Bend Insensitive cable is a state-of-the-art product being developed to improve network performance in many of today’s FTTx applications. It is being ftth drop cable distributor used to replace conventional Fiber Optic Cable in many applications.
Some of the reasons that bend insensitive cable is being deployed are:
* Less attenuation which makes it more efficient
* Easier to deploy in customer premises because of tight angles
* Space saving as the future need is for smaller, denser cable
* Important component for linking various kinds of equipment that require micro-bending sensitivity
* Excellent for excess cable in patch panel storage tray
* Adheres to new bend-sensitive standard G.657.B
Bend-improved fibers have been introduced into some cabling and hardware applications to significantly reduce the size of key Fiber to the Home (FTTH) passive field equipment (e.g. local convergence cabinets), making installations easier and more cost-effective. The next generation of FTTH deployments and carriers’ applications are for multi-dwelling units (MDUs) or even in-home wiring. Cost has always been the critical element in the business case for FTTH networks. Network carriers quickly understood the value of pre-connectorized solutions for the drop cable assembly. Bend-insensitive fibers are used with small form factor enclosures such as (local convergence cabinets). These ‘splitter cabinets’ are approximately 40% less in weight and 75% smaller in size which is aesthetically pleasing for neighborhoods.
One of the key design requirements for bend-insensitive fibers is backwards compatibility with the installed base of low water-peak singlemode fibers. This is important information for installers and network planners. The second item of importance is mechanical reliability with a small bend diameter fiber. In FTTx network installations having very dense fiber ports in service terminals and also the nature of indoor installation practices, the drive to bend the fiber well below the 64mm diameter limit is great, hence the smaller bend standard G.657 was developed. Reliability failure for the lifetime of the fiber becomes finite (non-zero). In addition in today’s marketplace where many former copper installation technicians are being utilized to install fiber, they don’t have to learn additional parameters relating to bend-radius, etc. This reduces the customer time to market, and also reduces training costs, installation costs, etc.
In summary, when choosing the right fiber type for applications requiring small bend diameter, it is important to differentiate between existing and new applications. For bend diameters above 20mm, state of the art bend-improved fibers can exceed the G.657.B standard for bend-tolerant fibers while guaranteeing full backwards compatibility. However, to solve installers problems in tough environments such as MDUs where the bend diameters can go as low as 10 to 15 mm, a new technology for fiber, cable and hardware is required to ensure truly bend-insensitive performance while maintaining a high degree of reliability and enable backwards compatibility.