Singlemode and multimode fiber pigtails each serve distinct roles in optical networks. Although they may appear similar at first glance, singlemode and multimode fiber pigtails differ significantly in fiber structure, transmission performance, cost, and. In this guide, we'll break down what fiber optic pigtails are, how they work, their types, and how to choose the right one for your application. What Is a Fiber Optic Pigtail? A fiber optic pigtail is a short optical fiber cable that has a connector on one end and an exposed (unterminated) fiber on. A fiber optic pigtail is a short length of optical fiber —typically 0. In such contemporary fiber optic communication systems, low-loss, and connectivities, which have reliability, are crucial for not only maintaining high-speed but also high-quality data transmission.