Light conducting cable including a heat removable layer for preventing tension and a method of making same

摘要

Undesirable attenuations are avoided in a light-conducting cable by providing a certain play between the coated light-conducting fiber and its outer protective casing which may include a reinforcing sheathing surrounding the coating and surrounded by an outer casing. Such play is achieved by temporarily providing a removable material radially inwardly, or in, or radially outwardly of the sheathing and then removing such temporary layer by chemically dissolving the layer, or melting, or evaporating the layer through the outer casing which is made permeable for this purpose.