Standard telecommunications and data transmission networks that use optical fiber cables for signal transmission operate with optical radiation power levels in the order of units to tens of mW. The optical power of the transmitted signal usually does not exceed the absolute value of 20 dBm, which represents 100 mW. SM single mode or MM multimode fibers are usually used for the transmission of these signals, and a whole range of optical connectors operating on the PC, physical contact principle are then used for their connection. The connection for signal transmission must be ensured by core-to-core alignment, i.e. on an area with dimensions of up to 10 μm single mode and 50/62,5 μm multimode.

The HPF optical connector is intended for systems operating with high levels of optical power, it is designed for high-performance applications with optical power up to 6 W for SM and 10 W for MM fibers

The connector works on the principle of physical contact (PC) connection technology with an increased mode field diameter to reduce power density at the ferrule face of the connected connectors. A part of the standard fiber is connected to a fiber with a graded refractive index, which increases the fiber core diameter and reduces the power density at the connector interface. Lower energy density eliminates damage to the surface of the optical fiber, mainly due to micrometric impurities that heat up strongly at higher optical signal levels.