The “FC” or “fiber connector” from NTT (Nippon Telephone and Telegraph) was the first connector to use the 2.5 mm ceramic ferrule. The uneven expansion coefficients sometimes caused the adhesive to fail, allowing the fiber to extend or retract, a process called “pistoning.” The ceramic ferrule had a very low expansion, like glass, so the adhesive held better, the connector could be polished to a finer finish and performed better over extremes in temperature. Metal ferrules had a problem with glass fiber. The next major development in fiber optic connectors came from Japan, with the development of the ceramic ferrule. It was developed by Amphenol using the hardware from the “SubMiniature A” microwave connector, hence it’s name, with a precise 1/8 inch machined metal ferrule. ![]() The SMA connector was the first connector widely used for data links using multimode fiber. The original Biconic was actually molded around the fibers to get exact centering, a practice that stopped when they developed a way to insert a 125 micron ( 5 mil) pin in the plastic molding cavity to produce a connector ferrule with a hole into which fibers could be epoxied. Is the FOA Tech Topic that identifies most popular connectors from the history of fiber optics.) AT&T named their first commercial fiber optic connector the “Biconic” since the connector had a conical molded-plastic ferrule that fitted into a “bi-conical” mating adapter when connected to another connector. Some of you may remember the Biconic and SMA connectors which were the most popular connectors 25+ years ago. But we’ll also cover some important information about fiber optic connector design and termination along the way. Since some of us have been in the business for over 25 years ourselves, we do remember some of the origins of these terms and find it amusing to share the stories. ![]() ![]() Rarely do FOA instructors present a fiber optic seminar without getting some questions on what some connector terminology means or how such a term or connector name originated. ![]() As a global electronics company with 80 years of experience in developing innovative solutions for complex industrial technology applications used in harsh environments, our broad and diverse team of industry experts includes electrical and mechanical engineers who focus on designing electronic components and electrical components manufactured for reliability, safety, and sustainability, offering technological solutions that help empower the potential of people to drive innovation in the technologies transforming how people live, work, and connect.The FOA Reference For Fiber Optics - Connector Types and TerminologyĬonnector Types and Terminology – What's In A Name? Our electrical and electronic products are engineered to reliably connect and protect the flow of data, power, and signal – in electric vehicles and aircraft, digital factories and smart homes, and life-saving medical devices, efficient utility networks, and the global communications infrastructure. TE Connectivity empowers engineers for innovation in industrial technology – by designing and manufacturing sensor and connectivity solutions for the technology that is enabling a safer, sustainable, productive, and connected world. As the go-to engineering partner for today's innovation leaders and technology entrepreneurs, we are helping solve tomorrow's toughest challenges.
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