A tail fiber, also known as a fiber optic patch cord, consists of a connector on one end and a cut end of the fiber optic cable core on the other. It often appears in fiber optic terminal boxes. Compared with quick termination or epoxy and polish connections placed on the field. Thorlabs' UV fused silica end caps range in size from Ø1 mm to Ø8 mm. Get the wrong connector type, the wrong polish, or skip proper fusion splicing technique—and you're looking at elevated signal loss, increased back reflection, and a. Veekay fibre optic patch cords are one of the most commonly used components of the fibre optic network. Patch cords may be broadly classified as per fibre type / count & connector type / count.