Poor Fiber Cleave: Angled or chipped cleaves prevent proper core alignment. Dirty Fibers: Dust, oil, and residue reduce splice quality. Misalignment: Incorrect positioning of fibers leads to light leakage. Core vs Cladding Mismatch: Using different fiber types without adjustment. Are you looking for ways to improve the performance of your fiber optic splices? If so, you've come to the right place. In this blog post, we'll examine the factors that affect splice performance, including intrinsic factors, extrinsic factors, and core diameter mismatch. Two different methods exist for splicing fibers: Typical splice loss values (the measure of loss in optical power across the splice point) are usually lower for fusion splices (typically less than 0.