 mm 19 mm SUS304 Silver

 

Operating Temperature: -60 to 527 °C (-76 to 981 °F). Note: The temperature range is specified for straight, unflexed, static tubing.

 

  • Minimum Bend Radius of the empty tubing. Be sure to check the bend radius of any fiber inside the tubing prior to use.

 Thorlabs' FT05SS Stainless Steel Tubing and FTS50x Sleeves provide a high degree of fiber protection. The FT05SS is the same tubing used in our SMA Fiber Bundles. Its all-metal jacket prevents visible and IR light from entering through the length of the patch cable. The FTS50x sleeves effectively replace the strain relief boot used with our standard furcation tubing and shield the connection from dust, dirt, and other external contaminants. Please refer to the Compatibility Guide table below to ensure the proper match between the fiber connector and sleeve.

 To create a fiber connection, our F112 or F123 Epoxy is used to secure the sleeve along the same central axis as the fiber connector, tubing, and bare fiber. Each sleeve is engraved with an A, B, or D that corresponds to the suffix of the part number and indicates the inner diameter of the connector side of the sleeve. When the fiber connector and tubing are fed into the sleeve, they each encounter a hard stop once they are completely inserted, making it easy to create reliable connections.

 The bare fiber can be fed directly into the tubing, which does not contain an inner tube, Kevlar threads, or a pull string. If desired, the fiber can be fed into our FT030 tubing (which does feature a pull string) before being put into the stainless steel tubing for added convenience and protection.

 

Ø6.1 mm Stainless Steel Tubing and Sleeves

Item #Inner DiameterOuter DiameterMin. Bend RadiusaColor
FT061PS 3.5 mm 6.1 mm 19 mm Black

 

Operating Temperature: -50 to 60 °C (-58 to 140 °F)

 

  • Minimum Bend Radius of the empty tubing. Be sure to check the bend radius of any fiber inside the tubing prior to use.

 

Thorlabs' FT061PS Stainless Steel Tubing and FTS61x Sleeves provide a high degree of fiber protection. The FT061PS has a black plastic coating (olefin elastomer) that is lead-free, halogen-free, and provides chemical, water, and heat resistance. The black coating and all-metal jacket prevent visible and IR light from entering through the length of the patch cable. The FTS61x sleeves effectively replace the strain relief boot used with our standard furcation tubing and shield the connection from dust, dirt, and other external contaminants. Please refer to the Compatibility Guide table below to ensure the proper match between the fiber connector and sleeve.

 To create a fiber connection, our F112 or F123 Epoxy is used to secure the sleeve along the same central axis as the fiber connector, tubing, and bare fiber. Each sleeve is engraved with an A, B, or D that corresponds to the suffix of the part number and indicates the inner diameter of the connector side of the sleeve. When the fiber connector and tubing are fed into the sleeve, they each encounter a hard stop once they are completely inserted, making it easy to create reliable connections.

 The bare fiber can be fed directly into the tubing, which does not contain an inner tube, Kevlar threads, or a pull string. If desired, the fiber can be fed into our FT030 tubing (which does feature a pull string) before being put into the stainless steel tubing for added convenience and protection.

 

Fiber Optic Connector Caps

  • Cap Protects End Face of Fiber
  • Options Available for LC, FC, ST, SC, and SMA Connectors
  • Plastic, Nickel-Plated Brass, and Rubber Versions Available
Item #Ferrule SizeCompatible Connector TypesMaterialColorNumber of Caps per Pack
CAPL Ø1.25 mm LC Plastic White 25
CAPF Ø2.5 mm FC, ST, SC Plastic Clear 25
CAPFM  - FC (Narrow Key) Nickel-Plated Brass - 4
CAPM Ø3.2 mm SMA Rubber Black 10
CAPMM - SMA Nickel-Plated Brass - 4

 

Bulkhead and Mating Sleeve Caps

  • Caps Protect Bulkheads and Mating Sleeves
  • CAPF1: Metal Cap and Chain for FC/PC and FC/APC Mating Sleeves
  • CAPN1: Metal Cap and Chain for SMA Mating Sleeves
  • CAPT1: Metal Cap and Chain for ST Mating Sleeves

ABOUT US

Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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