Sensor to infrared waves evanescent and its method of manufacturing

摘要

The present invention relates to a fiber enabling the propagation of the infrared light at least one wavelength of 0.8 to 25 micrometers, the fiber comprising successively, along its length a first portion (23) for guiding the infrared wave, a second portion (25) of the detection is intended to come into contact with an external medium, in order to detect infrared signatures disturbing the propagation of the evanescent waves propagating along the fiber (2), and a third segment (27) for guiding the infrared wave. The present invention is characterized in that in the second portion (25) of a fiber having the function of detecting the fiber (2) is constituted by a curved part whose radius of curvature is locally lower than 2.3 mm.