What core-alignment fusion splicing gets you
Core-alignment splicers image the actual glass core of each fiber and physically align the cores (not just the cladding) before the arc. On single-mode this consistently delivers 0.02-0.05 dB splice loss versus 0.05-0.15 dB from cladding-alignment splicers — a real difference on long spans, high fiber counts, or links close to the loss budget.

