A fiber optic splicer is a tool used to join two optical fibers end-to-end, primarily through a process called fusion splicing, which involves melting the ends of the fibers together using an electric arc. This process creates a continuous path for light signals with minimal reflection and insertion loss, making it essential for applications in networking and telecommunications . Fusion splicers are crucial for maintaining low-loss connections in fiber optic networks, including telecom, FTTH, and data center applications . They are often used alongside fiber optic cleavers and cleaning tools to ensure optimal performance .