Causes include poor fusion splicing, misalignment of fiber cores, excessive cleave angle, or contamination in the splice. Re-splice the fiber if necessary and ensure proper alignment and cleanliness before fusing. Problems within a fiber link can occur due to a wide variety of reasons. A very common problem is that a connector is not fully engaged - often hard to notice in a crowded patch panel. High Splice Loss The Problem: The most common Fusion Splicing Problem is dust. Contaminants on the endface can cause high insertion loss and back reflection, much like a dirty window blocks sunlight. The recommended three-step cleaning method includes: Wipe the bare glass with a lint-free wipe soaked in anhydrous isopropyl. Fiber optic fusion splicers require precise operation. 1 dB). Fiber optic splicing combines precision mechanics, material behaviour, and environmental factors, all of which influence the result.
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