What are protection sleeves?

Protection sleeves are commonly used when two fibers are fusion spliced together. The protection sleeve is meant to protect the splice joint and exposed fiber after the splice has been completed.

Fusion splicing is a process where two optical fibers are aligned and then joined together by melting the optical glass in a controlled manner. Once this is completed, the splice provides an almost 0dB loss connection. The splice may be tested for Tensile strength as a final test and approval. If the splice passes the tests it is deemed good and the splice will need to be protected. Here is where the protection sleeve comes in!