Résumé
In nuclear industry, radiation protection is one of the most important matter of concern. By now, dosimetry is achieved with photographic films (the legal dosimeters in France), ThermoLuminescent Dosimeters (TLD) and electronic ones. All of them measure local dose. In the frame of the ALARA concept (As Low As Reasonably Achievable), we develop a new approach based on optical fiber and luminescent materials presenting the phenomenon of Optically Stimulated Luminescence(OSL) in order to improve the remote dosimetry monitoring. So, as TLD, OSL material can trap electrons, created by several kind of irradiation (UV, X, ‘y,...), on stable levels. But instead of being realised thermally, electrons are released by light and produce a luminescence which is proportional to the "data stored" left by irradiation enabling the dose measurement. The OSL phenomenon offers the same advantages as TLD and the interesting possibility of a remote optical stimulation. On this assumption,we have developed a radiation sensor based on an Optically Stirnulable Luminescent (OSL) material coupled with an optical fiber.