Expanded Beam Fibre Connectors

Expanded Beam connectors are designed to meet the requirements of MIL-DTL-83526 Military Specifications. Expanded Beam fibre optic connectors are designed to operate in harsh environments, they use non-physical contact fibre optic termini that are IP68 sealed behind an anti-reflective coated ball lens.

A key advantage of the Expanded Beam fibre connector design is that the fibres are protected from the elements and each other. Rather than the traditional butt joint which requires each fibre core to be precisely aligned (to within a micron), expanded beam employs a precision lens to optically expand the light from each core by approximately 40 times its original size, and then refocus back into the mating connector.


A small gap is maintained between the lenses, this minimises the effect of dust, debris, temperature variation, vibration and dirt on the lights path. The lens also means it can be easily cleaned without risk of damaging the fibre – if a connector is dropped into mud, it can simply be washed or wiped and reconnected.

Expanded Beam Comparison Table

Universal Networks has two ranges of Expanded Beam, the F BEAM which is part of our ArmourLux family of deployable fibre products and is available in 2 and 4 fibre channel options and singlemode or multimode fibre. We can also supply the Neutrik FIBERFOX range, a multimode assembly available in 2 and 4 fibre channel options.


Looking For A Bespoke Solution To Suit You?