What are essential prerequisites for performing a fusion splice on optical fibers?

A controlled environment and a large work surface are indeed essential prerequisites for performing a fusion splice on optical fibers. When working with optical fibers, the environment in which the splice is made must be stable and free from contaminants like dust and moisture. A controlled environment allows for maintaining optimal conditions that prevent damage to the fibers and ensures precise work.

Additionally, a large work surface is important because it provides the necessary space to handle the splicing equipment and fibers without the risk of dropping or misplacing them. Properly managing the physical space helps technicians carry out their tasks efficiently and safely, allowing for the careful alignment and manipulation of fiber strands, which is crucial for achieving a successful splice.

The other choices do not support the requirements for a successful fusion splice in the same way; for instance, a bright, outdoor environment may introduce adverse elements that can affect the splice quality, while high-traffic areas can lead to disruptions and increased risk of contamination or accidents. A cluttered workspace, meanwhile, would hinder organization and the focus needed for such precision work.