Dirt or entrapped air may create a

Dirt or entrapped air may create a bubble or bubbles, resulting in a high-loss fusion splice like the one shown in Figure 25.47. To prevent bubbles:

1. Ensure you are using the types of cleaning products and the cleaning processes required by the fusion splicer and cleaver manufacturer or described in this chapter.
2. Verify that you have selected the appropriate splicing program or profile for the optical fiber you are splicing.