Patent ID: 7153115

Claim:
An optical fiber cooling tube comprising: an internal cavity having a diameter larger than an outer diameter of an optical fiber passed through the cavity in a flow direction from a first end of the tube to a second end of the tube, which is opposed to the first end; injection groups that are distributed along the tube, open into said cavity, and are oriented in a contraflow direction relative to the flow direction in which said optical fiber moves; and aspiration groups that are distributed along the tube, open into said cavity and are oriented in the contraflow direction relative to the flow direction in which said optical fiber moves, said injection groups, of which there are at least three each comprising one or more injection passages, alternating along said tube with said aspiration groups, of which there are at least three each comprising one or more aspiration passages, the only openings to the outside of the tube being said injection passages, said aspiration passages and the first and second ends of said tube.