These two kinds of bend insensitive fiber patch cables will be introduced below.
Single-mode Bend Insensitive Fiber Patch Cable
Single-mode bend insensitive fiber patch cables have been commercially available for a few years. ITU recommendation G.657 specifies two classes of single-mode bend insensitive fiber patch cables: G.657 A and G.657 B. Each category (A and B) is then divided into two sub-categories: G.657.A1, G.657.A2 and G.657.B1, G.657.B2. The minimum bend radius of G.657.A1 fibers is 10 mm, G.657.A2 and G.657.B1 fibers is 7.5 mm and G.657.B2 fibers is 5 mm. G.657.A1 and G.657.A2 fibers are fully compliant with ITU-T G.652.D fibers.
Compared with minimum bend radius of the standard single-mode G.652 fibers, which is usually 30 mm, G.657 single-mode bend insensitive fiber patch cables are much more flexible, which thus can be confidently installed with a variety of installation methods and in the increasingly high-density application spaces of today's data center.
Multimode Bend Insensitive Fiber Patch Cable
Multimode bend insensitive fiber patch cables with a minimum bend radius of 7.5mm compares very favorably to the 30mm bend radius traditionally specified. To achieve this, an optical "trench" is added to the cladding area outside of the fiber core. This trench retains most of the light that would have escaped the core of a traditional multimode fiber.
Requirements for a tighter bend radius have been developed based primarily on factors in the FTTH (fiber to the home) market. However, the benefits for premise markets have rapidly become apparent, particularly in data centers where more and more fibers are being installed in smaller areas. The expectation is that this new feature can enable deployment of multimode fibers in higher densities.
Conclusion
Bend insensitive fiber patch cables are made with solid trench which assists fiber optic cable to reduce optical loss when the cable is bent. They provide the same high quality, mechanical features and optical performance as standard fiber patch cords with the added capability of maintaining optical performance when bent or flexed. Bend insensitive fiber patch cables are available for multimode (OM2, OM3 and OM4) and single-mode (OS2) networks. Whether to choose single-mode bend insensitive fiber patch cables or multimode bend insensitive fiber patch cables, you can make a decision based on your applications. HTF team will assist you to manufacture the suitable Bend insensitive fiber patch cord.
