25mm ferrule for high-density networks. Fiber connector types LC, SC, FC, ST, MTP, and MPO are widely used in past and present. What are the differences between them? Who is the most popular one? Find the answer in the article. What is a Fiber Connector? The optical fiber connector is a kind of detachable passive optical component used. Fiber optic connectors play a crucial role in the world of telecommunications and data networking, acting as the critical interface between fiber optic cables and the devices or networks they connect. They are small, often overlooked components, yet they are essential for ensuring high-speed, low-loss, and reliable optical transmission. This guide breaks down LC, SC, ST, FC, and MPO/MTP connectors to help you decide the best fit for your application.