Are all fiber optic cables spliced ​​using fusion splicing How are they spliced

Not all fiber optic cables are spliced using fusion splicing; they can be connected either by fusion splicing or mechanical splicing depending on the application and performance requirements.Fusion SplicingFusion splicing is the process of permanently joining two fiber ends by welding them together using an electric arc. This method provides the lowest signal loss (typically 0.1 dB), minimal back reflection, and the strongest, most reliable joint between fibers . Fusion splicing is widely used for single-mode fibers and long-haul networks where signal integrity is critical. The process involves:Precisely cleaving the fiber ends using a precision cleaver.Aligning the fibers using a fusion splicer, often with optical core alignment.Fusing the fibers with an electric arc to create a continuous optical path. Fusion splicing can be applied to single fibers or entire fiber ribbons, making it suitable for high-capacity networks .Mechanical SplicingMechanical splicing is an alternative method that does not permanently fuse the fibers. Instead, the fiber ends are aligned within a small housing using an index-matching gel to allow light to pass through. Mechanical splices typically have slightly higher insertion loss (0.2–0.75 dB) and more reflection than fusion splices, but they are faster, easier, and require less expensive equipment . Mechanical splicing is often used for:Quick repairs or temporary connections.Short-distance or low-speed networks.Situations where budget constraints prevent the use of fusion splicing. Mechanical splices can be permanent or re-enterable and are available for both single-mode and multimode fibers .Summary of Connection MethodsFusion Splicing: Permanent, low-loss, high reliability, ideal for long-haul and critical networks.Mechanical Splicing: Non-permanent, slightly higher loss, faster and simpler, suitable for temporary or short-distance connections. In addition to splicing, fiber optic cables can also be connected using connectors for patch panels or equipment interfaces, which allow frequent connection and disconnection but generally have higher insertion loss than splices . Overall, the choice between fusion and mechanical splicing depends on network requirements, cost, and installation environment.