Filled Tubing Fiber Optic

Fiber Optic Filled Tubing

K-Tube developed and introduced laser-welded fiber optic tubing to the industry almost 30 years ago. The tubing was designed to enable the use of optical fibers in harsh environments such as underwater, underground, down hole, aerial and space applications. It offered protection from hydrostatic pressure, hydrogen effects, corrosion, and other natural elements.

Today, K-Tube’s dedicated technical team is actively growing and supporting fiber optic cable markets ranging from land to underwater communications and the oil and gas industry.

Optical Fibers

K- Tube maintains excellent relationships with most optical fiber manufacturers and stays informed of new developments in all types of single mode, multimode, and high and low temperature optical fibers.

Laser Welded Tubing

We understand how important it is to have strong, seamless protection of the optical fibers. Talk with a member of our team to determine the best tube material, size, and filling compounds for your project.

  • Tube material: The surrounding tube material is selected to suit your application and can include nickel chromium alloys, stainless steel, Inconel, titanium, and more.
  • Tube size: The tube size can vary from 1 to 6 mm in diameter and can accommodate 1 to 48 optical fibers in a stress free condition.
  • Filling Compounds: We can include specially formulated thixotropic filling compounds for void filling, vibration protection and hydrogen absorption generated by the fibers. All our compounds are compatible with the optical fibers within the tube.

Laser Welded Fiber Optic Tubing – Uses

The fiber optic tubing K-Tube manufactures can be used as manufactured with no additional protection. However, if your project requires over-jacketing, reinforcement, or other buffers, our team can work with you to integrate our fiber optics into your cable design.

Integration examples include:

  • Over jacketed with thermoplastic materials such as Polyethylene, Hytrell, Nylon, Polyurethane, and more
  • Ruggedized with high strength fibers such as S-Glass, E-Glass, carbon fibers Reinforced with synthetic strength members such as Kevlar
  • Reinforced with synthetic strength members such as Kevlar
  • Combined with electrical conductors in electro-mechanical cables
  • Used on conventional stranding, cabling and armoring equipment

For more information or to start your project, send us an email or give us a call.


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Chambos Theodossi

K-Tube’s resident expert, Chambos Theodossi (Theo), received his degree in electrical engineering in 1957 and has been involved in the ever-changing field of cable systems ever since. He participated in the design and manufacture of optical fibers in the early stages of their development. Theo is considered a leading expert, worldwide, in the development of underwater fiber optic cable systems.

Theo joined forces with the co-founder of K-Tube, Herb Karlinski, in 1984, to respond to the cable industry’s need for a robust fiber optic cable component, which could operate reliably in the harsh underwater environment. Since then, hundreds of thousands of kilometers of the product they developed has been produced and deployed in various forms and applications around the world.

Not Sure Where to Start?

Contact one of our experts to learn how we can fulfill all your tubing needs. From collaborating with our engineers to developing new raw materials to fulfill your purchase orders, our experts are standing by and ready to assist.