Certified Fiber Optics Practice Exam

What is the purpose of a buffer in a fiber optic cable?

1. To provide tensile strength

2. To protect the fiber from moisture

3. To reduce signal loss

4. To insulate the fiber

The correct answer is: To provide tensile strength

The role of a buffer in a fiber optic cable is multifaceted, primarily focusing on providing protection and support to the optical fibers contained within. In this context, it serves to ensure that the delicate glass fibers are shielded from physical damage and environmental factors. The buffer helps maintain the integrity of the fibers by adding tensile strength, which is particularly important during installation and handling. Fiber optic cables are often subjected to pulling and bending forces; without sufficient tensile strength, the fibers could break or become misaligned, leading to signal loss or complete failure of the communication system. While the buffer does also offer some protection from moisture and environmental conditions, its primary purpose is to preserve the fibers' structural integrity and prevent physical harm. Therefore, understanding its role in providing tensile strength is crucial for recognizing how it contributes to the overall performance and reliability of fiber optic systems.