Hollow core fibres use a high reflective coating on the inner surface to confine the light and overcome the high attenuation of silica at long wavelengths. Cleanliness of the inner surface can be maintained by using a ZnSe window in the connector.
Other types of connector designed for high optical power, with free-standing fibre or end caps for beam expansion, can be used with conventional or large core fibres to accommodate the optical powers required. Laser Components can design and manufacture complete custom solutions from a wide range of fibre/connector combinations with AR coatings, and provide fibre couplers.