Unlike a patch cord—which has connectors on both ends—the bare fiber end of a pigtail is designed to be permanently spliced (either by fusion or mechanical splicing) to the incoming fiber cable in the field. The most efficient way to terminate a fiber run is by using a pigtail. A fiber pigtail is a short length of optical fiber that comes with a high-quality, factory-polished connector already installed on one end, leaving a length of exposed glass on the other. 0dB loss due to pressure on the cable or over 10dB loss due to a splitter? It all adds up, and PONs aren't the only thing fiber gets used for. Once the two optical fibers are joined with a splice, they cannot be taken apart. In this detailed video, we'll walk you through the fiber optic pigtail splicing process — from preparation to final testing. If you're new to fiber optics or want to enhance your technical skills, this guide will help you understand how to splice fiber pigtails safely and efficiently.