What type of loss occurs when the fiber-optic bend radius decreases?

When the bend radius of a fiber optic cable decreases, macrobending loss occurs. This type of loss is associated with large bends in the optical fiber, which can lead to some of the light escaping from the core of the fiber. In this scenario, if the bend is too sharp or pronounced, the light does not remain confined within the core as effectively.

Macrobending loss is particularly relevant because fiber optic cables must be installed and routed carefully to avoid sharp bends that could lead to signal degradation. Understanding the implications of bend radius is essential in maintaining optimal signal strength and ensuring the reliability of the fiber optic system.

In contrast, microbending involves very small deformations or pressures that cause slight curves in the fiber, while attenuation refers to the overall loss of signal strength over distance without focusing specifically on bend-related losses. Scattering is a physical phenomenon that occurs due to imperfections and is not directly related to bending of the fiber. Thus, identifying macrobending as the type of loss associated with decreased bend radius is important for technicians to ensure proper installation and maintenance of fiber optic networks.