Which type of splice typically has a maximum loss of 0.3 dB?

The maximum loss of 0.3 dB is characteristic of a mechanical splice. This type of splice joins two optical fibers by aligning their cores and securing them in a way that allows light to pass through with minimal loss, but it does not permanently fuse the fibers as in a fusion splice.

Mechanical splices are advantageous in scenarios where quick, temporary connections are needed, or when the costs associated with fusion splicing equipment and techniques are prohibitive. The loss associated with these splices can be highly dependent on the quality of the alignment and the materials used, but under ideal conditions, they typically maintain losses around this level.

Other splicing methods, such as fusion splicing, usually provide lower loss (often less than 0.1 dB) because they create a continuous, homogeneous connection between the fiber cores through heat. The profession commonly recognizes fusion splices as the gold standard for permanent connections due to their low loss and reliability.