Certified Fiber Optics Practice Exam

What type of finish can reduce return loss in fiber optics?

1. Flat or blunt

2. Angular contact or physical contact

3. Rough or uneven

4. Fused or sealed

The correct answer is: Angular contact or physical contact

The choice that reduces return loss in fiber optics is angular contact or physical contact. This finish is designed to closely couple the fibers together, minimizing the air gap between them. Reducing the air gap decreases the reflections that can occur at the interface of the fibers, thereby lowering return loss. A physical contact finish allows for a smooth mating surface that promotes optimal light transmission and minimal signal degradation. In contrast, other finishes such as flat or blunt and rough or uneven can result in higher levels of return loss due to increased scattering and reflection at the connection point. A fused or sealed finish might also contribute to loss due to potential misalignment or imperfections at the splice point. Overall, using angular contact or physical contact techniques is crucial for achieving the best performance in fiber optic connections.