Stranded optical cables, while flexible and versatile, have higher costs, complex installation requirements, and are more prone to signal attenuation and environmental damage.

Higher Cost

Stranded optical cables are generally more expensive than central tube or copper cables due to their complex construction, which includes multiple loose tubes, protective materials, and specialized filling compounds to ensure durability and waterproofing . The cost of installation is also higher because they require trained technicians and specialized equipment.

Installation Complexity

The loose-tube design of stranded cables allows fibers to move within the tube, which improves flexibility but makes handling more delicate. Careful routing is required to avoid bending beyond the minimum bend radius, kinking, or crushing, which can damage the fibers . This makes installation more time-consuming and labor-intensive compared to simpler cable types.

Signal Attenuation

Although optical fibers are less susceptible to signal loss than copper, stranded cables can still experience attenuation due to dispersion, bending, or microbends in the fibers . The movement of fibers within the loose tubes can sometimes exacerbate these effects if the cable is not properly installed or maintained.

Environmental Sensitivity

Stranded optical cables are more vulnerable to environmental factors such as extreme temperatures, water ingress, and physical stress. While protective measures like hydrolysis-resistant materials and waterproof compounds are used, improper installation or damage to the outer layers can compromise performance .

Limited Flexibility in Tight Spaces

Despite being more flexible than solid-core cables, stranded optical cables are still less pliable than copper cables in very tight or complex routing scenarios. This can make them challenging to install in confined conduits or around sharp corners .

Maintenance and Repair Challenges

Repairing stranded optical cables is more difficult than repairing simpler cable types. The loose-tube structure requires careful splicing and handling to avoid fiber breakage, increasing maintenance time and costs . In summary, while stranded optical cables offer excellent flexibility and suitability for diverse applications such as overhead, direct burial, and underwater installations, their higher cost, installation complexity, susceptibility to signal attenuation, and environmental sensitivity are key disadvantages to consider when planning a network deployment .