Two fibers become one. A fusion splicer aligns two glass cores to a fraction of a micron and welds them with an electric arc — a joint so good the light barely notices it’s there.
Preparation makes the splice. Strip the plastic coating back to bare glass, clean it with alcohol so no dust remains, then cleave a perfectly flat 90° endface with a precision cleaver. A bad cleave or a speck of dirt is the most common cause of a high-loss splice.
The splicer brings the two ends together and aligns their cores — the best machines watch the cores directly and nudge them into line. Then two electrodes strike an electric arc that melts the glass tips and fuses them into one continuous strand, often with a loss estimate on screen.
A fresh splice is bare glass and fragile. Slide a heat-shrink protection sleeve over it and heat it so it grips and supports the joint, then coil the fiber neatly into a splice tray. Done well, a fusion splice adds only a few hundredths of a decibel and lasts the life of the cable.
The Fiber Optic Lab turns these concepts into hands-on instruments you can practise safely — no fragile fiber, no costly gear. Log in to the suite to try them.
Confidential — prototype under development. This prototype and all associated content are the proprietary and confidential property of Daw Alfada, shared solely for authorized technical review. Any unauthorized copying, redistribution, reverse engineering, or commercial use — in whole or in part — is strictly prohibited. © 2026 Daw Alfada. All rights reserved.
