GYFTW Central Loose Tube Fiber Cables

GYFTW Central Loose Tube Fiber Cables

GYFTW central loose tube fiber cables are ideal for use in conduit, direct burial and lashed aerial applications. They have a low fiber count, ranging from 2 to 24 fibers and feature a non-metallic strength member.

The core of this cable consists of a central tube filled with gel or dry compound. PSP is longitudinally applied around the tubes and the cable is completed with a PE sheath for excellent mechanical and temperature performance.

Optical Performance

GYFTW central loose tube cable is a high-speed optical fiber transmission cable for telecommunications networks. It is commonly used in backbone and distribution networks for video, internet and telephone services to customers. It is also widely used in security and surveillance applications to transmit high-resolution video footage over long distances. In addition, it can be used in industrial automation applications to connect sensors and other devices to telecommunication networks.

The non-metallic central loose tube fiber optic cable is a flexible, lightweight and durable cable that can be strung overhead or buried underground. This type of cable can handle high pulling tensions and provides protection against moisture with a water blocking gel. It also has an LSZH (low smoke, zero halogen) jacket that meets the requirements of most indoor-outdoor environments.

In this type of fiber cable, the single-mode or multimode optical fibers are gyftw-central-loose-tube-fiber-optic-cables positioned in the loose tube which is made of high modulus plastic materials and filled with filling compound. The loose tube is then stranded around the central FRP strength member and then surrounded by aramid fibers. PSP is longitudinally applied around the loose tubes to improve the cable crush resistance and flexibility. In addition, the PSP enhances longitudinal water-blocking performance and two parallel steel wires are placed in the core to ensure tensile strength.

The central loose tube fiber optic cables are available in a wide range of fiber counts, and they can be installed in aerial, duct or direct burial installations. They also meet the needs of plenum or riser flame ratings, and they can be terminated using a breakout kit which sleeves each individual fiber and protects it in a splice closure.


The central loose tube design of these cables offers exceptional durability. They protect optical fibers from environmental factors and mechanical stresses that could otherwise cause physical damage. Specifically, the tight buffer layer isolates each individual optical fiber within the cable from external stresses such as temperature fluctuations and physical bending or twisting. This helps to preserve the integrity of the optical signals and ensures optimal performance over long distances.

The loose tube cable also features a resilient, non-hygroscopic gel that prevents water from entering the tube and contaminating the optical fibers. This gel, along with the cable’s protective jacket, helps to decouple the fiber from other stressors such as extreme temperature variations and material contractions. As a result, these cables are an ideal choice for harsh outdoor and challenging environments.

In addition to the protective gel and jacket, these cables are typically built with strong, abrasion-resistant fiberglass or aramid strength members. These strengtheners help enhance the cable’s tensile strength, which is crucial for durability and performance. They are also insulated with a primary and secondary coating system, which helps to safeguard the optical fibers and provide initial isolation from environmental elements.

These cables are then sheathed with a high-modulus plastic and filled with water blocking compound. They are also surrounded by a central, aramid strength member and finished with a flame retardant PE sheath. These features ensure that the central loose tube cable is well-suited for aerial, duct and direct burial installations.

Environmental Resistance

Optical fiber cables must be able to endure harsh environments during installation and operation. This includes exposure to moisture, heat, ice, and vibrations. A cable that is unable to withstand these environmental conditions may become damaged and lose performance over time. Choosing a cable with a protective sheath that shields the core and structure of the cable will ensure it is protected from these factors.

Loose tube cables feature an insulated, gel-filled design that protects the coated optical fiber from these stresses. The gel also protects the fiber from moisture and the long-term degradation it can cause. This makes loose tube cables the most popular choice for outside plant trunks that will be strung overhead or buried underground.

Additionally, many loose tube cables are rodent resistant. This is achieved through a layer of water-blocking compounds that prevent rodents from chewing on the fibers or penetration of the cables with their teeth. In addition, these cables have a microduct-air-blowing-fiber-micro-duct-tube-hdpe central strength member that provides mechanical protection to the optical fibers from crushing or stress during installation.

For maximum durability, choose a cable with a strong, high-density polyethylene jacket that offers abrasion resistance. In addition, it is essential to use efficient cable pulling techniques during installation to minimize stress on the cable and prevent damage. Also, be sure to install abrasion-resistant equipment and avoid rough or abrasive surfaces near the cables’ routing paths. Finally, regularly inspect and maintain the cables to identify any issues before they impact performance.


Loose tube fiber cables are the dominant cable type used in campus backbone installations. Their unique design isolates the individual optical fibers from mechanical, environmental and temperature stresses, which allows them to provide unparalleled performance. In addition, the loose-tube design is more economical than armored designs with a similar performance profile.

The non-armored loose tube cable sheaths a single-mode or multimode optical fiber into high-modulus plastic filled with filling compound. The central FRP strength member provides non-metallic anti-electromagnetic performance and improves tensile strength. The fibers are then stranded together around the strength member and the water-blocking materials are distributed into interstices of the loose tubes.

The fibers are then wrapped in an aramid yarn and encased in a fire retardant PE sheath. The resulting cable offers a high-performance all dielectric, low cost design with up to 24 fibers in a central loose tube, reducing overall size and saving space and money in conduit. The central loose tube can be terminated using a breakout kit which sleeves each individual fiber and provides splice closure protection. The breakout kit also reduces the number of loose-tube cable splice kits required in a installation, further reducing labor and material costs. This cable is suitable for aerial, duct or direct burial and has riser and plenum flame ratings.

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