Continuous oven

A continuous oven comprising a processing direction and at least one oven module which oven module has two openings positioned in such a way that at least one precursor fiber may pass through the oven module in the processing direction, the oven module further comprising at least one blower suitable for producing a gas flow perpendicular to the processing direction, at least one tunable radiative heater radiating perpendicular to the processing direction for heating the at least one precursor fiber to a first temperature, at least one second heater for heating the gas within the oven to a second temperature, at least one optical detection means, as well as at least one control unit wherein the blower, the radiative heater, the second heater, the optical detection means and the control unit serve as regulatory means for the heat emitted by the at least one precursor fiber in order to keep the temperature difference between the first temperature and the second temperature less than 10° C. with the first temperature being higher than the second temperature.