G657A Outdoor FTTH Drop Cable 1/2/4/8core

G657A fiber is essential for modern fiber-optic networks that require robust, bend-insensitive performance, particularly in tight spaces. Their flexibility and compatibility with existing G.652 fibers make them a popular choice for FTTH, FTTB, and other high-density applications.

Strength member (CSM): FRP /Steel wire /KFRP as options

Messenger wire : Solid steel wire as support , anti-corrosion Phosphate steel wire material with good protection

Fiber :New Grade A quality color coated fiber, G657A Fiber with excellent bend radius performance is priority

Sheath: Low smoke zero halogen LSZH LSOH allows for safety and environmental protection.

Technical data sheet：

Key Features of G.657A Fiber:
Bend Insensitivity

G.657A fibers are designed to tolerate very tight bends without significant signal loss, making them ideal for use in environments where space is limited or where fibers need to be routed around tight corners.
The minimum bend radius for G.657A fiber can be as low as 7.5 mm, which is significantly lower than the standard G.652 fibers (which typically require at least 30 mm).

Compatibility with G.652D Fibers

G.657A fibers are fully compatible with G.652D fibers, which are the most common type of single-mode fiber used in long-distance and metro networks.
This ensures that G.657A fibers can be spliced or connected to existing G.652 networks without any additional considerations, making it easier to integrate into existing fiber infrastructure.

Low Attenuation

Despite their bend insensitivity, G.657A fibers still offer excellent attenuation characteristics, particularly in the commonly used wavelength ranges (1310 nm, 1550 nm, and 1625 nm).
Typical attenuation is around 0.35 dB/km at 1310 nm and 0.2 dB/km at 1550 nm, comparable to G.652 fibers.

Subcategories:

G.657.A1: Can tolerate a minimum bend radius of 10 mm. Offers a good balance between bend performance and compatibility with G.652 fibers.
G.657.A2: More bend-tolerant than G.657.A1, with a minimum bend radius of 7.5 mm, making it ideal for environments where fibers are subject to sharp bends and compact installations.