Standards such as IEC 61300-3-47, Basic test and measurement procedures for end face geometry of PC/APC spherically polished ferrules using interferometry, and a series of IEC 61755 standards covering angle polishing, ferrule geometry, materials, and other connector parts . Standards such as IEC 61300-3-47, Basic test and measurement procedures for end face geometry of PC/APC spherically polished ferrules using interferometry, and a series of IEC 61755 standards covering angle polishing, ferrule geometry, materials, and other connector parts . Standards such as IEC 61300-3-47, Basic test and measurement procedures for end face geometry of PC/APC spherically polished ferrules using interferometry, and a series of IEC 61755 standards covering angle polishing, ferrule geometry, materials, and other connector parts, provide precise. e cited in contract, program, and other Agency documents as a technical requirement. This Standard may also apply to the Jet Propulsion Laboratory other contractors, grant recipients, or parties to agreements only to the extent specified or referenced in their contracts, grants, a ontain. That is why relying on International Electrotechnical Commission (IEC) industry standards and innovative inspection equipment is the most reliable way to ensure automatic, consistent, and repeatable certification of fiber cleanliness based on specific acceptance criteria. Every fiber installation. Mainstream Fiber Connectors Types and Applications Definition: MPO connectors are high-density, multi-fiber connectors designed to accommodate multiple fibers in a single interface, supporting parallel connections for 8, 12, or 24 fibers. Maximizes space efficiency: Saves physical space and. Optical Fiber infrastructures are increasingly common in government, military, business, and industrial applications. This increased deployment of optical fiber networks, and the need for reliable high bandwidth makes the simple task of checking and inspecting connector end-faces a crucial process. configurations. There are two types of end faces for the ferrule (either domed or flat) and two types of polishes (either physical contact, PC, or non-conta, NC) addressed.