Fiber optic components for HV/MV cables

Our FIMTs are the backbone of modern power and communication networks.

FIMT for high voltage/medium voltage cables

We provide specialized Fiber in Metal Tubes (FIMTs) as a fundamental component for companies manufacturing subsea cables for High Voltage/Medium Voltage applications. Our FIMTs stand out in the market with their exceptional fiber density, accommodating up to 192 fibers in a single tube. This capability allows for a more efficient use of space while maximizing data transmission potential. Additionally, our FIMTs are available in long continuous lengths of up to 50 kilometers, significantly reducing the need for splicing and ensuring smoother, more reliable cable performance. Behind every product is NBG’s commitment to high-quality manufacturing and rigorous quality control, ensuring that every FIMT component you receive is of the highest standard, ready to be integrated into your sophisticated subsea cable systems.

Example configurations

All our products are custom and designed to spec. Below are just a few examples to demonstrate our production capabilities.

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Need more information?

See our FIMT for HV/MV cables datasheet.

Outer diameter

from 1.10mm / 0.043 ″
to 5.30mm / 0.209 ″

Fiber count

1-144 (250μm)
1-192 (200μm)

Single tube wall thickness

from 0.125mm / 0.0049 ″
to 0.30mm / 0.0118 ″

Outer insulation

PA / LD / HD / XLPE / PVC FRNC / TPE / Semi-conductive PE

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Frequently asked questions

FIMTs are specialized tubes made from metal that encapsulate optical fibers. These tubes protect the fibers from external physical and environmental conditions, ensuring secure and reliable data transmission, especially in high voltage and medium voltage cable applications.

FIMTs enhance efficiency by providing a robust protective environment for optical fibers, which are used for monitoring and communication purposes alongside the electrical transmission. This dual functionality allows for real-time monitoring and control, leading to optimized operational performance and reduced downtime.

FIMTs enhance efficiency by providing a robust protective environment for optical fibers, which are used for monitoring and communication purposes alongside the electrical transmission. This dual functionality allows for real-time monitoring and control, leading to optimized operational performance and reduced downtime.

FIMTs are typically made from stainless steel or superalloys, offering high resistance to corrosion and physical stresses. Specific materials include common stainless steel variants and superalloys such as Alloy 625, Alloy 825, etc.

FIMTs are integrated into the cable structure either as part of the core or layered within the cable, depending on the cable design. This integration provides added protection for the optical fibers and contributes to the overall strength and durability of the cable.

Yes, FIMTs are ideal for sensing applications such as Distributed Temperature Sensing (DTS), Distributed Acoustic Sensing (DAS), and Distributed Strain Sensing (DSS). These applications are crucial for monitoring the integrity and performance of high voltage/medium voltage cables.