When stripping singlemode or graded index multimode glass fiber, what layer is being removed?

When stripping singlemode or graded index multimode glass fiber, the layer that is removed is the primary buffer coating. The primary buffer coating is a protective layer that surrounds the glass core and cladding of the fiber optic cable. Its function is to provide mechanical protection and environmental resistance to the delicate glass fibers within. When preparing the fiber for termination or splicing, this primary buffer coat must be removed to expose the glass cladding and core, allowing for proper connection and transmission of signals.

Removing the primary buffer coating is essential because it ensures that the glass fiber is clean and ready for the attachment of connectors or fusion splicing. If this layer were not stripped, the fiber would not be able to make a proper optical connection, leading to signal loss or failure.

The other layers and components mentioned, such as the outer buffer coating and protective sheath, serve different purposes. The outer buffer coating typically provides additional protection against physical damage, while the protective sheath encases the entire fiber cable, offering environmental protection. These layers are not directly involved in the termination process and do not need to be removed when preparing the fiber for use.